Liquid-cooled cable

Abstract

The embodiment of the present application discloses a liquid cooling cable. The liquid cooling cable comprises an insulating outer sheath, a conductor and a terminal assembly, the conductor and the insulating outer sheath have an external working medium cavity therebetween, and the conductor has an internal working medium cavity in the middle part; wherein the terminal assembly comprises a terminal and a core body, the terminal is connected to the first end of the core body, and the conductor and the insulating outer sheath are connected to the second end of the core body; the core body is provided with a liquid inlet and a working medium cavity channel, the liquid inlet is used for communicating with a liquid cooling pipe, the working medium cavity channel communicates with the liquid inlet, and the working medium cavity channel can respectively communicate to the terminal and the external working medium cavity and the internal working medium cavity. In this way, the core body is used as the assembly basic component of the conductor, the insulating outer sheath and the terminal, and simultaneously has the flow guiding and flow dividing functions of the liquid cooling working medium. Based on the terminal assembly, the working medium can contact and exchange heat with the inner and outer surfaces of the conductor at the same time, and the heat exchange efficiency can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of charging equipment technology, and in particular to a liquid-cooled cable. 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 cables and terminals 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. A typical liquid-cooled cable terminal includes a terminal housing and a pin core. The pin core is inserted into the terminal housing, and the insertion side of the pin core has an axial channel communicating with the terminal housing. A solid conductor is connected to the tail end of the pin core. A liquid cooling pipe, fitted outside the conductor, is fixed to the terminal housing. The annular flow channel between the liquid cooling pipe and the conductor communicates with the axial channel of the pin core, and an external interface is provided on the terminal housing. This terminal structure can only achieve single-sided cooling with the solid conductor, and the contact area between the liquid cooling medium and the conductor is limited, resulting in low heat dissipation efficiency. Summary of the Invention

[0004] This application provides a liquid-cooled cable that can effectively improve the heat dissipation efficiency of the cable.

[0005] The first aspect of this application provides a liquid-cooled cable for a charging gun module. The liquid-cooled cable includes an insulating outer sheath, a conductor, and a terminal assembly. The conductor and the insulating outer sheath are nested together, with an external working fluid cavity between them. An internal working fluid cavity is located in the middle of the conductor, and both the external and internal working fluid cavities are positioned along the cable's extension direction. The terminal assembly includes a terminal for connection to a charging socket and a core. The terminal is connected to a first end of the core, and the conductor and the insulating outer sheath are connected to a second end of the core. The core has a liquid inlet and a working fluid channel. The liquid inlet is used to input liquid cooling fluid, and the working fluid channel communicates with the liquid inlet and can connect to the terminal, the external working fluid cavity, and the internal working fluid cavity, respectively. That is, the liquid cooling fluid in the working fluid channel can contact and exchange heat with the terminal, and the working fluid channel can communicate with both the external and internal working fluid cavities. With this configuration, the core serves as the basic assembly component for the conductor, insulating outer sheath, and terminal, while also acting as a guide and distributor for the liquid cooling fluid. After the working fluid enters the working fluid cavity through the liquid inlet, it first contacts and exchanges heat with the terminal, and then flows to the second side through the through hole. The working fluid is split on the second side of the core. Based on this terminal assembly, the working fluid can contact and exchange heat with the inner and outer surfaces of the conductor at the same time, which can effectively improve the heat exchange efficiency.

[0006] Based on the first aspect, this application also provides a first implementation of the first aspect: the working fluid channel includes a cavity, a through hole, and a diversion hole connected in sequence; wherein, the cavity is connected to the liquid inlet, and the 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 communicates with the internal working fluid cavity in the middle of the conductor through the orifice on the second side, the diversion hole intersects with the through hole, and the diversion hole communicates with the external working fluid cavity between the insulating outer sheath and the conductor. In this way, the internal space of the core can be fully utilized to realize the layout of the working fluid channel, the structural integration is high, and it has good processability.

[0007] Based on the first embodiment of the first aspect, this application also provides a second embodiment of the first aspect: the terminal has an inlet cavity, and a guide portion is provided in the cavity of the core. One end of the guide portion extends into the inlet cavity to form an outward end, and a flow channel is formed between the guide portion and the side wall of the cavity and the side wall of the inlet cavity. The orifice of the through hole on one side communicates with the orifice of the inlet cavity. In this way, the working fluid can reach the inside of the terminal for sufficient heat exchange, and then flow to the working fluid cavity of the cable through the through hole, thereby maximizing the use of low-temperature working fluid to improve the heat dissipation capacity of the terminal side and supporting application scenarios with higher charging power.

[0008] Based on the second embodiment of the first aspect, this application also provides a third embodiment of the first aspect: the guide portion is a tubular structure, and the portion of the through hole near the terminal is formed by the hole wall of the tubular guide portion. This provides better structural integration.

[0009] Based on the first, second, or third implementation of the first aspect, this application also provides a fourth implementation of the first aspect: the second end of the core includes 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.

[0010] Based on the first, second, or third implementation of the first aspect, this application also provides a fourth implementation of the first aspect: the terminal assembly further includes a liner, which includes a first segment and a second segment. One side of the first segment is spaced apart from the orifice of the diversion hole and the outer peripheral surface of the conductor. The other side of the first segment is connected to one side of the second segment. The other side of the second segment is nested between the insulating outer sheath and the conductor. The inner wall of the second segment abuts against the outer surface of the conductor to form a radial positioning, and its inner wall has a liquid guiding groove that extends through the cable extension direction. With this configuration, the liquid flows through the liquid guiding groove to the external working fluid cavity, establishing a conductive path between the diversion 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 diversion hole in the radial direction to obtain a stable and reliable flow state.

[0011] Based on the fourth embodiment of the first aspect, this application also provides a fifth embodiment of the first aspect: the second end 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, and the diversion hole extends radially to the outer peripheral surface of the medium-diameter section; a second connecting part is located in the small-diameter section, and the 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 the medium-diameter section is larger than the cross-sectional dimension of the small-diameter section, and multiple diversion holes opened radially can also have reliable load-bearing strength.

[0012] In practical applications, the diversion holes can be configured as multiple holes spaced apart circumferentially.

[0013] Based on the fifth embodiment of the first aspect, this application also provides a sixth embodiment of the first aspect: the terminal assembly further includes a nut, the first connecting portion of the core has an external thread adapted to the nut, and the end of the nut near the liner has a radially inwardly disposed locking portion, which is fitted onto the first section of the liner; correspondingly, the end of the liner near the nut has a radially outwardly disposed stop portion, and when the nut is tightened with the external thread of the first connecting portion, the locking portion can axially drive the locking portion to press against the stepped surface of the large-diameter section. The structure is simple and reliable, and has good operability.

[0014] Based on the sixth embodiment of the first aspect, this application also provides a seventh embodiment of the first aspect: a sealing element is provided between the locking portion of the liner and the stepped surface of the large-diameter section. After assembly, a seal is formed at the fixed connection position between the liner and the core, which can prevent the working fluid from leaking out during the assembly gap of the parts.

[0015] For example, a sealing groove may be formed on the outer end face of the stop portion of the liner, and a sealing element is disposed in the sealing groove to form the aforementioned sealing relationship. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a charging device provided in an embodiment of this application;

[0017] Figure 2 A schematic diagram of a charging cable assembly provided in an embodiment of this application;

[0018] Figure 3 A schematic diagram of a heat dissipation architecture for a charging cable assembly provided in an embodiment of this application;

[0019] Figure 4 for Figure 1 A cross-sectional schematic diagram of the charging cable assembly shown;

[0020] Figure 5 for Figure 4 The diagram shows a schematic of the power line structure.

[0021] Figure 6 This is a schematic diagram of the assembly relationship of a power line provided in an embodiment of this application;

[0022] Figure 7 for Figure 6 An exploded view of the assembly of the power lines shown in the diagram;

[0023] Figure 8 for Figure 6 A schematic diagram of the assembly relationship of the terminal components shown;

[0024] Figure 9 for Figure 6 An axial sectional view of the power line shown;

[0025] Figure 10 This is a schematic diagram of the structure of a liner provided in an embodiment of this application;

[0026] Figure 11 for Figure 10 The axial sectional view of the liner shown. Detailed Implementation

[0027] 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.

[0028] like Figure 1 As 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 vehicle side (not shown) 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 the 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 30 side to transmit DC power to the power battery on the vehicle side, thereby achieving fast charging.

[0029] 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 chamber. Its head end and tail end are respectively sealed and connected to the terminal 213 and the electrode 214. The 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.

[0030] 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 an embodiment of this application.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] The power line 21 includes a conductor 211 and an insulating outer sheath 212 nested together. 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] In a practical implementation, the working fluid inlet 21a can be located on the same side as the 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 terminal 213, carrying away the heat generated by the terminal 213, which has a 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, it also addresses the heat dissipation bottleneck problem at the terminal.

[0041] In other possible implementations, the working fluid inlet 21a and the 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 terminal are located at the head of the charging gun module can achieve effective heat dissipation at the terminal.

[0042] 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 terminal provided in an embodiment of this application. Figure 7 for Figure 6 An exploded view of the assembly of the power lines and terminals shown. Figure 8 for Figure 6 The diagram shows the assembly relationship of the terminal components.

[0043] like Figure 6 and Figure 7As shown, the terminal 213 of the terminal assembly is connected to one side of the core 215, and the conductor 211 and the insulating outer sheath 212 are connected to the other side of the core 215. The core 215 serves as the basic assembly component for the conductor 211, the insulating outer sheath 212, and the terminal 213 of the power line 21, and also functions as a guide and shunt for the liquid cooling fluid. For ease of description, the end of the core 215 used to connect to the terminal 213 is defined as the first end, and the other end of the core 215 used to connect to the conductor 211 and the insulating outer sheath 212 is defined as the second end.

[0044] 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 a terminal 213 located at the first end of the core 215, and an external working fluid cavity 21c and an internal working fluid cavity 21d located at the second end 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 end surface of the core 215. The terminal 213 is inserted into the cavity 2152, and the insertion side of the terminal 213 has an inlet cavity 2131 so that the working fluid enters the inlet cavity 2131 of the terminal 213 to achieve contact heat exchange.

[0045] The core 215 has a through hole 2153 extending from its first end to its second end. The opening of the through hole 2153 on one side can communicate with the cavity 2152 so that the working fluid can flow through the through hole 2153 to the other side. The through hole 2153 communicates with the internal working fluid cavity 21d through the opening on the other side.

[0046] 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 enters the outer working fluid cavity 21c and the inner working fluid cavity 21d located on the second end 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.

[0047] To ensure sufficient heat exchange between the working fluid and the 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 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 terminal 213, via the flow channel 21e.

[0048] Correspondingly, the opening of the through hole 2153 on one side is flush with the extended end of the guide portion 2154, that is, it 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 terminal 213 have fully exchanged heat, it flows to the working fluid cavity of the power line 21 through the through hole 2153.

[0049] The guide section 2154 can be Figure 8 The tubular structure shown has a section of the through hole 2153 near the terminal 213 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.

[0050] 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.

[0051] The second end of the core 215 has a first connecting portion 2156 and a second connecting portion 2157. The second connecting portion 2157 is arranged radially close to the through hole 2153 relative to the first connecting portion 2156. 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.

[0052] 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 on the other 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.

[0053] 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.

[0054] To establish a reliable connection between the shunt 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 the bushing 217 of the terminal assembly. (See also...) Figure 6 , Figure 7 and Figure 9 ,in, Figure 9The axial cross-sectional view of the power line provided in the embodiments of this application.

[0055] 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 abut against 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.

[0056] 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.

[0057] 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.

[0058] In addition, to ensure the structural strength of the core, the second end 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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 liquid-cooled cable for use in a charging gun module, characterized in that, The cable includes an insulating outer sheath, a conductor, and a terminal assembly. The conductor and the insulating outer sheath are nested inside each other, with an external working fluid cavity between them. The conductor has an internal working fluid cavity in its middle section. Both the external working fluid cavity and the internal working fluid cavity are arranged along the cable extension direction. The terminal assembly includes a terminal and a core. The terminal is connected to a first end of the core, and the conductor and the insulating outer casing are connected to a second end of the core. The core is provided with a liquid inlet and a working fluid channel. The liquid inlet is used to input liquid cooling working fluid, and the working fluid channel is connected to the liquid inlet. The liquid cooling working fluid in the working fluid channel contacts and exchanges heat with the terminal. The working fluid channel is also connected to the external working fluid channel and the internal working fluid channel. After the liquid cooling working fluid enters the liquid-cooled cable, it flows into the external working fluid channel and the internal working fluid channel, respectively. The working fluid channel includes a cavity, a through hole, and a diversion hole; the working fluid channel is connected to the liquid inlet through the cavity, and the terminal is inserted and fixed to the cavity; 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 other side; the diversion hole intersects with the through hole, and the diversion hole is connected to the external working fluid cavity between the insulating outer sheath and the conductor.

2. The liquid-cooled cable according to claim 1, characterized in that, The core has a guide portion inside its cavity, and the terminal has an inlet cavity. One end of the guide portion extends into the inlet cavity to form an outward end. A flow channel is formed between the guide portion, the cavity, and the inlet cavity. The orifice of the through hole on one side communicates with the inlet cavity.

3. The liquid-cooled cable according to claim 2, characterized in that, The guide portion is a tubular structure, and the portion of the through hole near the terminal is formed by the hole wall of the tubular guide portion.

4. The liquid-cooled cable according to any one of claims 1 to 3, characterized in that, The second end of the core includes 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.

5. The liquid-cooled cable according to claim 4, characterized in that, The terminal assembly 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 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 surface of the second tube segment abuts against the outer surface of the conductor and its inner wall surface has a liquid guiding groove that extends through the cable extension direction.

6. The liquid-cooled cable according to claim 5, characterized in that, The second end of the core is a stepped shaft, which includes a large diameter section, a medium diameter section and a small diameter section arranged sequentially toward the end; the first connecting part is located in the large diameter section; the diversion hole is located in the medium diameter section and extends radially to the outer peripheral surface of the medium diameter section; the second connecting part is located in the small diameter section, and the conductor sleeve is fixed on the small diameter section.

7. The liquid-cooled cable according to claim 6, characterized in that, The diversion holes are configured as multiple holes spaced apart circumferentially.

8. The liquid-cooled cable according to claim 6, characterized in that, The terminal assembly also includes a nut, the first connecting portion of the core has an external thread adapted to the nut, the end of the nut near the liner has a radially inwardly disposed locking portion, the locking portion is fitted onto the first section of the liner; correspondingly, the end of the liner near the nut has a radially outwardly disposed stop portion, when the nut is tightened with the external thread of the first connecting portion, the locking portion can axially drive the locking portion to press against the stepped surface of the large diameter section.

9. The liquid-cooled cable according to claim 8, characterized in that, A sealing element is provided between the locking part of the liner and the stepped surface of the large-diameter section.

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