CN221067794U - Charging gun, charging pile and charging system - Google Patents

Abstract

The utility model provides a rifle, fill electric pile and charging system charges, this rifle that charges includes the rifle head and with the connecting cable that the rifle head is connected, the rifle head be used for with being connected by the target that charges, the connecting cable be used for with fill electric pile and be connected, including positive cable and negative pole cable in the connecting cable. The positive electrode cable is provided with a first cavity, a first liquid inlet and a first liquid outlet which are mutually communicated, and a first channel is formed for conveying a cooling medium; the negative electrode cable is provided with a second cavity, a second liquid inlet and a second liquid outlet which are mutually communicated, and a second channel is formed for conveying the cooling medium. The first liquid inlet and the first liquid outlet of the positive cable are respectively connected with the first liquid supply port and the first liquid return port of the first liquid cooling box in the charging pile; the second liquid inlet and the second liquid outlet of the negative cable are respectively connected with the second liquid supply port and the second liquid return port of the second liquid cooling box in the charging pile. And then guarantee that positive cable and negative pole cable do not take place the short circuit at the during operation, improve the cooling efficiency and the radiating effect of positive cable and negative pole cable.

Description

Charging gun, charging pile and charging system

Technical Field

The application relates to the technical field of charging equipment, in particular to a charging gun, a charging pile and a charging system.

Background

In daily life, with the improvement of travel requirements, automobiles are more and more, and the use of a plurality of fuel automobiles not only aggravates the use of some non-renewable resources, but also pollutes the environment due to tail gas emission, so new energy automobiles are generated. Among them, the new energy automobile is a vehicle using other fuel than the conventional fuel.

However, as the charging power of the new energy automobile increases, the power of the charging gun used on the charging pile for charging the battery of the new energy automobile also increases, which results in an increase in the heat of the charging gun. In order to cool the charging gun, the heat generated by the charging gun is generally absorbed in a liquid cooling mode at present, so that the purpose of cooling the charging gun is achieved.

In the liquid cooling mode, if an insulating cooling medium is used, the insulating cooling medium is directly contacted with the positive cable and the negative cable in the connecting cable to dissipate heat, however, the cooling efficiency of the positive cable and the negative cable is low and the heat dissipation effect is poor due to the self characteristic of the insulating cooling medium; if a non-insulating cooling medium is used, in order to prevent the positive cable and the negative cable from being shorted, an insulating protection layer wrapping the positive cable and the negative cable needs to be in thermal contact with the liquid cooling tube, and the positive cable and the negative cable are cooled by the non-insulating cooling medium flowing in the liquid cooling tube.

Disclosure of utility model

The application provides a charging gun, a charging pile and a charging system, which are used for cooling and radiating by directly contacting a cooling medium with a positive electrode cable and a negative electrode cable in a connecting cable of the charging gun, ensuring that the positive electrode cable and the negative electrode cable in the connecting cable of the charging gun are not in short circuit during cooling, and improving the radiating or cooling effect of the positive electrode cable and the negative electrode cable.

In a first aspect, the application provides a charging gun, which comprises a gun head and a connecting cable connected with the gun head, wherein the gun head is used for being connected with a charged object, and the connecting cable is used for being connected with a charging pile; the connecting cable comprises a positive cable and a negative cable; the positive electrode cable is provided with a first cavity, a first liquid inlet and a first liquid outlet, wherein the first liquid inlet and the first liquid outlet are communicated with the first cavity to form a first channel for transmitting cooling medium; the first liquid inlet is used for being connected with a first liquid supply port of a first liquid cooling box in the charging pile, and the first liquid outlet is used for being connected with a first liquid return port of the first liquid cooling box; the negative electrode cable is provided with a second cavity, a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are communicated with the second cavity to form a second channel for conveying cooling medium; the second liquid inlet is used for being connected with a second liquid supply port of a second liquid cooling box in the charging pile, and the second liquid outlet is used for being connected with a second liquid return port of the second liquid cooling box. The cooling medium may be, for example, a non-insulating liquid.

It can be seen that, for the positive cable, the positive cable forms a first channel through the first cavity, the first liquid inlet and the first liquid outlet of the first liquid cooling box, and the first channel is communicated with the first liquid supply port and the first liquid return port of the first liquid cooling box, so that a first cooling loop only used for radiating the positive cable is formed. For the negative cable, the negative cable is communicated with the second cavity, the second liquid inlet and the second liquid outlet of the negative cable to form a second channel, and the second channel is communicated with the second liquid supply port and the second liquid return port of the second liquid cooling box, so that a second cooling loop which is only used for radiating the negative cable is formed. Because the independent storage cooling medium of first liquid cooling tank and second liquid cooling tank promptly the cooling medium of first liquid cooling tank does not take place to blend with the cooling medium of second liquid cooling tank, therefore the positive pole electron that the positive cable took when the during operation does not form the current path with the negative pole electron that the negative pole cable took when the during operation, even consequently cooling medium is uninsulated liquid, the positive pole cable still can not take place the short circuit with the negative pole cable when cooling, ensures the security of rifle work that charges. Because the first cavity in the positive cable and the second cavity in the negative cable respectively transmit the cooling medium of the first liquid cooling box and the cooling medium of the second liquid cooling box, the positive cable and the negative cable are equivalent to respectively and directly contact with the cooling medium of the first liquid cooling box and the cooling medium of the second liquid cooling box, indirect contact is not needed through insulating pipes and the like, and the cooling efficiency and the heat dissipation effect of the positive cable and the negative cable in the connecting cable of the charging gun are improved.

In some embodiments, the positive cable includes a positive transmission cable, a positive terminal, and a first connection; the positive electrode transmission cable is provided with the first cavity, the positive electrode terminal is arranged at one end of the positive electrode transmission cable, and the first connecting piece is arranged at the other end of the positive electrode transmission cable; the negative electrode cable comprises a negative electrode transmission cable, a negative electrode terminal and a second connecting piece; the negative electrode transmission cable is provided with the second cavity, the negative electrode terminal is arranged at one end of the negative electrode transmission cable, and the second connecting piece is arranged at the other end of the negative electrode transmission cable; the positive terminal and the negative terminal are used for being connected with the charged object, and the first connecting piece and the second connecting piece are used for being connected with the charging pile.

In the technical scheme, the positive electrode terminal and the negative electrode terminal are used as the contact pin terminals of the gun head of the charging gun, the charged target is connected with the insertion holes matched with the contact pin terminals, and then the positive electrode terminal and the negative electrode terminal are connected with the charged target to charge the charged target. The charged object is a load device such as an electric car. The first connecting piece and the second connecting piece can be conductive copper bars, and are connected with the charging pile through the first connecting piece and the second connecting piece, so that the positive electrode transmission line and the negative electrode transmission line can transmit current provided by the charging pile and transmit the current to the positive electrode terminal and the negative electrode terminal, and the charged object is charged.

In some embodiments, a third cavity is arranged inside the positive electrode terminal, the third cavity is communicated with the first cavity, and the first liquid inlet is arranged on the positive electrode terminal and is communicated with the third cavity; the negative electrode terminal is internally provided with a fourth cavity, the fourth cavity is communicated with the second cavity, and the second liquid inlet is arranged on the negative electrode terminal and is communicated with the fourth cavity.

It can be seen that the first cooling circuit for dissipating heat from the positive cable comprises a third cavity inside the positive terminal, thereby dissipating heat from the positive terminal; the second cooling loop for radiating the negative electrode cable comprises a fourth cavity inside the negative electrode terminal, so that the negative electrode terminal is radiated, and the radiating comprehensiveness and the radiating effect of the positive electrode cable and the negative electrode cable in the connecting cable of the charging gun are improved.

In some embodiments, the outside of the positive electrode cable is coated with an insulating protective layer; and/or the outer side of the negative electrode cable is coated with an insulating protection layer, so that the positive electrode cable and/or the negative electrode cable can be better insulated and protected.

In a second aspect, the application further provides a charging pile, which comprises a shell, a first liquid cooling box and a second liquid cooling box, wherein the first liquid cooling box and the second liquid cooling box are positioned in the shell, and cooling mediums are stored in the first liquid cooling box and the second liquid cooling box; the first liquid cooling box comprises a first liquid supply port and a first liquid return port, the first liquid supply port is used for being connected with a first liquid inlet in the charging gun according to the first aspect, and the first liquid return port is used for being connected with a first liquid outlet in the charging gun; the second liquid cooling box comprises a second liquid supply port and a second liquid return port, wherein the second liquid supply port is used for being connected with a second liquid inlet in the charging gun, and the second liquid return port is used for being connected with a second liquid outlet in the charging gun. The cooling medium may be, for example, a non-insulating liquid.

In the scheme, the first liquid cooling tank and the second liquid cooling tank are not communicated, namely, the cooling medium stored in the first liquid cooling tank and the cooling medium stored in the second liquid cooling tank are not mixed. That is, the first liquid cooling box is only communicated with the first liquid inlet and the first liquid outlet of the heat dissipation of the positive electrode cable through the first liquid supply port and the first liquid return port of the first liquid cooling box, and then the first liquid cooling box and the positive electrode cable form a first cooling loop for conveying cooling medium. Similarly, the second liquid cooling box is only communicated with the second liquid inlet and the second liquid outlet of the heat dissipation of the negative electrode cable through the second liquid supply port and the second liquid return port of the second liquid cooling box, and then the second liquid cooling box and the negative electrode cable form a second cooling loop for conveying cooling media. And then realize that positive cable and negative pole cable dispel the heat respectively, avoid positive pole electron that positive cable carried at the during operation and negative pole cable carried at the during operation negative pole electron formation current path and take place the short circuit, guarantee the security of rifle work that charges.

In some embodiments, the charging stake further includes a first circulation pump and a second circulation pump; the first liquid supply port is connected with a first liquid inlet in the charging gun through the first circulating pump, and the first circulating pump is used for enabling a cooling medium of the first liquid cooling box to circulate in the first channel in the positive electrode cable in the charging gun; the second liquid supply port is connected with a second liquid inlet in the charging gun through a second circulating pump, and the second circulating pump is used for enabling cooling medium of the second liquid cooling box to circulate in the second channel in the negative electrode cable in the charging gun.

In the scheme, the circulating pump is used for providing flowing power of the cooling medium and needs to be in direct contact with the cooling medium, so that flowing power is provided for the cooling medium of the first liquid cooling tank and the cooling medium of the second liquid cooling tank through the first circulating pump and the second circulating pump respectively, the cooling medium of the first liquid cooling tank and the cooling medium of the second liquid cooling tank are prevented from being mixed, and therefore positive electrode electrons carried by the positive electrode cable and negative electrode electrons carried by the negative electrode cable during operation are prevented from forming a current path to cause short circuit, and the safety of the operation of the charging gun is ensured.

In some embodiments, the charging stake further includes a first heat sink and a second heat sink; the first liquid return port is connected with a first liquid outlet in the charging gun through the first radiator, and the first radiator is used for cooling the cooling medium flowing out of the first liquid outlet and flowing the cooled cooling medium back to the first liquid cooling box; the second liquid return port is connected with a second liquid outlet in the charging gun through the second radiator, and the second radiator is used for cooling the cooling medium flowing out of the second liquid outlet and flowing the cooled cooling medium back to the second liquid cooling box.

In the above scheme, the radiator is used for cooling the cooling medium and needs to be in direct contact with the cooling medium, so that the cooling medium of the first liquid cooling box and the cooling medium of the second liquid cooling box are cooled respectively through the first radiator and the second radiator, the cooling medium of the first liquid cooling box and the cooling medium of the second liquid cooling box are prevented from being mixed, and therefore the positive electrode electrons carried by the positive electrode cable and the negative electrode electrons carried by the negative electrode cable during operation are prevented from forming a current path to generate a short circuit, and the safety of the operation of the charging gun is ensured.

In a third aspect, the present application also provides a charging system comprising a charging gun as described in the first aspect and a charging post as described in the second aspect. Since the charging system herein includes the charging gun described in the first aspect and the charging post described in the second aspect, the technical effects that may be brought about by any possible implementation of the first aspect or the second aspect are also provided, and the description is omitted here.

Drawings

Fig. 1 is a schematic diagram of a charging system according to an exemplary embodiment of the present application;

FIG. 2 is a schematic diagram of a connection cable according to an exemplary embodiment of the present application;

Fig. 3 is a schematic diagram of a charging gun according to an exemplary embodiment of the present application;

fig. 4 is a schematic diagram of a charging gun according to an exemplary embodiment of the present application;

Fig. 5a is a schematic diagram of an anode cable 410 according to an exemplary embodiment of the present application;

Fig. 5b is a schematic diagram of a negative cable 420 according to an exemplary embodiment of the present application;

fig. 6 is a schematic diagram of a charging pile 320 according to an exemplary embodiment of the present application;

Fig. 7 is a schematic diagram of a charging pile 320 according to an exemplary embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The plurality of the embodiments of the present application is greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.

In daily life, with the improvement of travel requirements, automobiles are more and more, and the use of a plurality of fuel automobiles not only aggravates the use of some non-renewable resources, but also pollutes the environment due to tail gas emission. Therefore, in order to reduce the use of non-renewable resources, improve the use rate of non-renewable resources, reduce environmental pollution, new energy automobiles have been generated. Among them, the new energy vehicle is a vehicle using other fuel than the conventional fuel, such as an electric vehicle or the like.

Taking an electric automobile as an example, the electric automobile uses a vehicle-mounted power supply as power, and uses a motor to drive wheels to run, and the main energy source is electric energy. Therefore, as the charging power of the electric vehicle increases, the charging connector power used on the charging post for charging the battery of the electric vehicle also increases, which results in an increase in the amount of heat generated by the charging connector. For example, the charging efficiency of the electric automobile is improved by increasing the charging current of the charging gun of the electric automobile, so that the power of the charging gun is increased and the heat consumption is increased. Therefore, how to cool the charging connector by heat dissipation becomes a key issue for increasing the charging power.

Referring to fig. 1, fig. 1 is a schematic diagram of a charging system to which an embodiment of the present application may be applied. The charging system includes a charging gun 110 and a charging post 120. The charging gun 110 comprises a charging gun head 111 and a connecting cable 112, and the charging pile 120 comprises a casing 121, and a power supply device 122 and a cold source device 123 which are arranged inside the casing 121. Wherein, a cooling system can be arranged in the charging gun head 111, and the cooling system can be used for radiating heat of the charging gun head 111; the power supply device 122 may be used to provide electric energy to the charging gun head 111 through the connection cable 112, and the cold source device 123 may provide a cooling medium to a cooling system in the charging gun head 111. For example, the cooling medium may also be referred to as a cooling liquid, and the cold source device 123 may include a liquid cooling tank and a circulation pump, where the circulation pump may be used to pump the cooling liquid in the liquid cooling tank into the cooling system in the charging gun head 111 for cooling circulation, thereby achieving the effect of cooling and heat dissipation. Of course, in other embodiments, the cooling medium may be a cooling gas or a gas-liquid mixture, which is not limited herein. The charging device provided by the embodiment of the application is installed in public buildings, such as office buildings, malls, public parking lots and the like, or can be installed in parking lots or charging stations of residential communities to charge various types of electric automobiles, and is not particularly limited herein.

Referring to fig. 2 based on fig. 1, the charging connection cable may be a power line, a signal line, a power line, or the like. Illustratively, the connection cable includes a positive cable 212a and a negative cable 212b that form a charging loop with the charging gun head 111. The connection cable further includes a liquid cooling pipeline 213a and a liquid cooling pipeline 213b, wherein the liquid cooling pipeline 213a and the liquid cooling pipeline 213b are a liquid inlet pipe of cooling liquid and a liquid outlet pipe of cooling liquid, respectively. The liquid cooling pipes 213a and 213b may be hollow insulating pipes, and the insulating pipes are in heat-conducting contact with the positive electrode cable 212a and the negative electrode cable 212b (such as the insulating pipes are attached to the positive electrode cable and the negative electrode cable), and based on the cooling liquid flowing in the liquid cooling pipes 213a and 213b, the insulating pipes absorb the heat generated during the operation of the positive electrode cable 212a and the negative electrode cable 212b, so as to indirectly contact with the positive electrode cable 212a and the negative electrode cable 212b through the insulating pipes, thereby performing heat dissipation and cooling on the positive electrode cable 212a and the negative electrode cable 212 b. By way of example, fig. 3 further includes a circulation pump 113, a radiator 114 and a liquid cooling tank 115, the temperature of the cooling liquid in the liquid cooling pipeline 213a and the liquid cooling pipeline 213b increases after absorbing the heat generated by the positive cable 212a and the negative cable 212b, the high-temperature cooling liquid flows into the radiator 114 first, is cooled by the external air in the radiator 114, thereby reducing the temperature, then flows the cooled cooling liquid into the liquid cooling tank 115, and flows the cooled cooling liquid in the liquid cooling tank 115 into the liquid cooling pipeline 213a through the circulation pump 113, thereby completing a cooling cycle, and realizing continuous cooling and heat dissipation of the connecting cable.

In still another embodiment, the positive electrode cable of the connecting cable is externally covered with an insulating tube, the negative electrode cable of the connecting cable is covered with an insulating tube, then the positive electrode cable covered with the insulating tube and the negative electrode cable covered with the insulating tube are immersed in the cooling liquid, and heat generated when the positive electrode cable and the negative electrode cable of the connecting cable work is absorbed through the insulating tube, so that cooling and heat dissipation of the positive electrode cable and the negative electrode cable of the connecting cable are realized.

In the above embodiment, the cooling liquid may be a non-insulating liquid, because the cooling liquid is indirectly brought into heat-conducting contact with the positive electrode cable and the negative electrode cable of the connection cable through the insulating tube, insulation between the cooling liquid and the positive electrode cable and the negative electrode cable of the connection cable can be ensured, and the positive electrode cable and the negative electrode cable are prevented from being short-circuited by the cooling liquid. However, in the cooling mode of indirect contact of the insulating tube, there are problems of low cooling efficiency, poor heat dissipation effect and the like caused by low heat conductivity coefficient corresponding to the insulating material of the insulating tube, and the design cost of the liquid cooling pipeline is high.

In some embodiments, if the cooling fluid is an insulating fluid, such as silicone oil, fluorinated fluid, and the like. The positive cable and the negative cable of the connecting cable can be directly immersed in the cooling liquid, so that the cooling liquid is directly contacted with the positive cable and the negative cable of the connecting cable, and then heat generated during working of the positive cable and the negative cable of the connecting cable is absorbed, and cooling and heat dissipation of the positive cable and the negative cable of the connecting cable are realized. However, this method has problems that the cooling efficiency of the positive electrode cable and the negative electrode cable is low due to the poor heat radiation capability of the coolant, and some insulating cooling mediums are not suitable due to their own characteristics, such as high viscosity and high working pressure of silicone oil, and the cost of the fluorinated solution is high and the industry is not mature.

Therefore, the application provides the charging gun, the charging pile and the charging system, which are used for realizing that a cooling medium of non-insulating liquid is directly contacted with the positive cable and the negative cable of the connecting cable, ensuring that the positive cable and the negative cable are not in short circuit, and improving the cooling efficiency and the heat dissipation effect of the positive cable and the negative cable.

Referring to fig. 3, fig. 3 is a schematic diagram of a charging gun according to an exemplary embodiment of the present application. The charging gun 310 comprises a gun head 311 and a connecting cable 312 connected with the gun head 311, wherein the gun head 311 is used for being connected with a charged object, and the connecting cable 312 is used for being connected with a charging pile 320; the charging stake 320 includes a first liquid cooling tank 321 and a second liquid cooling tank 322. It will be appreciated that the first liquid cooling tank 321 and the second liquid cooling tank 322 are disposed on the charging pile 320, for storing the cooling medium, and that the first liquid cooling tank 321 includes a first liquid supply port and a first liquid outlet port for forming a circulation flow of the cooling medium, and the second liquid cooling tank 322 includes a second liquid supply port and a second liquid outlet port for forming a circulation flow of the cooling medium. Illustratively, the charging pile 320 further includes a circulation pump for flowing the cooling medium stored in the first and second liquid cooling tanks 321 and 322 and a radiator for cooling the cooling medium stored in the first and second liquid cooling tanks 321 and 322, which may be a non-insulating liquid such as a mixed solution of water and glycol. The charging gun 310 is described below.

Fig. 4 is a schematic diagram of a charging gun according to an embodiment of the present application. The connection cable 312 includes therein a positive cable 410 and a negative cable 420. The positive cable 410 has a first channel therein, and the first channel is connected and communicated with the first liquid supply port and the first liquid return port of the first liquid cooling tank 421; the negative cable 420 has a second channel therein in communication with a second supply port and a second return port of the second liquid cooling tank 322. The cooling medium of the first liquid cooling tank 321 circulates in the first channel in the positive cable 410, the cooling medium of the second liquid cooling tank 322 circulates in the second channel in the negative cable 420, and then the cooling medium of the first liquid cooling tank 321 absorbs heat generated when the positive cable 410 works, so as to cool and dissipate heat of the positive cable 410, and the cooling medium of the second liquid cooling tank 322 absorbs heat generated when the negative cable 420 works, so as to cool and dissipate heat of the negative cable 420. It will be appreciated that the cooling medium of the first liquid cooling tank 321 circulates in a first channel in the positive cable 410 based on the power provided by the circulation pump, and the cooling medium of the second liquid cooling tank 322 circulates in a second channel in the negative cable 420 based on the power provided by the circulation pump. The cooling medium flowing out of the first channel in the positive cable 410 flows back to the first liquid cooling tank 321 through the radiator, and the cooling medium flowing out of the second channel in the negative cable 420 flows back to the second liquid cooling tank 322 through the radiator, so that the cooling medium is cooled, and the recycling of the cooling medium is realized. Illustratively, the radiator and the circulation pump are described below in fig. 6 and 7.

For example, referring to fig. 5a, a schematic diagram of a positive cable 410 according to an embodiment of the present application is shown, where the positive cable 410 includes a positive transmission cable 411, a positive terminal 412 and a first connector 413. The positive electrode transmission cable 411 has a first cavity 414, the positive electrode terminal 412 is disposed at one end (right end in the drawing) of the positive electrode transmission cable 411, and the first connector 413 is disposed at the other end (left end in the drawing) of the positive electrode transmission cable 411. The third cavity 415 is disposed inside the positive terminal 412, the first liquid inlet 416 is disposed on the positive terminal 412, and the third cavity 415 is communicated with the first liquid inlet 416, and the third cavity 415 is further communicated with the first cavity 414 of the positive transmission cable 411, i.e. the first cavity 414 of the positive transmission cable 411, the third cavity 415 of the positive terminal 412 and the first liquid inlet 416 are mutually communicated. The first connector 413 is internally provided with a first liquid outlet 417, and the first liquid outlet 417 is communicated with the first cavity 414 of the positive transmission cable 411. That is, the first cavity 414 of the positive electrode transmission cable 411, the third cavity 415 of the positive electrode terminal 412, the first liquid inlet 416, and the first liquid outlet 417 of the first connector 413 are communicated with each other, thereby forming a first channel for transmitting the cooling medium.

Referring to fig. 5b, a schematic diagram of a negative cable 420 according to an embodiment of the present application is provided, where the negative cable 420 includes a negative transmission cable 421, a negative terminal 422, and a second connection member 423. The negative electrode transmission cable 421 has a second cavity 424, the negative electrode terminal 422 is disposed at one end (right end in the drawing) of the negative electrode transmission cable 421, and the second connection member 423 is disposed at the other end (left end in the drawing) of the negative electrode transmission cable 421. The negative electrode terminal 422 is internally provided with a fourth cavity 425, and the negative electrode terminal 422 is provided with a second liquid inlet 426, and the fourth cavity 425 is communicated with the second cavity 424 of the negative electrode transmission cable 421, namely, the second cavity 424 of the negative electrode transmission cable 421, the fourth cavity 425 of the negative electrode terminal 422 and the second liquid inlet 426 are mutually communicated. The second connecting piece 423 is internally provided with a second liquid outlet 427, and the second liquid outlet 427 is communicated with the second cavity 424 of the negative electrode transmission cable 421. That is, the second cavity 424 of the negative electrode transmission cable 421, the fourth cavity 425 of the positive electrode terminal 422, the second liquid inlet 426, and the second liquid outlet 427 of the second connection member 423 are communicated with each other, thereby forming a second passage for transmitting the cooling medium.

Based on the above-mentioned scheme shown in fig. 5a and 5b, the first liquid supply port of the first liquid cooling tank 321 is communicated with the first liquid inlet 416 provided on the positive terminal 412, and the first liquid outlet 417 provided inside the first connector 413 is communicated with the first liquid return port of the first liquid cooling tank 321, so as to form a first cooling circuit only for dissipating heat of the positive cable 410. The second liquid supply port of the second liquid cooling tank 322 is communicated with the second liquid inlet 426 arranged on the negative electrode terminal 422, and the second liquid outlet 427 arranged inside the second connecting piece 423 is communicated with the second liquid return port of the second liquid cooling tank 322, so that a second cooling loop only used for radiating heat of the negative electrode cable 420 is formed. In this way, the cooling medium of the first liquid cooling tank 321 circulates in the first channel in the positive cable 410, the cooling medium of the second liquid cooling tank 322 circulates in the second channel in the negative cable 420, the cooling medium of the first liquid cooling tank 321 absorbs heat generated when the positive cable 410 works, the positive cable 410 is cooled and radiated, and the cooling medium of the second liquid cooling tank 322 absorbs heat generated when the negative cable 420 works, and the negative cable 420 is cooled and radiated.

Based on the above description, the positive electrode terminal 412 and the negative electrode terminal 422 are pin terminals of the gun head of the charging gun, and the positive electrode terminal 412 and the negative electrode terminal 422 are connected to the positive electrode transmission cable 411 and the negative electrode transmission cable 421, respectively, corresponding to the connection cable 312 being connected to the gun head 311. The positive terminal 412 and the negative terminal 422 are used for being inserted into insertion holes which are connected with a charged object and are matched with the positive terminal 412 and the negative terminal 422, so that the gun head 311 is connected with the charged object, and the charged object is charged.

It can be appreciated that the first liquid inlet 416 formed on the first liquid supply port of the first liquid cooling tank 321 and the positive electrode terminal 412 are communicated, the first liquid outlet 417 formed inside the first connecting member 413 is connected and communicated with the first liquid return port of the first liquid cooling tank 321, the second liquid supply port of the second liquid cooling tank 322 is communicated with the second liquid inlet 426 formed on the negative electrode terminal 422, and the second liquid outlet 427 formed inside the second connecting member 423 is connected and communicated with the second liquid return port of the second liquid cooling tank 322 in a corresponding communication manner, such as a manner of plastic hose, so as to realize circulation of cooling medium. The cooling medium may be a non-insulating liquid to enhance the heat dissipation effect of the positive and negative cables 410 and 420.

In addition, based on the above fig. 5a and fig. 5b, it can be seen that the outside of the positive electrode cable 410 may be further coated with an insulating protection layer 500, and/or the outside of the negative electrode cable 420 may be further coated with an insulating protection layer 500, so as to prevent the positive electrode cable 410 and the negative electrode cable 420 from leaking electricity during operation, and ensure the safety of the operation of the charging gun.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a charging pile 320 according to an embodiment of the present application. Comprises a shell 323, a first liquid cooling box 321 and a second liquid cooling box 322 which are positioned in the shell 323, wherein cooling mediums are stored in the first liquid cooling box 321 and the second liquid cooling box 322; the cooling medium may be a non-insulating liquid. The charging stake 320 also includes a cooling device 324 and a power source, and the cooling device 324 may include a radiator and a circulation pump.

Based on the foregoing fig. 3 to 6, fig. 7 is a schematic diagram of a charging pile 320 according to an exemplary embodiment of the present application. The first liquid cooling tank 321 includes a first liquid supply port 321a and a first liquid return port 321b, where the first liquid supply port 321a is communicated with a first liquid inlet 416 provided on the positive terminal 412 of the positive cable 410, and the first liquid return port 321b is communicated with a first liquid outlet 415 provided inside the first connecting member 413 of the positive cable 410. The second liquid cooling tank 322 includes a second liquid supply port 322a and a second liquid return port 322b, the second liquid supply port 322a is communicated with a second liquid inlet 426 arranged on the negative terminal 422 of the negative cable 420, and the second liquid return port 322b is communicated with a second liquid outlet 427 arranged inside the second connecting piece 423 of the negative cable 420.

In order to circulate the cooling medium in the first passage in the positive electrode cable 410 and the cooling medium in the second passage in the negative electrode cable 420, the charging pile may further include a first circulation pump 721 and a second circulation pump 722. The first liquid supply port 321a of the first liquid cooling tank 321 is connected to the first liquid inlet 416 of the positive cable 410 through the first circulating pump 721. For example, the first liquid supply port 321a of the first liquid cooling tank 321 is connected to one end of the first circulation pump 721 through a plastic hose, and the first liquid inlet 416 of the positive electrode cable 410 is connected to the other end of the first circulation pump 721, so that when the first circulation pump 721 is operated, the cooling medium of the first liquid cooling tank 321 is pumped out from the first liquid supply port 321a, and the pumped cooling medium flows to the first liquid inlet 416 of the positive electrode cable 410, so that the cooling medium of the first liquid cooling tank 321 flows in the first channel in the positive electrode cable 410 in the charging gun 310. The second liquid supply port 322a of the second liquid cooling tank 322 is connected to the second liquid inlet 426 of the negative cable 420 through the second circulation pump 722. For example, the second liquid supply port 322a of the second liquid cooling tank 322 is connected to one end of the second circulation pump 722 through a plastic hose, and the second liquid inlet 426 of the negative electrode cable 420 is connected to the other end of the second circulation pump 722, so that when the second circulation pump 722 is operated, the cooling medium of the second liquid cooling tank 322 is pumped out from the second liquid supply port 322a, and the pumped cooling medium flows to the second liquid inlet 426 of the negative electrode cable 420, so that the cooling medium of the second liquid cooling tank 322 flows in the second channel in the negative electrode cable 420 in the charging gun 310.

In order to cool the cooling medium absorbing heat, the anode cable 410 and the cathode cable 420 are continuously cooled and radiated, and the charging pile may further include a first radiator 711 and a second radiator 712. The first liquid return port 421b of the first liquid cooling tank 321 is connected to the first liquid outlet 417 of the charging gun 410 through the first heat radiator 711. For example, the first liquid return port 421b of the first liquid cooling tank 321 is connected to one end of the first radiator 711 by a plastic hose, the first liquid outlet 417 of the positive cable 410 is connected to the other end of the first radiator 711, the cooling medium flowing in the first channel in the positive cable 410 flows into the first radiator 711 by the power provided by the first circulation pump 721, and the cooling medium flowing in the first channel in the positive cable 410 absorbs the heat generated when the positive cable 410 works, so that the temperature of the cooling medium is high, the cooling medium at a high temperature flows into the first radiator 711, then the cooling medium at a high temperature is cooled by the first radiator 711, and then the cooled cooling medium flows back into the first liquid cooling tank 321.

The second liquid return port 322b of the second liquid cooling tank 322 is connected to the second liquid outlet 427 of the charging gun 310 through the second radiator 712. For example, the second liquid return port 322b of the second liquid cooling tank 322 is connected to one end of the second radiator 712 through a plastic hose, the second liquid outlet 427 of the negative electrode cable 420 is connected to the other end of the second radiator 712, the cooling medium flowing in the second channel in the negative electrode cable 420 flows into the second radiator 712 by the power provided by the second circulation pump 722, and the cooling medium flowing in the second channel in the negative electrode cable 420 absorbs the heat generated when the negative electrode cable 420 works, so that the temperature of the cooling medium is high, after the cooling medium at high temperature flows into the second radiator 712, the cooling medium at high temperature is cooled by the second radiator 712, and then the cooled cooling medium flows back into the second liquid cooling tank 322.

It is understood that the cooling mode of the first heat sink 711 and the second heat sink 712 may be an air cooling mode. Illustratively, the first fan blows low-temperature air of the external environment to the first radiator 711, so that the external low-temperature air dissipates heat of the high-temperature cooling medium flowing through the first radiator 711, and further cools the high-temperature cooling medium. Similarly, the second fan blows the low-temperature air of the external environment to the second radiator 712, so that the external low-temperature air dissipates the heat of the high-temperature cooling medium flowing through the second radiator 712, and further cools the high-temperature cooling medium. That is, when the cooling medium flowing from the first channel in the positive electrode cable 410 flows back to the first liquid cooling box, the cooling medium is cooled by the first radiator 711, so that the cooling medium in the first liquid cooling box is prevented from being improved, and the subsequent heat dissipation effect on the positive electrode cable 410 is ensured; similarly, when the cooling medium flowing from the second channel in the negative electrode cable 420 flows back to the second liquid cooling tank, the cooling medium is cooled by the second radiator 712, so that the cooling medium in the second liquid cooling tank is prevented from being improved, and the subsequent heat dissipation effect on the negative electrode cable 420 is ensured.

In one possible embodiment, since the cooling medium does not contact the blower while circulating, the blower does not affect the electrical insulation performance between the positive and negative cables 410 and 420, and thus the first and second heat sinks may share one blower, thereby reducing the cost of the charging apparatus.

In some embodiments, the charging device may further include a sensing device, for example, a liquid level sensor is disposed in the first liquid cooling tank 321 and the second liquid cooling tank 322, and is used for detecting the liquid level condition of the cooling medium in the liquid cooling tank, so as to determine whether the capacity of the cooling medium meets the use requirement. And if a liquid temperature sensor is arranged in the liquid cooling loop (such as between the liquid cooling box and the circulating pump), the liquid temperature sensor is used for monitoring the real-time temperature of the cooling medium in the working process, so that the cooling efficiency, fault warning and the like can be adjusted in a mode of adjusting the flow rate of the cooling medium through the circulating pump, adjusting the wind speed through a fan and the like according to the real-time temperature.

In some embodiments, the present application further provides a charging system, including the charging gun and the charging post shown in fig. 4 to 7. The charging system configuration may be as shown with reference to fig. 6.

Based on the above description, because the first liquid cooling box corresponding to the positive cable and the second liquid cooling box corresponding to the negative cable are mutually independent, the positive cable and the negative cable in the charging system are cooled and radiated independently, no electrical connection exists, and electrical insulation between the positive cable and the negative cable is realized. Based on this, the cooling medium that first liquid cooling tank and second liquid cooling tank stored can be non-insulating liquid such as ethylene glycol aqueous solution, uses non-insulating liquid to directly contact with positive pole cable and negative pole cable under the realization positive pole cable and the negative pole cable do not take place the short circuit the condition, need not to adopt extra insulating tube to insulate, not only the cost is reduced, has still improved the radiating effect of positive pole cable and negative pole cable.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (10)

1. The charging gun is characterized by comprising a gun head and a connecting cable connected with the gun head, wherein the gun head is used for being connected with a charged object, and the connecting cable is used for being connected with a charging pile;

The connecting cable comprises a positive cable and a negative cable;

The positive electrode cable is provided with a first cavity, a first liquid inlet and a first liquid outlet, wherein the first liquid inlet and the first liquid outlet are communicated with the first cavity to form a first channel for transmitting cooling medium; the first liquid inlet is used for being connected with a first liquid supply port of a first liquid cooling box in the charging pile, and the first liquid outlet is used for being connected with a first liquid return port of the first liquid cooling box;

The negative electrode cable is provided with a second cavity, a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are communicated with the second cavity to form a second channel for conveying cooling medium; the second liquid inlet is used for being connected with a second liquid supply port of a second liquid cooling box in the charging pile, and the second liquid outlet is used for being connected with a second liquid return port of the second liquid cooling box.

2. The charging gun of claim 1, wherein the positive cable comprises a positive transmission cable, a positive terminal, and a first connection; the positive electrode transmission cable is provided with the first cavity, the positive electrode terminal is arranged at one end of the positive electrode transmission cable, and the first connecting piece is arranged at the other end of the positive electrode transmission cable;

The negative electrode cable comprises a negative electrode transmission cable, a negative electrode terminal and a second connecting piece; the negative electrode transmission cable is provided with the second cavity, the negative electrode terminal is arranged at one end of the negative electrode transmission cable, and the second connecting piece is arranged at the other end of the negative electrode transmission cable;

The positive terminal and the negative terminal are used for being connected with the charged object, and the first connecting piece and the second connecting piece are used for being connected with the charging pile.

3. The charging gun according to claim 2, wherein a third cavity is arranged inside the positive electrode terminal, the third cavity is communicated with the first cavity, and the first liquid inlet is arranged on the positive electrode terminal and is communicated with the third cavity;

The negative electrode terminal is internally provided with a fourth cavity, the fourth cavity is communicated with the second cavity, and the second liquid inlet is arranged on the negative electrode terminal and is communicated with the fourth cavity.

4. A charging gun according to any one of claims 1 to 3, wherein the outside of the positive electrode cable is covered with an insulating protective layer; and/or

And the outer side of the negative electrode cable is coated with an insulating protection layer.

5. The charging gun of claim 1, wherein the cooling medium is a non-insulating liquid.

6. The charging pile is characterized by comprising a shell, a first liquid cooling box and a second liquid cooling box, wherein the first liquid cooling box and the second liquid cooling box are positioned in the shell, and cooling mediums are stored in the first liquid cooling box and the second liquid cooling box;

The first liquid cooling box comprises a first liquid supply port and a first liquid return port, the first liquid supply port is used for being connected with a first liquid inlet in the charging gun according to any one of claims 1-4, and the first liquid return port is used for being connected with a first liquid outlet in the charging gun;

The second liquid cooling box comprises a second liquid supply port and a second liquid return port, wherein the second liquid supply port is used for being connected with a second liquid inlet in the charging gun, and the second liquid return port is used for being connected with a second liquid outlet in the charging gun.

7. The charging stake of claim 6, wherein the charging stake further includes a first circulation pump and a second circulation pump;

The first liquid supply port is connected with a first liquid inlet in the charging gun through the first circulating pump, and the first circulating pump is used for enabling a cooling medium of the first liquid cooling box to circulate in the first channel in the positive electrode cable in the charging gun;

The second liquid supply port is connected with a second liquid inlet in the charging gun through a second circulating pump, and the second circulating pump is used for enabling cooling medium of the second liquid cooling box to circulate in the second channel in the negative electrode cable in the charging gun.

8. The charging pile according to claim 6 or 7, characterized in that the charging pile further comprises a first heat sink and a second heat sink;

The first liquid return port is connected with a first liquid outlet in the charging gun through the first radiator, and the first radiator is used for cooling the cooling medium flowing out of the first liquid outlet and flowing the cooled cooling medium back to the first liquid cooling box;

The second liquid return port is connected with a second liquid outlet in the charging gun through the second radiator, and the second radiator is used for cooling the cooling medium flowing out of the second liquid outlet and flowing the cooled cooling medium back to the second liquid cooling box.

9. A charging pile according to claim 6, characterised in that the cooling medium is a non-insulating liquid.

10. A charging system comprising a charging gun according to any one of claims 1-5 and a charging post according to any one of claims 6-9.