Patent Description:
With rapid development of the new energy vehicle industry, a range-per-charge of an electric vehicle continuously increases, and a battery capacity also increases accordingly. Therefore, a problem of a charging speed needs to be resolved by increasing charging power to implement fast charging. However, a higher requirement is also imposed on heat dissipation of a charging connector.

Currently, a liquid cooling technology is usually used to perform heat dissipation processing on the charging connector. In a process of charging the electric vehicle, a wire cable of the charging connector may be crushed by a vehicle tire, and a circulation pipe in the charging connector is vulnerable to being damaged. Consequently, a cooling working medium in the circulation pipe leaks, and the charging wire cable is damaged, causing a series of security problems. Therefore, how to provide a charging connector to improve security and reliability of the charging connector in a charging process has become a technical problem that needs to be urgently resolved in the art.

<CIT> describes an electric vehicle charging assembly comprising: an electric vehicle charging cable comprising: a grounding unit; at least one communication unit; a pair of power units each including a conductor and an insulating layer covering the conductor; a cooling unit configured to cool the conductor and included in the conductor of each of the power units, the cooling unit including a cooling tube and a cooling channel which is provided in the cooling tube and in which a cooling fluid flows; and a collection unit including a collection tube in which a return channel is provided to collect the cooling fluid supplied through the cooling unit; and an electric vehicle charging connector comprising: a pair of power terminals each including a connecting part to be connected to a connector connection unit included in an electric vehicle and a conductor connection part into which the conductor of the electric vehicle charging cable is inserted to be connected to the connector connection unit; and a heat sink configured to absorb heat generated in the conductor connection part of each of the power terminals, and including therein a return channel for collecting the cooling fluid flowing through the cooling unit and supplying the cooling fluid to the collection unit.

Embodiments of this application provide a charging connector and a charging pile, to improve security and reliability of the charging connector.

According to a first aspect, a charging connector is provided. The charging connector includes a charging terminal, a cable, a circulation pipe, and a hydraulic buffer apparatus. The charging terminal is connected to the cable. The circulation pipe is configured to communicate with a cold source apparatus to form a cooling loop. The hydraulic buffer apparatus communicates with the circulation pipe. The hydraulic buffer apparatus is configured to relieve pressure in the circulation pipe when the pressure in the circulation pipe is greater than a preset threshold.

According to the charging connector provided in this application, the hydraulic buffer apparatus is disposed in the charging connector. When the pressure in the circulation pipe in the charging connector is greater than the preset threshold, a fluid flowing into the hydraulic buffer apparatus buffers the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of a wire cable, to improve security and reliability of the charging connector.

With reference to the first aspect, in a possible implementation of the first aspect, the circulation pipe includes an inflow pipe and an outflow pipe; and the inflow pipe communicates with the hydraulic buffer apparatus, or the outflow pipe communicates with the hydraulic buffer apparatus, or both the inflow pipe and the outflow pipe communicate with the hydraulic buffer apparatus. When the pressure in the circulation pipe in the charging connector is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus through the inflow pipe or the outflow pipe or the inflow pipe and the outflow pipe buffers the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of the wire cable, to improve security and reliability of the charging connector.

With reference to the first aspect, in a possible implementation of the first aspect, the charging connector further includes a heat exchange pool, the heat exchange pool is attached to the charging terminal, and the heat exchange pool is connected to the circulation pipe. The heat exchange pool is disposed in the charging connector, the heat exchange pool is attached to the charging terminal, and the heat exchange pool is connected to the circulation pipe, so that heat dissipation effect of the charging terminal can be improved.

With reference to the first aspect, in a possible implementation of the first aspect, the heat exchange pool is connected to the hydraulic buffer apparatus. In this way, when the pressure in the circulation pipe is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus from the heat exchange pool buffers the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of the wire cable, to improve security and reliability of the charging connector in a charging process. In addition, the structure is simple, and is convenient for processing and assembly of the charging connector.

With reference to the first aspect, in a possible implementation of the first aspect, a three-way adapter is disposed in the inflow pipe and/or the outflow pipe, a first end of the three-way adapter communicates with the heat exchange pool, a second end of the three-way adapter communicates with the cold source apparatus, and a third end of the three-way adapter communicates with the hydraulic buffer apparatus.

According to the charging connector provided in this application, the three-way adapter is disposed in the inflow pipe and/or the outflow pipe in the circulation pipe to communicate with the hydraulic buffer apparatus, so that when the pressure in the circulation pipe is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus may buffer the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of the wire cable, to improve security and reliability of the charging connector in the charging process. In addition, the structure design is simple, and there is no need to affect the structure of the heat exchange pool.

With reference to the first aspect, in a possible implementation of the first aspect, at least one liquid inlet and at least one liquid outlet are disposed on a side that is of the heat exchange pool and that is away from the charging terminal, the at least one liquid inlet is in a one-to-one correspondence with at least one inflow pipe, and the at least one liquid outlet is in a one-to-one correspondence with at least one outflow pipe. In this way, the at least one liquid inlet and the at least one liquid outlet are disposed on the side that is of the heat exchange pool and that is away from the charging terminal. Correspondingly, the at least one inflow pipe and the at least one outflow pipe need to be disposed in the circulation pipe, the at least one liquid inlet is in a one-to-one correspondence with the at least one inflow pipe, and the at least one liquid outlet is in a one-to-one correspondence with the at least one outflow pipe. Therefore, heat exchange efficiency of the fluid in the circulation pipe may be improved, and heat dissipation effect of the charging terminal may be effectively improved.

With reference to the first aspect, in a possible implementation of the first aspect, the hydraulic buffer apparatus includes a piston and a housing having an opening, the housing includes a first cavity and a second cavity, the piston is disposed in the housing and is located between the first cavity and the second cavity, a fluid in the circulation pipe enters the first cavity through the opening, and the fluid pushes the piston to compress the second cavity when the pressure in the circulation pipe is greater than the preset threshold. In this way, the fluid flowing into the first cavity in the hydraulic buffer apparatus pushes the piston to compress the second cavity when the pressure in the circulation pipe is greater than the preset threshold, to buffer the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of the wire cable.

With reference to the first aspect, in a possible implementation of the first aspect, the hydraulic buffer apparatus further includes a retractable corrugated structure, and the corrugated structure is disposed between the opening and the piston to form the first cavity. In this application, the retractable corrugated structure is disposed in the hydraulic buffer apparatus, and the corrugated structure forms the first cavity between the opening of the housing and the piston, to improve sealing effect of the first cavity and prevent a fluid in the first cavity from entering the second cavity.

With reference to the first aspect, in a possible implementation of the first aspect, an elastic component is disposed in the second cavity, and the elastic component is connected to the piston and a wall that is of the housing and that is opposite to the piston. In this application, when the wire cable of the charging connector is crushed by a vehicle, that is, when the pressure in the circulation pipe is greater than the preset threshold, the hydraulic buffer apparatus may implement buffering on the fluid in the circulation pipe, to reduce damage to the circulation pipe or fluid leakage in the circulation pipe. Then, when the vehicle leaves the wire cable of the charging connector, that is, when the pressure in the circulation pipe is less than the preset threshold, because of elasticity of the elastic component disposed in the second cavity in the hydraulic buffer apparatus, the pressure in the circulation pipe may be restored to normal. This facilitates cyclic use of the hydraulic buffer apparatus, and helps improve security and reliability of the charging connector in the charging process.

With reference to the first aspect, in a possible implementation of the first aspect, the hydraulic buffer apparatus further includes a connection pipe, and the connection pipe is connected to the opening and the circulation pipe.

With reference to the first aspect, in a possible implementation of the first aspect, a shape of the housing is a square structure. In this application, the hydraulic buffer apparatus is disposed as a square structure, and may be stacked above the heat exchange pool, so that the hydraulic buffer apparatus is installed in the heat exchange connector, and space utilization inside a connector of the charging connector may be improved.

With reference to the first aspect, in a possible implementation of the first aspect, the charging connector further includes a pump body, the pump body communicates with the circulation pipe, and the pump body is configured to drive the fluid to flow in the circulation pipe, to improve heat exchange efficiency of the fluid in the circulation pipe, and improve heat dissipation effect of the charging terminal.

According to a second aspect, a charging pile is provided. The charging pile includes a pile body and a charging connector. The charging connector is electrically connected to the pile body through a cable. The charging connector includes a charging terminal, the cable, a circulation pipe, and a hydraulic buffer apparatus. The charging terminal is connected to the cable. The circulation pipe is configured to communicate with a cold source apparatus to form a cooling loop. The hydraulic buffer apparatus communicates with the circulation pipe. The hydraulic buffer apparatus is configured to relieve pressure in the circulation pipe when the pressure in the circulation pipe is greater than a preset threshold.

According to the charging pile provided in this application, the hydraulic buffer apparatus is disposed in the charging connector in the charging pile. When the pressure in the circulation pipe in the charging connector is greater than the preset threshold, a fluid flowing into the hydraulic buffer apparatus buffers the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of a wire cable, to improve security and reliability of the charging pile.

With reference to the second aspect, in a possible implementation of the second aspect, the circulation pipe includes an inflow pipe and an outflow pipe; and the inflow pipe communicates with the hydraulic buffer apparatus, or the outflow pipe communicates with the hydraulic buffer apparatus, or both the inflow pipe and the outflow pipe communicate with the hydraulic buffer apparatus.

Therefore, when the pressure in the circulation pipe in the charging connector in the charging pile is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus through the inflow pipe or the outflow pipe or the inflow pipe and the outflow pipe buffers the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of the wire cable, to improve security and reliability of the charging pile.

With reference to the second aspect, in a possible implementation of the second aspect, the charging pile further includes a heat exchange pool, the heat exchange pool is attached to the charging terminal, and the heat exchange pool is connected to the circulation pipe. The heat exchange pool is disposed in the charging pile, the heat exchange pool is attached to the charging terminal of the charging connector, and the heat exchange pool is connected to the circulation pipe, so that heat dissipation effect of the charging terminal can be improved.

With reference to the second aspect, in a possible implementation of the second aspect, the heat exchange pool is connected to the hydraulic buffer apparatus. In this way, when the pressure in the circulation pipe in the charging connector is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus from the heat exchange pool buffers the circulation pipe, to reduce damage to the circulation pipe caused by excessively high pressure in the circulation pipe or adverse impact of fluid leakage in the circulation pipe on the inside of the wire cable, to improve security and reliability of the charging pile in a charging process.

It should be understood that, in embodiments of this application, the accompanying drawings are not drawn according to an actual scale.

The following describes technical solutions in embodiments of this application in detail with reference to the accompanying drawings.

A charging connector is a device for implementing electric energy transmission between a charging device and an electric vehicle. Increasing a charging current in the charging connector may implement high-power charging, to meet a requirement of the electric vehicle for large-capacity fast charging. The increase of the charging current results in an increase in power consumption of the charging connector, and high heat is easily generated in a charging process. Currently, a liquid cooling technology is usually used to dissipate heat of the charging connector to reduce heat consumption. That is, a liquid cooling cycle system may be provided for the charging connector, so that a cooling liquid in the liquid cooling cycle system contacts a cable in a wire cable to perform heat exchange, to implement heat dissipation.

In some possible implementations, in a process of charging the electric vehicle, the wire cable of the charging connector is impacted by an external force (for example, being crushed by a vehicle tire), and consequently a cooling working medium in a circulation pipe in the wire cable separately diffuses to a side of a charging terminal of the charging connector and a side of a cold source apparatus of a pile body. For the side of the cold source apparatus of the pile body, the cooling working medium flowing to the cold source apparatus after being crushed by the vehicle tire is not easy to affect the cold source apparatus because of large accommodation pace of the cold source apparatus. However, for the side of the charging terminal of the charging connector, because the circulation pipe on the side has small space for accommodating the cooling working medium, the cooling working medium flowing to the side of the charging terminal of the charging connector after being crushed by the vehicle tire generates large pressure in the circulation pipe on the side in a short period of time, and is vulnerable to damaging the circulation pipe, causing leakage of the cooling working medium. Consequently, there is short circuit risk in the wire cable of the charging connector, and a security accident is vulnerable to being caused.

In view of this, embodiments of this application provide a charging connector and a charging pile, to resolve the foregoing technical problem, so that security and reliability of the charging connector in a charging process can be improved. To make the objectives, technical solutions, and beneficial effects of this application clearer, the following further describes this application in detail with reference to the accompanying drawings.

<FIG> is a schematic diagram of a structure of an example of a charging pile according to an embodiment of this application. As shown in <FIG>, the charging pile <NUM> may include a charging connector <NUM> and a charging pile <NUM>. The charging connector <NUM> is electrically connected to the charging pile <NUM>, to charge, through the charging connector <NUM>, an electric device by using electric energy stored in the charging pile <NUM>. It should be understood that a plurality of charging connectors <NUM> may alternatively be disposed in the charging pile <NUM> in this embodiment of this application. As an example, this is not limited in this embodiment of this application.

In a possible implementation, the charging connector <NUM> in this embodiment of this application may include a charging terminal <NUM>, a wire cable <NUM>, and a connector housing <NUM>. A cable <NUM> and a circulation pipe <NUM> are disposed in the wire cable <NUM>. The circulation pipe <NUM> includes an inflow pipe 122a and an outflow pipe 122b. For example, one end of the inflow pipe 122a may be connected to a cold source apparatus <NUM> of the pile body <NUM>, and one end of the outflow pipe 122b may be connected to a water pump <NUM> of the pile body <NUM>.

It should be understood that quantities of charging terminals <NUM>, inflow pipes 122a, and outflow pipes 122b in the charging connector <NUM> in this embodiment of this application may be set according to an actual requirement. For example, two charging terminals <NUM>, two inflow pipes 122a, and one outflow pipe 122b may be disposed in the charging connector <NUM>. As an example, this is not limited in this embodiment of this application.

In a possible implementation, an installation cavity is further disposed in the connector housing <NUM> of the charging connector <NUM> in this embodiment of this application, and a part of the charging terminal <NUM> may be fastened inside the installation cavity.

In a possible implementation, the charging terminal <NUM> in this embodiment of this application may be disposed in the charging connector <NUM> as a male end, to be connected to a charging socket, on the power-consuming device, that is used as a female end, or the charging terminal <NUM> may be disposed on the power-consuming device as a male end, to be connected to a charging socket, on the charging connector <NUM>, that is used as a female end. As an example, this is not limited in this embodiment of this application.

In a possible implementation, the charging pile <NUM> in this embodiment of this application may include a power distribution apparatus <NUM>, the cold source apparatus <NUM>, the water pump <NUM>, and a heat dissipation apparatus <NUM>. The power distribution apparatus <NUM> can implement a power distribution function of the charging terminal. The cold source apparatus <NUM> is configured to store a cooling working medium. The water pump may be configured to provide a driving force for the cooling working medium in the cold source apparatus <NUM>. The heat dissipation apparatus <NUM> is configured to cool the cooling working medium in the circulation pipe <NUM>, to implement cyclic utilization of the cooling working medium. For example, the heat dissipation apparatus <NUM> in the charging pile <NUM> in this embodiment of this application may be an air-cooled radiator or a water-cooled radiator. As an example, this is not limited in this embodiment of this application.

It should be understood that another apparatus, for example, a monitoring apparatus, may alternatively be disposed in the charging pile <NUM> in this embodiment of this application according to an actual requirement, to monitor an electricity quantity change in the charging pile <NUM> and a water pressure change in the circulation pipe <NUM>.

In a possible implementation, the charging pile <NUM> may alternatively be disposed as an integrated charging pile. To be specific, the charging pile <NUM> further includes a power module disposed inside the pile body <NUM>, and the power module can implement a power supply conversion function of the integrated charging pile.

In a possible implementation, the charging connector <NUM> in this embodiment of this application further includes a hydraulic buffer apparatus <NUM>. The hydraulic buffer apparatus <NUM> communicates with the circulation pipe <NUM>, and the hydraulic buffer apparatus <NUM> is configured to relieve pressure in the circulation pipe <NUM> when the pressure in the circulation pipe <NUM> is greater than a preset threshold.

It should be understood that, in this embodiment of this application, the preset threshold may be set according to an actual requirement. For example, the preset threshold may be set based on a material characteristic of the circulation pipe <NUM> inside the wire cable <NUM> of the charging connector <NUM>. As an example, this is not limited in this embodiment of this application.

Optionally, as shown in <FIG>, a first end of the charging terminal <NUM> of the charging connector <NUM> is electrically connected to a first end of the cable <NUM>, a second end of the charging terminal <NUM> may be connected to the power-consuming device (for example, an electric vehicle) to charge the power-consuming, and a second end of the cable <NUM> is electrically connected to the power distribution apparatus <NUM> of the pile body <NUM>. The circulation pipe <NUM> is sequentially connected to the cold source apparatus <NUM>, the water pump <NUM>, and the radiator <NUM> to form a cooling loop, to implement heat dissipation processing on the charging terminal <NUM> and the cable <NUM> through convection heat exchange. The hydraulic buffer apparatus <NUM> may communicate with the circulation pipe <NUM> inside the connector housing <NUM>, to relieve the pressure in the circulation pipe <NUM> when the pressure in the circulation pipe <NUM> is greater than the preset threshold, to ensure security and reliability of the charging connector <NUM> in a charging process.

The following describes in detail the hydraulic buffer apparatus <NUM> in embodiments of this application with reference to <FIG>.

<FIG> is a schematic diagram of an example of a structure of a hydraulic buffer apparatus <NUM> according to an embodiment of this application. <FIG> is a schematic exploded diagram of an example of a structure of a hydraulic buffer apparatus <NUM> according to an embodiment of this application. For example, <FIG> may be a schematic exploded diagram of a structure of the hydraulic buffer apparatus <NUM> shown in <FIG>.

As shown in <FIG> and <FIG>, the hydraulic buffer apparatus <NUM> in this embodiment of this application may include a piston <NUM> and a housing <NUM> having an opening 310a. The housing <NUM> may include a first cavity <NUM> and a second cavity <NUM>. The piston <NUM> is disposed in the housing <NUM> and is located between the first cavity <NUM> and the second cavity <NUM>. A fluid in the circulation pipe <NUM> may enter the first cavity <NUM> through the opening 310a. The fluid flowing into the first cavity <NUM> may push the piston <NUM> to compress the second cavity <NUM> when pressure in the circulation pipe <NUM> is greater than a preset threshold, to reduce damage to the circulation pipe <NUM> caused by excessively high pressure in the circulation pipe <NUM> or adverse impact of fluid leakage in the circulation pipe <NUM> on the inside of the wire cable.

Optionally, in a possible implementation, as shown in <FIG>, the hydraulic buffer apparatus <NUM> in this embodiment of this application further includes a retractable corrugated structure <NUM>. The corrugated structure <NUM> is disposed between the opening 310a and the piston <NUM>, to form the first cavity <NUM>. Specifically, the fluid flowing into the hydraulic buffer apparatus <NUM> causes the corrugated structure <NUM> to be stretched when the pressure in the circulation pipe <NUM> is greater than the preset threshold, to push the piston <NUM> to compress the second cavity <NUM>, to release the pressure in the circulation pipe <NUM>, and reduce damage to the circulation pipe <NUM> caused by excessively high pressure in the circulation pipe <NUM> or adverse impact of fluid leakage in the circulation pipe <NUM> on the inside of the wire cable. In addition, the corrugated structure <NUM> may be disposed to ensure sealing effect of the first cavity <NUM>, to prevent a fluid in the first cavity <NUM> from flowing into the second cavity <NUM>.

Optionally, in a possible implementation, as shown in <FIG>, an elastic component <NUM> is further disposed inside the second cavity <NUM> in the hydraulic buffer apparatus <NUM> in this embodiment of this application, and the elastic component <NUM> is connected to the piston <NUM> and a wall that is of the housing <NUM> and that is opposite to the piston <NUM>. For example, when the wire cable <NUM> of the charging connector <NUM> is crushed by a vehicle tire, the pressure in the circulation pipe <NUM> on a side that is of the wire cable <NUM> and that faces the charging terminal <NUM> is high, and the hydraulic buffer apparatus <NUM> may implement buffering on the fluid in the circulation pipe <NUM>, to reduce damage to the circulation pipe <NUM> or fluid leakage in the circulation pipe <NUM>. After the vehicle tire leaves the wire cable <NUM>, because of elasticity of the elastic component <NUM> disposed in the second cavity <NUM> in the hydraulic buffer apparatus <NUM>, the pressure in the circulation pipe <NUM> may be restored to normal. This facilitates cyclic use of the hydraulic buffer apparatus <NUM>, and helps improve security and reliability of the charging connector <NUM>.

Optionally, in a possible implementation, the hydraulic buffer apparatus <NUM> in this embodiment of this application may further include a connection pipe <NUM>, and the connection pipe <NUM> is connected to the opening 310a and the circulation pipe <NUM>. It should be understood that the hydraulic buffer apparatus <NUM> in this embodiment of this application may directly communicate with the circulation pipe <NUM>, or may communicate with the circulation pipe <NUM> through the connection pipe <NUM>.

It should be understood that <FIG> and <FIG> are merely examples to describe a connection relationship between the charging pile <NUM> and the charging connector <NUM>, and do not specifically limit connection locations, specific structures, and quantities of the devices. For example, the charging pile <NUM> in this embodiment of this application may include more or fewer components than those shown in the figure, or combine some of the components, or split some of the components, or have different component arrangements. It should be further understood that the components shown in <FIG> and <FIG> may be implemented by hardware, software, or a combination of software and hardware. This is not limited in embodiments of this application.

The following describes in detail a working principle of the hydraulic buffer apparatus <NUM> according to an embodiment of this application with reference to <FIG> are schematic diagrams of structures of the hydraulic buffer apparatus <NUM> before and after the wire cable <NUM> of the charging connector <NUM> is crushed by the vehicle according to an embodiment of this application.

As shown in <FIG>, the hydraulic buffer apparatus <NUM> includes the housing <NUM>, the piston <NUM>, the retractable corrugated structure <NUM>, the elastic component <NUM>, and the connection pipe <NUM>. A first end of the connection pipe <NUM> is connected to the circulation pipe <NUM>, the retractable corrugated structure <NUM> is disposed at a second end of the connection pipe <NUM>, the corrugated structure <NUM> is connected to a first end of the piston <NUM>, a second end of the piston <NUM> is connected to a first end of the elastic component <NUM>, and a second end of the elastic component <NUM> is connected to a wall that is of the housing <NUM> and that is opposite to the piston <NUM>. For example, the elastic component in this embodiment of this application may be a spring. As an example, this is not limited in this embodiment of this application.

In a possible implementation, when the wire cable <NUM> of the charging connector <NUM> is not crushed by the vehicle tire and the charging connector <NUM> does not work, as shown in <FIG>, the retractable corrugated structure <NUM> in the hydraulic buffer apparatus <NUM> is in a fully compressed state, the elastic component <NUM> is in a partially compressed state, and the piston <NUM> is at a top dead center. When the charging connector <NUM> is in a normal working state, because some of the fluid in the circulation pipe <NUM> flows into the hydraulic buffer apparatus <NUM>, that is, the retractable corrugated structure <NUM> in the hydraulic buffer apparatus <NUM> is in a partially compressed state, the elastic component <NUM> is in a partially compressed state, and the piston is at a top dead center.

When the wire cable <NUM> of the charging connector <NUM> is crushed by the vehicle tire, as shown in <FIG>, because the pressure in the circulation pipe <NUM> increases rapidly in a short period of time, the fluid in the circulation pipe <NUM> is forced to flow into the hydraulic buffer apparatus <NUM>, so that the corrugated structure <NUM> is stretched and the piston <NUM> is pushed to compress the elastic component <NUM>, to buffer the fluid in the circulation pipe <NUM>, and reduce damage to the circulation pipe <NUM> or fluid leakage in the circulation pipe <NUM>.

In a possible implementation, the inflow pipe 122a in this embodiment of this application may communicate with the hydraulic buffer apparatus <NUM>, or the outflow pipe 122b may communicate with the hydraulic buffer apparatus <NUM>, or both the inflow pipe 122a and the outflow pipe 122b communicate with the hydraulic buffer apparatus <NUM>, so that when the wire cable <NUM> of the charging connector <NUM> is crushed by the vehicle tire, the fluid in the circulation pipe <NUM> may flow into the hydraulic buffer apparatus <NUM>, to buffer the pressure in the circulation pipe <NUM>, to reduce damage to the circulation pipe <NUM> or fluid leakage in the circulation pipe <NUM>, and improve security and reliability of the charging connector <NUM> in the charging process.

The foregoing describes the structure and the working principle of the hydraulic buffer apparatus. The following describes in detail a specific installation manner of the hydraulic buffer apparatus <NUM> in the charging connector <NUM> with reference to <FIG>.

In a possible implementation, as shown in <FIG>, a heat exchange pool <NUM> may be further disposed in the charging connector <NUM>, one side of the heat exchange pool <NUM> is attached to the charging terminal <NUM>, and the heat exchange pool <NUM> is connected to the circulation pipe <NUM>, to facilitate heat dissipation processing on the charging terminal <NUM>.

<FIG> is a schematic diagram of an example of a structure <NUM> in which the hydraulic buffer apparatus <NUM> is disposed in the charging connector <NUM> according to an embodiment of this application. For example, the structure <NUM> shown in <FIG> may be disposed inside the connector housing <NUM> of the charging connector <NUM> in <FIG>, or the structure <NUM> may be disposed at another location of the charging connector <NUM>. This is not limited in this embodiment of this application.

In a possible implementation, the heat exchange pool <NUM> may be connected to the hydraulic buffer apparatus <NUM>. Specifically, as shown in <FIG>, the heat exchange pool <NUM> may include a liquid inlet <NUM>, a liquid outlet <NUM>, and a first interface <NUM>. A first end of the inflow pipe 122a in the circulation pipe <NUM> is connected to the liquid inlet <NUM>, the outflow pipe 122b in the circulation pipe <NUM> is connected to the liquid outlet <NUM>, and the hydraulic buffer apparatus <NUM> communicates with the first interface <NUM>.

It should be understood that, in this embodiment of this application, when the hydraulic buffer apparatus <NUM> includes the connection pipe <NUM>, the hydraulic buffer apparatus <NUM> is connected to the first interface <NUM> of the heat exchange pool <NUM>; or when the connection pipe <NUM> is not disposed in the hydraulic buffer apparatus <NUM>, the connection pipe <NUM> may be disposed in the heat exchange pool <NUM>, and the hydraulic buffer apparatus <NUM> may communicate with the heat exchange pool <NUM> through the connection pipe <NUM>. In this embodiment of this application, when the connection pipe <NUM> is disposed in the heat exchange pool <NUM>, the connection pipe <NUM> may be integrated with the heat exchange pool <NUM> or connected in another manner. As an example, this is not limited in this embodiment of this application.

It should be further understood that at least one liquid inlet <NUM> and at least one liquid outlet <NUM> may be disposed in the heat exchange pool <NUM> in this embodiment of this application. The at least one liquid inlet <NUM> is in a one-to-one correspondence with at least one inflow pipe 122a, and the at least one liquid outlet <NUM> is in a one-to-one correspondence with at least one outflow pipe 122b. Specifically, the at least one inflow pipe 122a that is in a one-to-one correspondence with the at least one liquid inlet <NUM> and the at least one outflow pipe 122b that is in a one-to-one correspondence with the at least one liquid outlet <NUM> need to be disposed in the circulation pipe <NUM>.

It should be further understood that at least one first interface <NUM> may be disposed in the heat exchange pool in this embodiment of this application, and the at least one first interface <NUM> is in a one-to-one correspondence with at least one hydraulic buffer apparatus <NUM>.

In this embodiment of this application, the first interface <NUM> is disposed on one side of the heat exchange pool <NUM> in the charging connector <NUM>, and the first interface <NUM> communicates with the hydraulic buffer apparatus <NUM>, so that when pressure in the circulation pipe <NUM> is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus <NUM> buffers the circulation pipe <NUM>, to reduce damage to the circulation pipe <NUM> caused by excessively high pressure in the circulation pipe <NUM> or adverse impact of fluid leakage in the circulation pipe <NUM> on the inside of the wire cable, to improve security and reliability of the charging connector <NUM>. In addition, the structure <NUM> is simple, and is convenient for processing and assembly of the charging connector <NUM>.

<FIG> is a schematic diagram of another example of a structure <NUM> in which the hydraulic buffer apparatus <NUM> is disposed in the charging connector <NUM> according to an embodiment of this application. As shown in <FIG>, a difference between the structure <NUM> and the structure <NUM> shown in <FIG> is that the hydraulic buffer apparatus <NUM> in this embodiment of this application may be disposed as a square mechanism, and may be stacked above the heat exchange pool <NUM>.

It should be understood that the hydraulic buffer apparatus <NUM> in this embodiment of this application may alternatively be disposed in a cylindrical shape, a square shape, a polygonal shape, or the like, or a shape of the hydraulic buffer apparatus <NUM> may be determined based on a shape of the heat exchange pool <NUM>. As an example, this is not limited in this embodiment of this application.

It should be further understood that, in this embodiment of this application, when the hydraulic buffer apparatus <NUM> includes the connection pipe <NUM>, the hydraulic buffer apparatus <NUM> may be directly connected to the first interface <NUM> of the heat exchange pool <NUM>; or when the connection pipe <NUM> is not disposed in the hydraulic buffer apparatus <NUM>, the connection pipe <NUM> may be disposed at an end of the heat exchange pool <NUM>, and the hydraulic buffer apparatus <NUM> may communicate with the heat exchange pool <NUM> through the connection pipe <NUM>. In this embodiment of this application, when the connection pipe <NUM> is disposed in the heat exchange pool <NUM>, the connection pipe <NUM> may be integrated with the heat exchange pool <NUM> or connected in another manner. As an example, this is not limited in this embodiment of this application.

In this embodiment of this application, the hydraulic buffer apparatus <NUM> is disposed as a square structure, and is stacked above the heat exchange pool <NUM>, so that the hydraulic buffer apparatus <NUM> is installed in the heat exchange connector <NUM>, and space utilization inside the connector <NUM> of the charging connector <NUM> may be improved.

<FIG> is a schematic diagram of another example of a structure <NUM> in which the hydraulic buffer apparatus <NUM> is disposed in the charging connector <NUM> according to an embodiment of this application. As shown in <FIG>, a three-way adapter <NUM> may be disposed in the outflow pipe 122b in the circulation pipe <NUM>, a first segment <NUM> of the three-way adapter <NUM> communicates with the heat exchange pool <NUM>, a second end <NUM> of the three-way adapter <NUM> may communicate with the cold source apparatus <NUM> of the pile body <NUM>, and a third end <NUM> of the three-way adapter <NUM> communicates with the hydraulic buffer apparatus <NUM>.

It should be understood that the three-way adapter <NUM> in this embodiment of this application may communicate with the inflow pipe 122a and/or the outflow pipe 122b in the circulation pipe <NUM>. For example, the three-way adapter <NUM> may be disposed in the inflow pipe 122a in the circulation pipe <NUM>, or the three-way adapter <NUM> may be disposed in the outflow pipe 122b in the circulation pipe <NUM>, or the three-way adapter <NUM> may be separately disposed in the inflow pipe 122a and the outflow pipe 122b in the circulation pipe <NUM>.

In this embodiment of this application, the three-way adapter <NUM> is disposed in the inflow pipe 122a and/or the outflow pipe 122b in the circulation pipe <NUM> to communicate with the hydraulic buffer apparatus <NUM>, so that when the pressure in the circulation pipe <NUM> is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus <NUM> may buffer the circulation pipe <NUM>, to reduce damage to the circulation pipe <NUM> caused by excessively high pressure in the circulation pipe <NUM> or adverse impact of fluid leakage in the circulation pipe <NUM> on the inside of the wire cable, to improve security and reliability of the charging connector <NUM> in the charging process. In addition, the structure design is simple, and there is no need to affect the structure of the heat exchange pool <NUM>.

<FIG> is a schematic diagram of another example of a structure <NUM> in which the hydraulic buffer apparatus <NUM> is disposed in the charging connector <NUM> according to an embodiment of this application. As shown in <FIG>, the circulation pipe <NUM> includes two inflow pipes 122a and one outflow pipe 122b. A three-way adapter <NUM> may be disposed in the outflow pipe 122b in the circulation pipe <NUM>, a first segment <NUM> of the three-way adapter <NUM> communicates with the heat exchange pool <NUM>, a second end <NUM> of the three-way adapter <NUM> may communicate with the cold source apparatus <NUM> of the pile body <NUM>, and a third end <NUM> of the three-way adapter <NUM> communicates with the hydraulic buffer apparatus <NUM>.

In a possible implementation, the three-way adapter <NUM> may be further disposed in the inflow pipe 122a. Specifically, as shown in <FIG>, the three-way adapter may be disposed in either of the two inflow pipes 122a, or the three-way adapter <NUM> may be separately disposed in the two inflow pipes 122a.

It should be understood that quantities of inflow pipes 122a and outflow pipes 122b in the circulation pipe <NUM> in this embodiment of this application may be set according to an actual requirement. For example, the quantities of inflow pipes 122a and outflow pipes 122b in the circulation pipe <NUM> may be set based on quantities of liquid inlets <NUM> and liquid outlets <NUM> of the heat exchange pool <NUM>. In this embodiment of this application, at least one liquid inlet <NUM> of the heat exchange pool <NUM> is in a one-to-one correspondence with at least one inflow pipe 122a in the circulation pipe <NUM>, and at least one liquid outlet <NUM> of the heat exchange pool <NUM> is in a one-to-one correspondence with at least one outflow pipe 122b in the circulation pipe <NUM>.

In a possible implementation, the at least one liquid inlet <NUM> and the at least one liquid outlet <NUM> may be disposed on a side that is of the heat exchange pool <NUM> and that is away from the charging terminal <NUM> in this embodiment of this application. The at least one liquid inlet <NUM> is in a one-to-one correspondence with the at least one inflow pipe 122a, and the at least one liquid outlet <NUM> is in a one-to-one correspondence with the at least one outflow pipe 122b. In this embodiment of this application, the three-way adapter <NUM> is disposed in the at least one inflow pipe 122a and/or the at least one outflow pipe 122b in the circulation pipe <NUM> to communicate with the hydraulic buffer apparatus <NUM>, so that when the pressure in the circulation pipe <NUM> is greater than the preset threshold, the fluid flowing into the hydraulic buffer apparatus <NUM> may effectively buffer the circulation pipe <NUM>, to reduce damage to the circulation pipe <NUM> caused by excessively high pressure in the circulation pipe <NUM> or adverse impact of fluid leakage in the circulation pipe <NUM> on the inside of the wire cable <NUM>, to improve security and reliability of the charging connector <NUM> in the charging process. In addition, the at least one inflow pipe 122a and the at least one outflow pipe 122b are disposed in the circulation pipe <NUM> in the charging connector <NUM>, so that heat exchange efficiency of the fluid in the circulation pipe <NUM> may be accelerated, to improve heat dissipation effect of the charging terminal <NUM>.

The terms used in the foregoing embodiments are merely intended to describe specific embodiments, but are not intended to limit embodiments of this application. The terms "one", "a", "the", "the foregoing", "this", and "the one" of singular forms used in this specification and the appended claims of this application are also intended to include forms such as "one or more", unless otherwise specified in the context clearly.

Reference to "an embodiment", "some embodiments", or the like described in embodiments of this application indicates that one or more embodiments of this application include a specific feature, structure, or characteristic described with reference to embodiments. Therefore, statements such as "in an embodiment", "in some embodiments", "in some other embodiments", and "in other embodiments" that appear at different places in embodiments of this application do not necessarily mean referring to a same embodiment. Instead, the statements mean "one or more but not all of embodiments", unless otherwise specifically emphasized in another manner. The terms "include", "comprise", "have", and their variants all mean "include but are not limited to", unless otherwise specifically emphasized in another manner.

It should be further understood that, in embodiments of this application, "at least one" means one or more, and "a plurality of" means two or more. The term "and/or" describes an association relationship between associated objects, and indicates that three relationships may exist. For example, A and/or B may indicate the following three cases: Only A exists, both A and B exist, and only B exists, where A and B may be singular or plural. The character "/" usually indicates an "or" relationship between the associated objects. "At least one of the following items (pieces)" or a similar expression thereof means any combination of these items, including any combination of singular items (pieces) or plural items (pieces). For example, at least one (piece) of a, b, and c may indicate a, b, c, a and b, a and c, b and c, or a, b, and c. Each of a, b, and c may be in a singular form or a plural form.

It should be understood that, in the embodiments shown above, "first", "second", "third", "fourth", and various numerical numbers are merely used for distinguishing for ease of description, but are not used to limit the scope of embodiments of this application. Specifically, "first", "second", and the like are merely intended for a purpose of description, and shall not be understood as an indication or implication of relative importance or implicit indication of a quantity of indicated technical features. Therefore, a feature limited by "first ", "second" and the like may explicitly indicate or implicitly include one or more such features.

Claim 1:
A charging connector (<NUM>), comprising a charging terminal (<NUM>), a cable (<NUM>) and a circulation pipe (<NUM>), wherein
the charging terminal (<NUM>) is connected to the cable (<NUM>);
the circulation pipe (<NUM>) is configured to communicate with a cold source apparatus (<NUM>) to form a cooling loop; characterized in that
the charging connector (<NUM>) further comprises, a hydraulic buffer apparatus (<NUM>), wherein the hydraulic buffer apparatus (<NUM>) communicates with the circulation pipe (<NUM>), and the hydraulic buffer apparatus (<NUM>) is configured to relieve pressure in the circulation pipe (<NUM>) when the pressure in the circulation pipe (<NUM>) is greater than a preset threshold.