A charging device and a charging gun module thereof

Abstract

The embodiment of the application discloses a charging device and a charging gun module thereof. The charging gun module comprises a charging cable assembly, two power lines, a plurality of signal lines and a liquid cooling pipe are arranged in the insulating jacket of the charging cable assembly, one end of the liquid cooling pipe is communicated with the working medium cavity liquid inlet of the two power lines respectively, the other end of the liquid cooling pipe is used for inputting liquid cooling medium, and the working medium cavity liquid outlet of the two power lines is used for outputting liquid cooling medium. By such arrangement, the cable conductor and the working medium flowing in parallel can exchange heat at the same time, the temperature uniformity is ensured, and on the basis of the same working medium flow and heat conduction cross-sectional area, the cascade temperature rise can be effectively reduced. The same cable structure can support the application scene of higher charging power, the product cost generated by the structural redundancy design is effectively avoided, and technical support is provided for the rationalization design of the heat dissipation architecture.

Description

Technical Field

[0001] This application relates to the field of charging equipment technology, and in particular to a charging device and its charging gun module. Background Technology

[0002] To achieve the goals of low-carbon, environmentally friendly, and zero-carbon emissions, electrification has become a new development direction for the automotive industry. High-power vehicles require corresponding fast-charging technology to ensure that the battery reaches or nearly fully charges in a short time. With the continuous development of fast-charging technology, charging voltage and current are gradually increasing, and the cables will generate a significant amount of heat during the charging process.

[0003] With the continuous improvement of charging power, the advantages of liquid cooling technology are becoming increasingly prominent. One typical liquid-cooled cable uses non-contact liquid cooling with cooling pipes. Liquid cooling pipes are placed next to the DC+ / DC- power lines to remove heat generated by the copper conductors within the power lines. However, the insulation between the cooling medium and the heat-generating conductors provides some thermal resistance, resulting in relatively low actual heat dissipation efficiency and limiting the improvement of fast charging power. Another typical liquid-cooled cable uses immersion contact liquid cooling. Specifically, the liquid cooling pipes are placed inside or outside the copper conductors of the DC+ / DC- power lines. Simultaneously, the liquid cooling pipes for the DC+ and DC- power lines are connected in series. Heat is removed through the flow of the cooling medium. The conductor that comes into contact with the medium first has a significantly lower temperature than the conductor that comes into contact with it later, resulting in poor temperature uniformity. Furthermore, the medium exchanges heat with the conductors before reaching the power terminals, leading to poor heat dissipation capacity for the power terminals. Summary of the Invention

[0004] This application provides a charging device and its charging gun module, which can effectively improve the heat dissipation capacity of the charging gun module.

[0005] The first aspect of this application provides a charging gun module, which includes a connected charging gun and a charging cable assembly. The charging cable assembly has two power lines, several signal lines, and a liquid cooling pipe disposed within its insulating jacket. The power lines have power terminals at their ends, and the signal lines have signal terminals at their ends. The power terminals and signal terminals are located at the insertion end of the charging gun. Each power line has a working fluid chamber. One end of the liquid cooling pipe is connected to the liquid inlet of the working fluid chamber of at least two power lines, and the other end of the liquid cooling pipe is used to input liquid cooling working fluid. The liquid outlets of the working fluid chambers of the two power lines are used to output liquid cooling working fluid. With this configuration, the conductors of at least two power lines exchange heat with the parallel-flowing working fluid simultaneously, ensuring temperature uniformity. Based on the same working fluid flow rate and thermal conductivity cross-sectional area, cascading temperature rise can be effectively reduced. Thus, the heat dissipation capacity of the two power lines tends to be consistent, and the same cable structure can support applications with higher charging power, effectively avoiding product costs caused by redundant structural design.

[0006] In addition, the good temperature uniformity of the two power lines facilitates the parameter configuration of the liquid cooling system, providing technical support for the rational design of the heat dissipation architecture.

[0007] For example, the liquid cooling pipe can also provide liquid cooling fluid to the signal line or the ground line.

[0008] Alternatively, the liquid cooling pipe can be configured as a plurality of pipes, each providing liquid cooling fluid to at least two cables.

[0009] Based on the first aspect, this application also provides a first implementation of the first aspect: the power line includes a conductor and an insulating outer sheath, and multiple working fluid cavities are provided, with at least one working fluid cavity located inside the conductor and at least one working fluid cavity located between the conductor and the insulating outer sheath; in a specific implementation, the working fluid cavity includes an external working fluid cavity located between the conductor and the insulating outer sheath, and an internal working fluid cavity located in the middle of the conductor, both the external and internal working fluid cavities being arranged along the cable extension direction. In this way, after the working fluid enters the power line through the liquid cooling pipe, it flows into the external and internal working fluid cavities respectively, simultaneously exchanging heat with the inner and outer surfaces of the conductor. In other words, the conductor is cooled on both sides, increasing the heat exchange area between the working fluid and the conductor, and effectively improving the heat dissipation efficiency of the power line.

[0010] Based on the first embodiment of the first aspect, this application also provides a second embodiment of the first aspect: the working fluid inlet and the power terminal are located at the same end of the power line, and an electrode is sealed and connected to the tail end of the power line. That is, the working fluid inlet is located at the head of the charging gun module. The low-temperature working fluid entering the power line first exchanges heat with the power terminal, carrying away the heat generated by the power terminal with high contact resistance during charging, and then flows along the working fluid cavity to carry away the heat generated by the conductor. In this way, the heat dissipation bottleneck problem at the power terminal can be further improved while improving the heat dissipation efficiency.

[0011] Based on the first embodiment of the first aspect, or the second embodiment of the first aspect, this application also provides a third embodiment of the first aspect: a hollow support member is provided inside the internal working fluid cavity, and the support member abuts against the inner wall of the internal working fluid cavity. With this arrangement, the physical support formed by the support member can prevent the internal working fluid cavity from being blocked due to cable compression.

[0012] Based on the first, second, or third implementation of the first aspect, this application also provides a fourth implementation of the first aspect: a core is provided between the power terminal of the power line and the conductor and insulating outer sheath; the power terminal is connected to a first side of the core, and the conductor and insulating outer sheath are connected to a second side of the core; the core is provided with a liquid inlet and a working fluid cavity; the liquid inlet is connected to a liquid cooling pipe, and the working fluid cavity is connected to the liquid inlet; the working fluid cavity can be connected to the power terminal located on the first side of the core and the working fluid cavity located on the second side of the core, respectively. In this way, an electrical connection and heat dissipation path are established between the power terminal side and the conductor and insulating outer sheath through the core, resulting in a simple and reliable structure.

[0013] Based on the fourth embodiment of the first aspect, this application also provides a fifth embodiment of the first aspect: the working fluid channel on the core includes a cavity, a through hole, and a diversion hole connected in sequence; wherein, the cavity is connected to the liquid inlet, and the power terminal is inserted and fixed to the cavity; the through hole extends from the end face of the first side of the core to the end face of the second side, and the orifice of the through hole on the first side can communicate with the cavity, the through hole is connected to the internal working fluid cavity in the middle of the conductor through the orifice on the second side, and the diversion hole is connected to the external working fluid cavity between the insulating outer sheath and the conductor. With this configuration, the working fluid can flow into the external working fluid cavity and the internal working fluid cavity respectively, and simultaneously exchange heat with the inner and outer surfaces of the conductor of the power line, effectively improving the heat exchange efficiency. It has the characteristic of reliable structure.

[0014] Based on the fifth embodiment of the first aspect, this application also provides a sixth embodiment of the first aspect: A guide cavity is provided on the insertion side of the power terminal, and a guide portion is provided within the cavity of the core. The extended end of the guide portion is located in the guide cavity of the power terminal, and a flow channel is formed between the guide portion and the sidewall of the cavity and the sidewall of the guide cavity. The orifice of the through hole on the first side is located on the extended end face of the guide portion. In this way, the working fluid can reach the interior of the power terminal for sufficient heat exchange, and then flow to the working fluid cavity of the power line through the through hole, thereby maximizing the use of the low-temperature working fluid to improve the heat dissipation capacity of the power terminal side and supporting application scenarios with higher charging power.

[0015] For example, the guide portion can be a tubular structure, and the portion of the through hole near the first side is formed by the hole wall of the tubular guide portion, which has a good structural integration.

[0016] Based on the fourth, fifth, or sixth implementation of the first aspect, this application also provides a seventh implementation of the first aspect: the second side of the core has a first connecting portion and a second connecting portion, the second connecting portion being radially close to the through hole relative to the first connecting portion; wherein, the first connecting portion is used to fix the insulating outer sheath, and the conductor is connected to the second connecting portion. In this way, the external structure of the core is used to arrange the fixing of the conductor and the insulating outer sheath.

[0017] Based on the seventh embodiment of the first aspect, this application also provides an eighth embodiment of the first aspect: the power line further includes a liner, which includes a first tube segment and a second tube segment. One side of the first tube segment is spaced apart from the orifice of the shunt hole and the outer peripheral surface of the conductor. The other side of the first tube segment is connected to one side of the second tube segment. The other side of the second tube segment is nested between the insulating outer sheath and the conductor. The inner wall of the second tube segment abuts against the outer surface of the conductor and has a liquid guiding groove extending through it along the cable extension direction. With this configuration, the liquid flows through the guiding groove to the external working fluid cavity, establishing a conductive path between the shunt channel and the external working fluid cavity around the conductor. It is also fitted onto the second connecting part of the core, establishing a conductive path between the through hole and the internal working fluid cavity in the middle of the conductor. Based on the structural rigidity of the liner, the liner can maintain a defined relative positional relationship with the orifice of the shunt hole in the radial direction to obtain a stable and reliable flow state.

[0018] Based on the eighth embodiment of the first aspect, this application also provides a ninth embodiment of the first aspect: the second side of the core is a stepped shaft, which includes a large-diameter section, a medium-diameter section, and a small-diameter section arranged sequentially towards the end; a first connecting part is located in the large-diameter section, and the first end of the liner is fixed to the large-diameter section; a diversion hole is located in the medium-diameter section; a second connecting part is located in the small-diameter section, and a conductor sleeve is fixed on the small-diameter section. In a specific implementation, the diversion hole can extend radially to the outer peripheral surface of the medium-diameter section, the cross-sectional dimension of which is larger than that of the small-diameter section, and multiple diversion holes can be radially opened to have reliable load-bearing strength.

[0019] A second aspect of this application provides a charging device, which includes a device body and a charging gun module. The charging gun module adopts the charging gun module described above. The device body includes a heat sink, a liquid storage tank, and a liquid pump. The inlet of the heat sink is connected to the liquid outlet of the working fluid chamber of the power line, and the outlet of the heat sink is connected to the liquid storage tank. The liquid pump's intake port is connected to the inside of the liquid storage tank, and the liquid pump's outlet is connected to the other end of a liquid cooling pipe. Based on the excellent heat dissipation capability of this charging gun module, it can meet the needs of using higher charging power and effectively improve the actual charging speed.

[0020] For example, the main body of the charging device can be a public charging pole or a home charging station. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a charging device provided in an embodiment of this application;

[0022] Figure 2 A schematic diagram of a charging cable assembly provided in an embodiment of this application;

[0023] Figure 3 A schematic diagram of a heat dissipation architecture for a charging cable assembly provided in an embodiment of this application;

[0024] Figure 4 for Figure 1 A cross-sectional schematic diagram of the charging cable assembly shown;

[0025] Figure 5 for Figure 4 The diagram shows a schematic of the power line structure.

[0026] Figure 6 This is a schematic diagram of the assembly relationship of a power line provided in an embodiment of this application;

[0027] Figure 7 for Figure 6 An exploded view of the assembly of the power lines shown in the diagram;

[0028] Figure 8 for Figure 6 A schematic diagram showing the assembly relationship of the power terminals;

[0029] Figure 9 for Figure 6 An axial cross-sectional view of the power line shown;

[0030] Figure 10 This is a schematic diagram of the structure of a liner provided in an embodiment of this application;

[0031] Figure 11 for Figure 10 The axial sectional view of the liner shown. Detailed Implementation

[0032] Typically, the charging gun of a charging device is connected to the main body of the device via a charging cable assembly to enable power supply and communication between the vehicle and the charging device. Please see [link / reference]. Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram of a charging device 100 provided in an embodiment of this application. Figure 2 This is a schematic diagram of a charging cable assembly provided in an embodiment of this application.

[0033] like Figure 1As shown, the charging device 100 includes a device body 30 and a charging cable assembly 20. A charging gun 10 is connected to the charging cable assembly 20, and the insertion end of the charging gun 10 is adapted to fit the side of the vehicle (not shown in the figure) and is connected to the device body 30 via the charging cable assembly 20. The charging gun 10 and the charging cable assembly 20 together constitute a charging gun module. A working fluid source is provided on the device body 30 side, including a radiator 31, a liquid storage tank 32, and a liquid pump 33, to form a working fluid source that can provide liquid cooling working fluid. Figure 2 As shown, the charging cable assembly 20 includes two power lines 21, a grounding line 22, and several signal lines 23 located within an insulating jacket 24. For example, but not limited to, the two power lines 21 can be a DC+ power line (positive power line) and a DC- power line (negative power line) for DC charging. The DC+ / DC- power lines are respectively connected to the positive and negative terminals of the DC power supply on the device body 20 side to transmit DC power to the power battery on the vehicle side, thereby achieving fast charging.

[0034] This application proposes a solution for the charging gun module to achieve good heat dissipation and support increased charging power. In this embodiment, the power line 21 is a liquid-cooled cable with a working fluid cavity. Its head end and tail end are respectively sealed and connected to the power terminal 213 and the electrode 214. The power terminal at the head end is built into the charging gun 10 and is used to connect to the charging socket on the vehicle side. The electrode at the tail end is connected to the device body 30.

[0035] The charging gun module also includes a liquid cooling pipe 25, which serves as a liquid cooling inlet pipe for delivering liquid cooling medium to the two power lines 21. Please refer to [link / reference needed]. Figure 3 The figure is a schematic diagram of the heat dissipation architecture of the charging cable assembly provided in the embodiment of this application.

[0036] One end of the liquid cooling pipe 25 is connected to the working fluid inlet 21a of the two power lines 21 respectively, for example, but not limited to, through a three-way connector 251 to achieve connection with the two working fluid inlet 21a respectively; the other end of the liquid cooling pipe 25 is used to input liquid cooling working fluid, that is, connected to the working fluid source on the side of the main body 30 of the equipment, and the working fluid outlet 21b of each power line 21 is used to output liquid cooling working fluid, that is, connected to the radiator 31 on the side of the main body 30 of the equipment. During operation, the liquid pump 33 pumps the working fluid into the liquid cooling pipe 25 on the charging gun module side, and then distributes it through the liquid cooling pipe 25 to the working fluid inlet of the two power lines 21. In the working fluid chamber of each power line 21, the working fluid flows from the working fluid inlet 21a to the working fluid outlet 21b. The working fluid that has completed heat exchange flows back to the main body of the equipment 30 through the working fluid outlet 21b, and flows into the storage tank 32 after being cooled by the radiator 31, thus establishing a liquid cooling heat dissipation cycle.

[0037] In this way, the conductors of the two power lines 21 exchange heat with the parallel-flowing working fluid simultaneously, ensuring temperature uniformity. With the same working fluid flow rate and thermal conductivity cross-sectional area, this solution effectively reduces cascading temperature rise. On one hand, the heat dissipation capacity of the two power lines tends to be consistent, allowing the use of the same cable structure to support applications with higher charging power, effectively avoiding product costs caused by redundant structural design. On the other hand, the good temperature uniformity of the two power lines further facilitates the parameter configuration of the liquid cooling system, providing technical support for the rational design of the heat dissipation architecture.

[0038] In possible implementations, the liquid storage tank 32 is an optional component. The main body of the device 30 may only contain the liquid pump 33. After the working fluid is cooled by the radiator 31, it directly enters the liquid cooling cycle. The heat dissipation requirements are met by reasonably controlling the flow rate and pressure of the working fluid. In other words, the working fluid source can adopt other configurations, as long as they meet the functional requirements of liquid cooling. This application does not limit the implementation.

[0039] To further improve the heat exchange efficiency of the working fluid within the power line 21, cooling channels may optionally be provided both inside and outside the conductor of the power line. Please refer to... Figure 4 and Figure 5 ,in, Figure 4 for Figure 1 A cross-sectional schematic diagram of the charging cable assembly 20 shown. Figure 5 for Figure 4 The diagram shows the structure of power line 21.

[0040] The power line 21 includes a conductor 211 and an insulating outer sheath 212. The conductor 211 is disposed within the insulating outer sheath 212. An external working fluid cavity 21c is formed between the conductor 211 and the insulating outer sheath 212 along the cable extension direction. An internal working fluid cavity 21d is formed in the middle of the conductor 211 along the cable extension direction. That is, the working fluid cavity of the power line 21 includes an external working fluid cavity 21c and an internal working fluid cavity 21d. After the working fluid enters the power line 21 through the liquid cooling pipe 25, it flows into the external working fluid cavity 21c and the internal working fluid cavity 21d respectively, and simultaneously contacts and exchanges heat with the inner and outer surfaces of the conductor, which can effectively improve the heat dissipation efficiency of the power line 21.

[0041] In possible implementations, there may be multiple working fluid cavities, rather than being limited to the two shown in the figure. For example, but not limited to, at least one of the multiple working fluid cavities may be located inside conductor 211, and at least one of the multiple working fluid cavities may be located between conductor 211 and insulating outer sheath 212.

[0042] For example, in the case where multiple working fluid cavities are provided inside the conductor 211, each working fluid cavity can be evenly distributed around the center of the conductor, or each working fluid cavity can be irregularly arranged inside the conductor, as long as it can increase the heat exchange area between the working fluid and the conductor. The embodiments of this application are not limited.

[0043] Optionally, in order to ensure a reliable flow state in the internal working fluid cavity 21d when the power line 21 is compressed, a hollow support member 2111 can be provided in the internal working fluid cavity 21d. The support member 2111 abuts against the inner wall of the internal working fluid cavity 21d to form physical support, which can prevent the internal working fluid cavity 21d from being blocked when compressed.

[0044] In specific implementations, the support member 2111 can be a rigid hollow tube or a spring structure. This application does not limit the specific implementation.

[0045] In a practical implementation, the working fluid inlet 21a can be located on the same side as the power terminal, i.e., at the head of the charging gun module. The low-temperature working fluid entering the power line 21 first exchanges heat with the power terminal 213, carrying away the heat generated by the power terminal 213 with its relatively high contact resistance during charging. Then, it flows along the working fluid cavity, carrying away the heat generated by the conductor. In this way, while improving heat dissipation efficiency, the heat dissipation bottleneck at the power terminal is also addressed.

[0046] In other possible implementations, the working fluid inlet 21a and the power terminal can be located at both ends of the power line 21 (not shown in the figure). That is, the working fluid inlet 21a is located at the tail of the charging gun module, and the working fluid outlet 21b is located at the head of the charging gun module. The working fluid outlets 21b of the two power lines 21 are connected, and the completed working fluid flows back to the main body 30 through the liquid cooling pipe. In comparison, the implementation where the working fluid inlet 21a and the power terminal are located at the head of the charging gun module can achieve effective heat dissipation at the power terminal.

[0047] Please see also Figure 6 , Figure 7 and Figure 8 ,in, Figure 6 This is a schematic diagram illustrating the assembly relationship between the power line and the power terminal provided in an embodiment of this application. Figure 7 for Figure 6 The exploded view of the assembly of the power lines and power terminals shown in the figure. Figure 8 for Figure 6 The diagram shows the assembly relationship of the power terminals.

[0048] like Figure 6 and Figure 7As shown, power terminal 213 is connected to one side of core 215, and conductor 211 and insulating outer sheath 212 are connected to the other side of core 215. Core 215 serves as the assembly base for conductor 211, insulating outer sheath 212, and power terminal 213 of power line 21, and also functions as a guide and shunt for the liquid cooling fluid. For ease of description, the side of core 215 used for connection to power terminal 213 is defined as the first side, and the other side of core 215 used for connection to conductor 211 and insulating outer sheath 212 is defined as the second side.

[0049] The core 215 is provided with a liquid inlet 2151, and a connector 216 for communicating with a liquid cooling pipe is installed on the liquid inlet 2151. The core 215 has a working fluid cavity connected to the liquid inlet 2151. This working fluid cavity can be connected to the power terminal 213 located on the first side of the core 215, and the external working fluid cavity 21c and the internal working fluid cavity 21d located on the second side of the core 215. Figure 8 As shown, the core 215 has a cavity 2152 communicating with the liquid inlet 2151. The opening of the cavity 2152 is located on the first side surface of the core 215. The power terminal 213 is inserted into the cavity 2152, and the insertion side of the power terminal 213 has an inlet cavity 2131 so that the working fluid enters the inlet cavity 2131 of the power terminal 213 to achieve contact heat exchange.

[0050] The core 215 has a through hole 2153 extending from its first end face to its second end face. The opening of the through hole 2153 on the first side can communicate with the cavity 2152 so that the working fluid can flow to the second side through the through hole 2153.

[0051] During operation, the liquid cooling working fluid that enters the cavity 2152 of the core 215 through the connector 216 first flows to the inlet cavity 2131 of the power terminal 213. After exchanging heat with the power terminal 213, it flows to the through hole 2153 and then enters the outer working fluid cavity 21c and the inner working fluid cavity 21d located on the second side of the core 215, respectively. After exchanging heat with the conductor 211, the liquid cooling working fluid flows back to the main body of the equipment.

[0052] To ensure sufficient heat exchange between the working fluid and the power terminal, a guide portion 2154 may be optionally provided within the cavity 2152. The inner end of the guide portion 2154 is fixed to the bottom wall of the cavity 2152, and the outer end of the guide portion 2154 is located in the inlet cavity 2131 of the power terminal 213. The guide portion 2154 is spaced apart from both the side wall of the cavity 2152 and the side wall of the inlet cavity 2131 to form a flow channel 21e. Thus, based on the flow guiding effect of the guide portion 2154, the working fluid entering the cavity 2152 reaches the inner side of the inlet cavity 2131, i.e., the head of the power terminal 213, via the flow channel 21e.

[0053] Correspondingly, the opening of the through hole 2153 on the first side is flush with the extended end of the guide portion 2154, that is, located on the extended end face of the guide portion 2154. The through hole 2153 is connected to the cavity 2152 through the inlet cavity 2131. In this way, after the working fluid and the power terminal 213 have fully exchanged heat, it flows to the working fluid cavity of the power line 21 through the through hole 2153.

[0054] The guide section 2154 can be Figure 8 The tubular structure shown has a section of the through hole 2153 near the first side formed by the wall of the tubular guide portion 2154. In a specific implementation, the tubular guide portion 2154 can be integrally formed with the core 215, or it can be independently formed and then fixedly mounted on the bottom wall of the cavity 2152.

[0055] In other possible implementations, the guide portion 2154 can also adopt other structural forms, as long as it can guide the working fluid to the inside of the inlet cavity 2131. This application embodiment is not limited.

[0056] The second side of the core 215 has a first connecting portion 2156 and a second connecting portion 2157, with the second connecting portion 2157 being radially close to the through hole 2153 relative to the first connecting portion 2156; wherein, the first connecting portion 2156 is used to assemble the insulating outer sheath 212, and the conductor 211 is connected to the second connecting portion 2157.

[0057] The core 215 also has a diversion hole 2155 communicating with the through hole 2153. The diversion hole 2155 communicates with the external working fluid cavity 21c between the insulating outer sheath 212 and the conductor 211. The through hole 2153 communicates with the internal working fluid cavity 21d in the middle of the conductor 211 through an opening located on the second side. Overall, the working fluid channel in the core 215 is composed of a cavity 2152, a through hole 2153, and a diversion hole 2155. The working fluid can flow into the external working fluid cavity 21c and the internal working fluid cavity 21d respectively, and simultaneously conduct contact heat exchange with the inner and outer surfaces of the conductor 211, effectively improving the heat exchange efficiency.

[0058] It should be noted that, in other possible implementations, the working fluid cavity within the core 215 can adopt different structural forms as needed, rather than being limited to the arrangement shown in the figure.

[0059] To establish a reliable connection between the diversion orifice 2155 and the external working fluid chamber 21c, optionally, the insulating outer sheath 212 can be fixed to the first connecting portion 2156 of the core 215 via a liner 217. (See also...) Figure 6 , Figure 7 and Figure 9 ,in, Figure 9 The axial cross-sectional view of the power line provided in the embodiments of this application.

[0060] The first end of the liner 217 is connected to the first connecting portion 2156 of the core 215, and the first tube segment 2171 at its first end is spaced apart from the opening of the diversion hole 2155 and the outer peripheral surface of the conductor 211 to form a diversion channel 21f; the second tube segment 2172 at the second end of the liner 217 is nested between the insulating outer sheath 212 and the conductor 211, and the inner wall surface 2174 of the second tube segment 2172 can be in contact with the outer surface of the conductor 211, for example, but not limited to forming radial positioning; please refer to Figure 10 and Figure 11 ,in, Figure 10 This is a schematic diagram of the structure of a liner provided in an embodiment of this application. Figure 11 for Figure 10 The axial sectional view of the liner shown.

[0061] Meanwhile, the inner wall surface 2174 of the second pipe section 2172 has a liquid guiding groove 2173 that extends through the cable extension direction, so that the working fluid can flow through the liquid guiding groove 2173 to the external working fluid cavity 21c, establishing a conductive path between the diversion channel 21f and the external working fluid cavity 21c on the outer periphery of the conductor 211. The conductor 211 is fitted onto the second connecting part 2157 of the core 215 to establish a conductive path between the through hole 2153 and the internal working fluid cavity 21d in the middle of the conductor 211.

[0062] As shown in the figure, the liquid guiding groove 2173 is a straight groove arranged along the cable extension direction, and is illustrated by four circumferentially evenly distributed liquid guiding grooves 2173. It is understood that in possible implementations, the liquid guiding groove 2173 can also adopt other structural forms, such as, but not limited to, spiral grooves formed on the inner wall surface 2174 of the second pipe section 2172, as long as the functional requirement of connecting the diversion channel 21f and the external working fluid chamber 21c is met. This application embodiment does not limit this. In other possible implementations, the number of liquid guiding grooves 2173 can be determined according to the overall product design, for example, but not limited to, one or more other grooves, rather than being limited to the four straight grooves shown in the figure.

[0063] In addition, to ensure the structural strength of the core, the second side of the core 215 may optionally be... Figure 8 The stepped shaft shown is composed of a large-diameter section 2158a, a medium-diameter section 2158b, and a small-diameter section 2158c arranged sequentially towards the ends. A first connecting portion 2156 is located in the large-diameter section 2158a and is used to fix the first end of the liner 217. A second connecting portion 2157 is located in the small-diameter section 2158c, on which the conductor 211 is fitted and fixed. A diversion hole 2155 is located in the medium-diameter section 2158b.

[0064] In this way, the diversion hole 2155 can extend radially to the outer peripheral surface of the intermediate diameter section 2158b, the cross-sectional dimension of which is larger than that of the minor diameter section 2158c. The radially formed multiple diversion holes 2155 also possess reliable load-bearing strength. In possible implementations, the diversion hole 2155 is not limited to being formed radially; any hole that can connect from the through hole 2153 to the outer peripheral surface of the intermediate diameter section 2158b, establishing a path for the working fluid to divert, is acceptable. This application does not limit the specific implementation.

[0065] To improve the assembly processability of the liner, optionally, the first end of the liner 217 and the core 215 can be connected using... Figure 6 The nut 218 shown enables a detachable connection; for the second end of the liner 217 and the insulating outer sheath 212, a detachable connection can be achieved. Figure 6 The clamping ring 220 shown enables a detachable connection.

[0066] Combination Figure 6 , Figure 7 and Figure 9 As shown, the first connecting portion 2156 of the core 215 has an external thread that is adapted to the nut 218, that is, the external thread is provided on the outer peripheral surface of the large diameter section 2158a; the end of the nut 218 near the liner 217 has a radially inwardly disposed locking portion 2181; correspondingly, the end of the liner 217 near the nut 218 has a radially outwardly disposed stop portion 2175; the inner diameter of the locking portion 2181 is larger than the outer diameter of the liner 217 and smaller than the outer diameter of the stop portion 2175.

[0067] The locking part 2181 of the nut 218 is fitted onto the first section 2171 of the liner 217 and tightened with the external thread of the first connecting part 2156. The locking part 2181 axially drives the locking part 2181 of the liner 217 until the locking part 2181 presses against the stepped surface of the large-diameter section 2158a, thereby assembling and fixing the liner 217. In this state, based on the structural rigidity of the liner 217, the liner 217 can maintain a certain relative positional relationship with the orifice of the diversion hole 2155 in the radial direction to ensure a reliable flow state.

[0068] Furthermore, a seal 219 can be provided between the locking part 2181 of the liner 217 and the stepped surface of the large diameter section 2158a. After assembly, a seal is formed at the fixed connection position between the liner 217 and the core 215, which can prevent the working fluid from overflowing in the assembly gap of the parts.

[0069] In a specific implementation, a sealing groove 2176 can be formed on the outer end face of the stop portion 2175 of the liner 217. The sealing element 219 is disposed in the sealing groove 2176 and can deform when the locking portion 2181 is pressed against the stepped surface of the large-diameter section 2158a, thereby forming the aforementioned sealing relationship. In other possible implementations, the sealing groove for installing the sealing element can also be disposed in reverse on the stepped surface of the large-diameter section 2158a (not shown in the figure), which can also form the aforementioned sealing relationship.

[0070] For example Figure 6 , Figure 7 and Figure 9 As shown, the insulating outer sheath 212 is fitted onto the small-diameter section 2158c of the liner 217 and fixed to the liner 217 by a clamping ring 220. The insulating outer sheath 212 deforms under pressure, forming a good seal. In specific implementations, the clamping ring 220 can be implemented using existing technology, so it will not be described in detail here.

[0071] Furthermore, for the electrode with a sealed connection at the end of the power line 21, the conductor 211 is electrically connected to the electrode 214, and the insulating outer sheath 212 is sealed to the electrode 214. Different structural forms can be used to achieve this. This application does not limit the specific implementation.

[0072] In the heat dissipation architecture described in the aforementioned implementation scheme, taking one liquid cooling pipe and two power lines as an example, the liquid cooling pipe provides liquid cooling fluid to the two power lines. In possible implementations, in addition to the power lines, the liquid cooling pipe can also simultaneously provide liquid cooling fluid to other cables inside the insulating jacket. For example, but not limited to, the signal line 23 of the charging cable assembly 20 is also a liquid-cooled cable with a working fluid chamber. The liquid cooling pipe is also connected to the working fluid chamber inlet of the signal line 23. After the liquid cooling fluid exchanges heat with the conductor of the signal line, it flows back to the main body of the device through the working fluid chamber inlet of the signal line 23.

[0073] In other possible implementations, two or more liquid cooling pipes can be set up, each providing liquid cooling medium to the working fluid chambers of at least two cables to achieve liquid cooling heat dissipation.

[0074] The charging gun module described in the foregoing embodiments can be applied to different charging power scenarios that require good heat dissipation capabilities, such as, but not limited to, cable current carrying capacity of 800A or more, to meet the needs of using larger charging power and achieve fast charging.

[0075] In specific implementations, the main body 30 of the charging device 100 can be a public charging station or a home charging pile. It should be understood that other functions of the corresponding charging device are not the core inventive points of this application, and can be implemented by those skilled in the art based on existing technology, so they will not be described in detail here.

[0076] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A charging gun module, characterized in that, The device includes a charging gun and a charging cable assembly connected together. The charging cable assembly includes an insulating jacket, and two power lines, several signal lines, and a liquid cooling pipe located inside the insulating jacket. The power lines are provided with power terminals at their ends, and the signal lines are provided with signal terminals at their ends. The power terminals and the signal terminals are located at the insertion end of the charging gun. The power line includes a working fluid chamber, one end of the liquid cooling pipe is connected to the liquid inlet of the working fluid chamber of at least two power lines respectively, the other end of the liquid cooling pipe is used to input liquid cooling working fluid, and the liquid outlet of the working fluid chamber of the two power lines is used to output liquid cooling working fluid. The power line includes a conductor and an insulating outer sheath, and the working fluid cavity is configured as a plurality of such cavities, at least one of which is located inside the conductor and at least one of which is located between the conductor and the insulating outer sheath; A core is provided between the power terminal of the power line and the conductor and the insulating outer sheath. The core is provided with a liquid inlet and a working fluid channel. The working fluid channel includes a cavity, a through hole and a diversion hole connected in sequence. The power line also includes a liner, which includes a first tube segment and a second tube segment. One side of the first tube segment is spaced apart from the opening of the diversion hole and the outer peripheral surface of the conductor. The other side of the first tube segment is connected to one side of the second tube segment. The other side of the second tube segment is nested between the insulating outer sheath and the conductor. The inner wall of the second tube segment abuts against the outer surface of the conductor and its inner wall has a liquid guiding groove that extends through the cable extension direction.

2. The charging gun module according to claim 1, characterized in that, The working fluid inlet and the power terminal are located at the same end of the power line.

3. The charging gun module according to claim 1 or 2, characterized in that, A hollow support is provided inside the internal working fluid cavity, and the support abuts against the inner wall of the internal working fluid cavity.

4. The charging gun module according to claim 1, characterized in that, The power terminal is connected to the first side of the core, and the conductor and the insulating outer layer are connected to the second side of the core; the liquid inlet can be connected to the liquid cooling pipe, and the working fluid cavity is connected to the liquid inlet; and the working fluid cavity can be connected to the power terminal located on the first side of the core and the working fluid cavity located on the second side of the core, respectively.

5. The charging gun module according to claim 4, characterized in that, The cavity is connected to the liquid inlet, and the power terminal is inserted and fixed to the cavity; the orifice on one side of the through hole is connected to the cavity, and the through hole is connected to the internal working fluid cavity in the middle of the conductor through the orifice on the other side; the diversion hole is connected to the external working fluid cavity between the insulating outer sheath and the conductor.

6. The charging gun module according to claim 5, characterized in that, The power terminal has an insertion cavity on its insertion side. A guide portion is provided in the cavity of the core. The extended end of the guide portion is located in the insertion cavity of the power terminal. A flow channel is formed between the guide portion, the cavity, and the insertion cavity. The orifice of the through hole on the first side is located on the extended end face of the guide portion.

7. The charging gun module according to claim 5 or 6, characterized in that, The second side of the core has a first connecting portion and a second connecting portion, the second connecting portion being radially close to the through hole relative to the first connecting portion; wherein, the first connecting portion is used to fix the insulating outer sheath, and the conductor is connected to the second connecting portion.

8. A charging device, characterized in that, The device includes a main body and a charging gun module connected to the main body. The charging gun module adopts the charging gun module according to any one of claims 1 to 7. The main body includes a radiator, a liquid storage tank and a liquid pump. The inlet of the radiator is connected to the liquid outlet of the working fluid chamber of the power line, and the outlet of the radiator is connected to the liquid storage tank. The liquid pump's intake port is connected to the inside of the liquid storage tank, and the liquid pump's outlet port is connected to the other end of the liquid cooling pipe.

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