Charging and discharging connection device, charging device and electric device

Abstract

The invention relates to the field of charging, and discloses a charging and discharging connection device, a charging device and a power utilization device. The charging and discharging connection device comprises a housing which is internally provided with a cavity and is provided with a first opening and a second opening, and the first opening and the second opening are both communicated with the cavity; one end of the wire is arranged in the cavity, and the other end penetrates through the first opening; one end of the power terminal is arranged in the cavity and connected with the wire, and the other end of the power terminal can be electrically connected with the power utilization device or the charging device through the second opening; and the insulated phase change material is filled in the cavity and is connected with at least one of the wire and the power terminal in a heat conduction manner. According to the charging and discharging connecting device, the cavity of the shell can be filled with the insulated phase-change material, that is, the part of the power terminal, the part of the wire and the connecting position of the power terminal and the wire are wrapped by the insulated phase-change material, and when heat is generated in the high-power charging process, the phase-change material can absorb the heat and generate phase change, so that the temperature of the charging and discharging connecting device is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a charging and discharging connection device, a charging device and an electricity-consuming device. Background Art

[0002] Against the backdrop of the rapid development of the new energy industry, high-power charging technology, with its advantages of efficiency and convenience, has become one of the key technologies to enhance user charging experience and promote industry development.

[0003] During high-power charging, high currents flowing through charging and discharging connections, such as fast-charging connectors, charging guns, or charging sockets, generate significant heat, causing the temperature of the devices to rise sharply. Excessive heat and temperature not only accelerate the aging of materials in the charging and discharging connection devices, reducing their service life, but can also cause problems such as reduced insulation performance and poor contact, thereby affecting charging stability and safety.

[0004] In order to improve the problem of excessive temperature, the charge and discharge connection device in the related art adopts the method of increasing the metal heat conduction area or optimizing the contact structure to control the temperature rise, but the heat dissipation effect is poor. Summary of the Invention

[0005] In view of this, the present invention provides a charge-discharge connection device, a charging device, and an electrical device to solve or improve the problem of poor heat dissipation effect of the charge-discharge connection device in the related art.

[0006] In a first aspect, the present invention provides a charge-discharge connection device, comprising:

[0007] A housing having a chamber therein, the housing being provided with a first opening and a second opening, wherein the first opening and the second opening are both in communication with the chamber;

[0008] a wire, one end of which is disposed in the chamber and the other end of which passes through the first opening;

[0009] a power terminal, one end of which is disposed in the cavity and connected to the wire, and the other end of which is electrically connected to an electrical device or a charging device through the second opening;

[0010] An insulating phase change material is filled in the cavity and is thermally conductively connected to at least one of the wire and the power terminal.

[0011] In an optional embodiment, the housing is provided with a first entrance and exit for allowing the phase change material to pass through, and the charge and discharge connection device further includes a first blocking member, which is connected to the housing and is used to open and close the first entrance and exit.

[0012] In an optional embodiment, the housing is further provided with a third opening, the connection position of the power terminal and the wire is arranged opposite to the third opening, and the charge-discharge connection device further includes an insulating heat-conducting member and a hollow cooling shell;

[0013] The insulating heat-conducting part is arranged at the connection position and opposite to the third opening, the cooling shell and the outer shell are provided with phase change material, one end of the cooling shell is arranged outside the cavity, and the other end passes through the third opening and abuts against the insulating heat-conducting part.

[0014] In an optional embodiment, a heat-conducting column is provided on the inner wall of the cooling shell near the connection position.

[0015] In an optional embodiment, the housing is further provided with a third opening, and the charge-discharge connection device further comprises a hollow cooling shell;

[0016] The cooling shell is filled with insulating phase change material, and is provided with a communication port connected to the interior of the cooling shell. The cooling shell is connected to the outer shell and is at least partially arranged outside the cavity, and the communication port is connected to the third opening.

[0017] In an optional embodiment, a portion of the cooling shell located outside the chamber is provided with a second entrance and exit, the second entrance and exit being used for allowing the phase change material to pass through, and the charge and discharge connection device further includes a second blocking member connected to the cooling shell and used for opening and closing the second entrance and exit;

[0018] And / or, an annular groove is provided on the cooling shell, the annular groove is arranged around the circumference of the third opening, and the annular groove passes through the end surface of the cooling shell close to the outer shell, at least a portion of the annular groove is provided in the third opening, and a sealing member is provided between the annular groove and the third opening;

[0019] And / or, the cooling shell is detachably connected to the outer shell.

[0020] In an optional embodiment, the housing includes a first tube body, the tube mouth of the first tube body forms the first opening, and the charge and discharge connection device further includes a cover and a sealing ring;

[0021] The cover is sleeved on the wire and sleeved on the outside of the tube opening of the first tube body. The sealing ring is sealed between the wire and the first tube body. The cover limits the sealing ring along the axial direction of the wire.

[0022] In an optional embodiment, the wire has an axially extending flow channel inside, and the flow channel is used to fill the phase change material;

[0023] And / or, the wire has a flow channel extending in the axial direction inside, the flow channel is communicated with the cavity and is used to be filled with an insulating phase change material.

[0024] In a second aspect, the present invention further provides a charging device comprising the charging and discharging connection device as described above.

[0025] In a third aspect, the present invention further provides an electrical device comprising the charging and discharging connection device as described above.

[0026] The charge and discharge connection device provided by the present invention can fill the cavity of the shell with insulating phase change material, that is, the power terminal part, the wire part and the connection position of the two are all wrapped by insulating phase change material. When heat is generated during high-power charging, the phase change material can absorb the heat and undergo phase change, thereby effectively reducing the temperature of the charge and discharge connection device, thereby avoiding problems such as material aging, insulation performance degradation, poor contact, etc. caused by excessive temperature, and improving the stability and safety of the charge and discharge connection device.

[0027] The charging device and the power-consuming device provided by the present invention include the charging and discharging connection device provided by the present invention, and thus simultaneously include all the advantages of the charging and discharging connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of a charge-discharge connection device provided by an embodiment of the present invention;

[0030] Figure 2 for Figure 1 The structural exploded diagram of the charging and discharging connection device shown;

[0031] Figure 3 for Figure 1 A schematic diagram of the relative positional relationship between the cooling shell and the installation position of the charging and discharging connection device shown;

[0032] Figure 4 for Figure 3 Exploded view of the structure of the view shown;

[0033] Figure 5 A schematic structural diagram of another charging and discharging connection device provided in an embodiment of the present invention;

[0034] Figure 6 for Figure 5 The structural exploded diagram of the charging and discharging connection device shown;

[0035] Figure 7 for Figure 5 Schematic diagram of the cooling shell structure;

[0036] Figure 8 A schematic diagram of the structure of the charging and discharging connection device provided by an embodiment of the present invention installed on a mounting base;

[0037] Figure 9 A schematic structural diagram of another charging device provided in an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1. Outer shell; 101. First opening; 102. Second opening; 103. First entrance and exit; 104. Third opening; 105. First shell; 1051. First tube; 1052. First flange; 1053. Limiting structure; 106. Second shell; 1061. Second tube; 1062. Second flange; 2. Power terminal; 3. Wire; 301. Flow channel; 4. First blocking member; 5. Insulating heat-conducting member; 6. Cooling shell; 601. Heat-conducting column; 602. Main body; 603. Cover; 604. Communication port; 605. Second entrance and exit; 606. Ring groove; 7. Second blocking member; 8. Seal; 9. Cover; 10. Sealing ring; a. Connection position; 11. Metal sheet; 12. Mounting seat. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0041] During high-power charging, high currents flowing through charging and discharging connections, such as fast-charging connectors, charging guns, or charging sockets, generate significant heat, causing the temperature of the devices to rise sharply. Excessive heat and temperature not only accelerate the aging of materials in the charging and discharging connection devices, reducing their service life, but can also cause problems such as reduced insulation performance and poor contact, thereby affecting charging stability and safety.

[0042] In order to improve the problem of excessive temperature, the charge and discharge connection device in the related art adopts the method of increasing the metal heat conduction area or optimizing the contact structure to control the temperature rise, but the heat dissipation effect is poor.

[0043] In order to solve or improve the problem of poor heat dissipation effect of the charging and discharging connection device in the related art, an embodiment of the present invention provides a charging and discharging connection device, a charging device and an electric device.

[0044] The following combination Figures 1 to 9 , describing the charge and discharge connection device provided in an embodiment of the present invention.

[0045] Specifically, the charge-discharge connection device includes a housing 1 , a wire 3 , a power terminal 2 and an insulating phase change material.

[0046] The housing 1 has a cavity inside, and the housing 1 can be made of plastic.

[0047] The housing 1 is provided with a first opening 101 and a second opening 102, and both the first opening 101 and the second opening 102 are in communication with the chamber. For example, the first opening 101 and the second opening 102 are respectively provided on two opposite sides of the housing 1, and the first opening 101 and the second opening 102 are coaxially arranged. This facilitates the arrangement and connection of the wires 3 and the power terminals 2, making the internal structure of the charge-discharge connection device compact, making rational use of space, and facilitating manufacturing and practical application.

[0048] One end of the wire 3 is disposed within the chamber, and the other end of the wire 3 exits through the first opening 101. It will be appreciated that when the charge-discharge connection device is mounted on a power-consuming device, the wire 3 is electrically connected to the power battery. When the charge-discharge connection device is mounted on a charging device, the wire 3 is connected to the power output module of the charging device.

[0049] One end of the power terminal 2 is disposed within the cavity and electrically connected to the wire 3. The other end of the power terminal 2 can be electrically connected to the power-consuming device or the charging device through the second opening 102. For example, the power terminal 2 can pass through the second opening 102 and be electrically connected to the power-consuming device or the charging device. Alternatively, the power terminal 2 can remain within the second opening 102, i.e., the terminal of the power-consuming device or the charging device passes through the second opening 102 and is electrically connected to the power terminal 2.

[0050] It is understandable that when the charge-discharge connection device is installed on the power consumption device, the power terminal 2 is used to electrically connect to the charging device; when the charge-discharge connection device is installed on the charging device, the power terminal 2 is used to electrically connect to the power consumption device.

[0051] An insulating phase change material fills the chamber and is thermally conductively connected to at least one of power terminal 2 and wire 3. In other words, at least the portion of power terminal 2 or wire 3 within the chamber is encapsulated by the phase change material. Insulating phase change materials include, but are not limited to, organic phase change materials, inorganic phase change materials, and eutectic mixtures.

[0052] It can be understood that in this application, the thermal conductive connection means that the phase change material can be in contact with the power terminal 2 or the wire 3 for heat exchange, or the phase change material is not in contact with the power terminal 2 or the wire 3, but heat is exchanged through thermal radiation, or a combination of contact heat exchange and thermal radiation heat exchange.

[0053] Organic phase change materials include, but are not limited to, paraffin wax and fatty acids. Inorganic phase change materials include, but are not limited to, hydrated salts and molten salts. A eutectic mixture is a material made by mixing two or more different phase change materials in a certain proportion. For example, a eutectic phase change material can be obtained by mixing different types of fatty acids.

[0054] In this embodiment, an insulating phase change material can be filled in the cavity of the shell 1, that is, part of the power terminal 2 and part of the wire 3 and the connection position a between the two are all wrapped by insulating phase change material. When heat is generated during high-power charging, the phase change material can absorb the heat and undergo phase change, thereby effectively reducing the temperature of the charging and discharging connection device, thereby avoiding problems such as material aging, degradation of insulation performance, and poor contact caused by excessive temperature, and improving the stability and safety of the charging and discharging connection device.

[0055] Furthermore, the use of insulating phase-change materials ensures the insulation performance of the charging and discharging connection device, preventing potential hazards such as leakage or short circuits, and ensuring the safe operation of both the power-consuming and charging devices during the charging process. Furthermore, the phase-change material's heat absorption is completely passive, not relying on fans or liquid cooling systems, which can reduce system complexity and cost. Furthermore, the intermittent heat generation associated with high-power charging can be addressed through the phase-change material's repeated heat absorption-solidification cycle, resulting in high stability.

[0056] Alternatively, the phase change material may be a multi-phase transition temperature phase change material, such as a eutectic mixture. A multi-phase transition temperature phase change material is made by mixing two or more different phase change materials, has multiple phase transition temperatures, and can undergo different phase transition processes within different temperature ranges. In other words, a multi-phase transition temperature phase change material can absorb heat at different temperature stages.

[0057] For example, when the current load is low, the temperature rises to the first phase transition temperature, and one component in the eutectic mixture begins to undergo phase transition and absorb heat. When the current load increases and the temperature continues to rise to the second phase transition temperature, another component begins to undergo phase transition and absorb heat, and so on. In this way, segmented heat absorption is achieved, which can more flexibly respond to different levels of heat generation.

[0058] Such a setting can absorb heat at different temperature stages according to the different heat generated by the current load, thereby more effectively controlling the temperature of the charge and discharge connection device, adapting to changes in different current loads, and improving the performance and stability of the charge and discharge connection device under various working conditions.

[0059] Optionally, a thermally conductive filler, such as an insulating thermally conductive filler, may be added to the phase change material to increase the heat diffusion rate. Thermally conductive fillers include but are not limited to boron nitride, aluminum oxide, silicon carbide, and aluminum nitride.

[0060] In this embodiment, after thermally conductive fillers are added to the phase-change material, they are evenly distributed throughout the material, forming a structure similar to a "thermal bridge" or "thermal channel." When the phase-change material absorbs heat and undergoes a phase change, the heat can be quickly transferred to the surrounding environment or to other areas requiring heat dissipation through these channels formed by the thermally conductive fillers, thereby accelerating the diffusion of heat throughout the entire charge-discharge connection device.

[0061] It can be understood that the present application is particularly suitable for fast charging situations where the heat generation is large and the heat generation time is short.

[0062] refer to Figure 9 As shown, in some embodiments provided by the present invention, a first inlet and outlet 103 for the phase change material to pass through is provided on the housing 1. For example, the first inlet and outlet 103 can be provided on the top, bottom or side of the housing 1.

[0063] Furthermore, the charge-discharge connection device includes a first blocking member 4, which is connected to the housing 1, for example, by being threaded or snap-fitted to the housing 1. The first blocking member 4 is used to open and close the first entrance and exit 103. The number of first entrances and exits 103 can be two or more, and each first entrance and exit 103 is blocked by a corresponding first blocking member 4.

[0064] In this embodiment, the provision of the first inlet and outlet 103 facilitates the filling of the phase-change material into the chamber of the housing 1 during manufacturing. Furthermore, during use, if the phase-change material ages, experiences performance degradation, or other issues requiring replacement, the old phase-change material can be removed through the first inlet and outlet 103 and replaced with new phase-change material without disassembling the entire charge-discharge connection device, thereby improving maintenance convenience and operability.

[0065] Furthermore, the first sealing member 4 is connected to the housing 1, for example, by a threaded connection or a snap connection, effectively sealing the first inlet and outlet 103. This ensures that the phase change material in the chamber is isolated from the external environment, preventing impurities such as dust and moisture from entering the chamber and affecting the performance of the phase change material and the normal operation of the charge-discharge connection device.

[0066] Of course, in other embodiments, the housing 1 may not be provided with the first entrance 103. For example, the housing 1 may be provided as a split structure, and the various parts of the housing 1 may be assembled and then welded. Before welding and sealing, the phase change material may be placed in the housing chamber and then welded and sealed.

[0067] Alternatively, the shell 1 can also be processed by three-dimensional printing, first printing the main body of the shell with the closed chamber, then injecting the phase change material into the main body, and finally printing the complete shell.

[0068] In some embodiments provided by the present invention, the power terminal 2 is directly connected to the wire 3, for example, the connecting ends of the power terminal 2 and the wire 3 are overlapped and then welded, crimped, riveted or screwed.

[0069] Of course, the power terminal 2 can also be connected to the wire 3 indirectly, for example, Figure 9 As shown, the charge-discharge connection device further includes a metal sheet 11. One end of the metal sheet 11 is stacked and connected to the power terminal 2, for example, by welding, crimping, screwing, or riveting. The other end of the metal sheet 11 is stacked and connected to the connection end of the wire 3, for example, by welding, crimping, screwing, or riveting.

[0070] In this embodiment, the metal sheet 11 can serve as a transition and buffer, helping to optimize the electrical connection between the power terminal 2 and the wire 3. For example, during current transmission, the metal sheet 11 can evenly distribute the current, reduce current concentration, lower resistance and heat generation, and improve charging efficiency and safety.

[0071] In addition, by using the metal sheet 11 as an intermediate connecting member, it is easier to achieve connection between power terminals 2 and wires 3 of different specifications and types.

[0072] refer to Figure 1-Figure 4 As shown, in some embodiments provided herein, the housing 1 further comprises a third opening 104, and the connection point a between the power terminal 2 and the wire 3 is arranged opposite the third opening 104. The charge-discharge connection device further comprises an insulating heat-conducting member 5 and a hollow cooling shell 6. Optionally, the cooling shell 6 is configured as a heat-conducting structure, for example, a metal shell, a ceramic shell, or a glass shell. The insulating heat-conducting member 5 may be made of ceramic, thermally conductive silicone, mica sheet, or quartz glass.

[0073] The insulating heat-conducting member 5 is disposed at the connection position a and opposite the third opening 104. A phase change material is disposed within the cooling shell 6. It is understood that the phase change material disposed within the cooling shell 6 can be an insulating phase change material as described above, or a non-insulating phase change material. Non-insulating phase change materials include, but are not limited to, liquid metals, and liquid metals include, but are not limited to, gallium-based alloys and bismuth-based alloys.

[0074] Furthermore, one end of the cooling shell 6 is disposed outside the cavity, and the other end of the cooling shell 6 extends into the cavity through the third opening 104 and abuts against the insulating heat-conducting member 5. The cooling shell 6 can be connected to the outer shell 1.

[0075] The contact resistance at the connection position a is usually greater than the resistance of the wire 3 or the power terminal 2 itself, that is, the connection position a is more likely to generate heat.

[0076] In this embodiment, the cooling shell 6 is configured as a heat-conducting structure and contains a phase-change material. This effectively absorbs heat generated at the connection point a between the power terminal 2 and the wire 3. When the temperature at connection point a rises, the phase-change material undergoes a phase change to absorb heat and store the heat, thereby lowering the temperature at connection point a. This prevents performance degradation and safety hazards caused by overheating, and improves the heat dissipation efficiency and stability of the charge-discharge connection device.

[0077] In addition, one end of the cooling shell 6 is outside the chamber (low temperature zone) and the other end is inside the chamber (high temperature zone). This structure naturally forms a temperature gradient, driving heat to transfer from the high-temperature connection position a to the low-temperature external environment, so that the external environment can continue to take away heat and maintain the sustainability of heat dissipation.

[0078] That is, heat at connection point a can be transferred outside the cavity of housing 1 through the phase change material and cooling shell 6, preventing heat accumulation within the cavity. Furthermore, the phase change material inside cooling shell 6 not only absorbs a large amount of heat (latent heat) through the phase change process, but also acts as a heat transfer medium to spread heat over a larger area, improving heat dissipation efficiency. That is, with one end of cooling shell 6 exposed outside the cavity, the heat absorbed by the phase change material can be more effectively dissipated to the external environment.

[0079] The insulating thermally conductive member 5 isolates the connection point a between the power terminal 2 and the wire 3 from the cooling shell 6 and other external components, providing excellent insulation and preventing safety hazards such as electrical short circuits and leakage. Furthermore, the insulating thermally conductive member 5 exhibits excellent thermal conductivity, rapidly transferring heat from the connection point a to the phase change material within the cooling shell 6, achieving efficient heat dissipation while ensuring electrical safety.

[0080] At the same time, the provision of the third opening 104 can facilitate the installation and positioning of the cooling shell 6, making the structure of the entire charging and discharging connection device more reasonable and compact, saving space.

[0081] In this embodiment, both the insulating phase-change material within the outer shell 1 and the phase-change material within the cooling shell 6 absorb heat, creating a dual heat dissipation protection mechanism. Specifically, the phase-change material within the chamber absorbs heat from the power terminals 2, wires 3, and near connection location a, while the phase-change material within the cooling shell 6 further transfers heat to the outside, forming a two-stage heat dissipation mechanism suitable for high-power, high-heat charging scenarios.

[0082] Optionally, the phase change material in the cooling shell 6 may also be a multi-phase temperature phase change material, or a thermal conductive filler may be added to the phase change material. The specific effects are as described above regarding the multi-phase temperature phase change material and the thermal conductive filler, which will not be repeated here.

[0083] Optionally, the third opening 104 is arranged opposite to the metal sheet 11 , and the insulating heat-conducting member 5 is arranged on the metal sheet 11 .

[0084] In this embodiment, metal sheet 11, serving as the connecting medium between power terminal 2 and wire 3, is a key node in the current path and a region of concentrated resistance. Therefore, metal sheet 11 itself is the primary heat source. Positioning third opening 104 opposite metal sheet 11 and placing insulating thermal conductor 5 in direct contact with metal sheet 11 allows for the most direct capture and dissipation of heat, preventing it from dissipating to the surrounding area.

[0085] Furthermore, heat is transferred directly from the metal sheet 11 through the insulating heat conductor 5 to the cooling shell 6, and then to the external environment, using the shortest path and minimizing thermal resistance. The insulating heat conductor 5 not only efficiently conducts heat but also prevents electrical short circuits between the metal sheet 11 and the cooling shell 6, ensuring safety in high-voltage, high-current environments.

[0086] In some embodiments provided by the present invention, a heat conducting column 601 is provided on the inner wall of the cooling shell 6 near the connection position a. Figure 3 As shown, assuming the charge-discharge connection device is positioned as shown, the inner bottom wall of the cooling shell 6 is provided with a heat-conducting column 601. The heat-conducting column 601 can be, but is not limited to, a copper column or a graphite column. Optionally, there can be multiple heat-conducting columns 601. The heat-conducting columns 601 can be integrally formed with the cooling shell 6 or welded to it.

[0087] In this embodiment, thermally conductive pillars 601 extend from the inner wall of the cooling shell 6 into the interior of the phase-change material, forming a "thermal bridge" that conducts heat from connection point a directly into the core of the phase-change material, avoiding reliance on the slow thermal diffusion of the phase-change material itself. Furthermore, thermally conductive pillars 601 significantly increase the contact area between the phase-change material and the inner wall of the cooling shell 6, accelerating the phase-change material's heat absorption rate.

[0088] This arrangement, by adjusting the heat conduction path in the cooling shell 6, can solve the problem of delayed heat dissipation caused by the poor thermal conductivity of the phase change material. For example, the solution of this embodiment is particularly suitable for the stringent requirements of transient temperature rise in high-power fast charging scenarios, while retaining the reliability advantage of passive heat dissipation of the phase change material.

[0089] Optionally, the cooling shell 6 includes a main body 602 and a cover 603. The main body 602 is open at one end. The cover 603 seals the open end of the main body 602 and, together with the main body 602, forms a storage space for accommodating the phase change material. For example, the cover 603 is disposed at an end of the main body 602 away from the connection position a. The cover 603 can be welded or bonded to the main body 602.

[0090] In this embodiment, the split design of the main body 602 and the cover 603 allows for the use of different manufacturing processes (eg, die-casting of the main body 602 and machining of the cover 603 ), thereby reducing the overall manufacturing difficulty.

[0091] Of course, the cooling shell 6 is not limited to the above-mentioned cooling form. Figure 5-Figure 7 As shown, in other embodiments provided by the present invention, the housing 1 is further provided with a third opening 104. Optionally, the connection position a between the power terminal 2 and the wire 3 is arranged opposite to the third opening 104. For example, the third opening 104 can be arranged opposite to the metal sheet 11.

[0092] The charge-discharge connection device also includes a hollow cooling shell 6. For example, the cooling shell 6 can be a metal shell, a ceramic shell, or a glass shell. The cooling shell 6 is filled with an insulating phase-change material. The insulating phase-change material has been discussed above and will not be further described here. The cooling shell 6 has a communication port 604 that communicates with the interior of the cooling shell 6. The cooling shell 6 can be connected to the outer shell 1, with at least a portion of the cooling shell 6 located outside the chamber. The communication port 604 communicates with the third opening 104.

[0093] In this embodiment, both the external cooling shell 6 and the cavity inside the outer shell 1 can accommodate phase change materials, that is, the cooling shell 6 and the outer shell 1 form a dual storage system, which can increase the filling amount of phase change material, thereby significantly extending the effective heat dissipation time under high load, which is especially suitable for high-power fast charging scenarios.

[0094] Cooling shell 6 is located outside the cavity and communicates with the cavity of housing 1 through communication port 604, allowing heat to be better transferred from housing 1 to cooling shell 6. Taking advantage of the low temperature of the external environment, heat absorbed by the phase change material is directly transferred to the outside of housing 1, preventing heat accumulation in the cavity, reducing the overall temperature, and enhancing the heat dissipation capacity of the connection device. This approach not only utilizes the heat absorption properties of the phase change material, but also utilizes the external environment to assist in heat dissipation.

[0095] In addition, the cooling shell 6 is installed outside the chamber as an independent module, which is convenient for production, assembly and maintenance, and the size of the cooling shell 6 and the amount of phase change material can be flexibly adjusted according to different power requirements.

[0096] Optionally, similar to the previous embodiment, the inner wall of the cooling shell 6 in this embodiment can also be provided with a heat conducting column. For example, the heat conducting column can be provided on the inner side wall of the cooling shell 6, or on the inner wall of the cooling shell 6 opposite to the communication port 604.

[0097] It can be understood that the above-mentioned two forms of cooling shells 6 do not have to be set in one form or the other. For example, in some embodiments not shown, at least two third openings 104 are provided on the outer shell 1, wherein some of the third openings 104 are installed with cooling shells 6 with through openings, and another part of the third openings 104 are installed with cooling shells 6 with insulating heat conductive parts 5.

[0098] In this embodiment, the cooling shell 6, equipped with an insulating heat conductor 5, directly contacts core heat-generating areas such as the connection point a or the metal sheet 11, rapidly conducting heat away via the shortest path possible, thus addressing transient temperature rise issues. Coolant provided with a communication port 604 absorbs significant amounts of heat through the phase change process of the phase change material, effectively dissipating heat for extended periods of time, even in high-energy environments.

[0099] refer to Figure 4 and Figure 6 As shown, in some embodiments provided by the present invention, the portion of the cooling shell 6 located outside the chamber is provided with a second inlet and outlet 605. The second inlet and outlet 605 is used for allowing the phase change material to pass through.

[0100] Furthermore, the charge-discharge connection device further includes a second blocking member 7, which is connected to the cooling shell 6 and is used to open and close the second inlet and outlet 605. For example, the second blocking member 7 can be connected to the cooling shell 6 by screwing or clamping.

[0101] In this embodiment, the second inlet and outlet 605 is provided to facilitate the phase change material to enter the cooling shell 6. During the production and assembly process, the phase change material can be quickly filled into the cooling shell 6 through the inlet and outlet, thereby improving production efficiency.

[0102] Over time, the performance of the phase-change material may deteriorate or require replenishment or replacement due to leakage. Second access 605 provides convenient access for replacing the phase-change material, eliminating the need to disassemble the entire cooling shell 6 or the charging and discharging connection device, reducing maintenance effort and costs. Maintenance personnel simply need to open the second sealing member 7 to extract the phase-change material and refill it, making the process simple and convenient.

[0103] Optionally, the second blocking member 7 may be configured as a temperature sensor. Thus, the second blocking member 7 can not only seal the cooling shell 6 but also obtain the temperature value of the phase change material in the cooling shell 6 in a timely manner.

[0104] Optionally, there are two second inlets and outlets 605, each of which is provided with a corresponding second blocking member 7. In this embodiment, during the filling process, one inlet and outlet is used to inject the phase change material, and the other inlet and outlet is used for exhaust, effectively reducing air entrapment or residual bubbles inside the cooling shell 6 and ensuring that the phase change material fully fills the entire cavity.

[0105] In some embodiments provided by the present invention, an annular groove 606 is provided on the cooling shell 6, and the annular groove 606 is arranged circumferentially around the third opening 104, and the annular groove 606 passes through the end face of the cooling shell 6 close to the outer shell 1, at least part of the annular groove 606 is arranged in the third opening 104, and a seal 8 is provided between the annular groove 606 and the third opening 104.

[0106] In this embodiment, the annular groove 606 is arranged around the third opening 104, and the seal 8 is installed in the annular groove 606 to form a surrounding sealing structure, which effectively prevents the insulating phase change material from leaking from the third opening 104. At the same time, it can also prevent external dust, water vapor and other impurities from entering the interior of the cooling shell 6, affecting the performance of the phase change material and the normal operation of the charging and discharging connection device.

[0107] In addition, the design of the annular groove 606 has certain versatility and flexibility. Even if the third opening 104 and the cooling shell 6 have dimensional errors, the seal 8 can be squeezed and deformed to a certain extent in the annular groove 606 according to actual conditions, and still ensure good sealing performance, thereby improving the adaptability of the cooling shell 6 to connecting components of different specifications.

[0108] In some embodiments of the present invention, the cooling shell 6 is detachably connected to the outer shell 1. In this embodiment, if the cooling shell 6 becomes damaged, aged, or the internal phase change material needs to be replaced, the cooling shell 6 can be directly removed from the outer shell 1 for repair or treatment, without the need for large-scale disassembly of the entire charging and discharging connection device, significantly reducing repair time and cost.

[0109] Furthermore, during production, the cooling shell 6 and outer shell 1 can be processed and assembled separately before being reassembled, which facilitates specialized and scaled production, improving production efficiency and product quality. During transportation and storage, the cooling shell 6 and outer shell 1 can be separated and packaged and stored separately, reducing overall volume and weight, lowering transportation costs and storage space requirements.

[0110] Optionally, the cooling shell 6 is screwed to the outer shell 1. For example, a connecting ear is provided on the side wall of the cooling shell 6, and a through hole is provided on the connecting ear for a threaded fastener to pass through. The threaded fastener passes through the connecting ear and is threadedly connected to the outer shell 1. Of course, in other embodiments, the cooling shell 6 can also be snap-fitted to the outer shell 1.

[0111] In some embodiments provided herein, the housing 1 includes a first shell 105 and a second shell 106. The first shell 105 and the second shell 106 are detachably connected and together form a chamber. For example, the first shell 105 and the second shell 106 are screwed or snapped together. The first shell 105 has a first opening 101 for the wire 3 to pass through, and the second shell 106 has a second opening 102 for connecting the power terminal 2 to a charging device or a power-consuming device.

[0112] In this embodiment, the first and second housings 105, 106 can be independently manufactured, avoiding the challenges of integrally molding a complex cavity. Furthermore, a sealing ring 10 can be provided at the connection surface between the first and second housings 105, 106. Combined with the pre-tightening force of the screw or clamp connection, this creates a double sealing barrier, effectively preventing dust and moisture from intruding into the cavity and protecting the internal electrical components.

[0113] Specifically, there are two first openings 101 and two second openings 102. Each first opening 101 is provided with a corresponding wire 3, and each second opening 102 is provided with a corresponding power terminal 2, and the wire 3 is connected to the corresponding power terminal 2. In this embodiment, the positive and negative power terminals 2 are separately provided in different openings, which can effectively increase the physical distance between the positive and negative electrodes and reduce the risk of short circuits caused by accidental contact or mistaken contact with conductive objects.

[0114] Further, refer to Figure 4 As shown, the connection points a between the two power terminals 2 and the wires 3 are both positioned opposite the insulating heat-conducting member 5. The cooling shell 6 abuts against the insulating heat-conducting member 5, dissipating heat from both connection points a simultaneously. This design allows for more efficient use of space, integrating the heat dissipation function within a limited space and making the device layout more compact.

[0115] In some embodiments provided by the present invention, the housing 1 includes a first tube 1051 , the tube mouth of the first tube 1051 forms a first opening 101 , and the wire 3 is passed through the first tube 1051 . The charge and discharge connection device further includes a cover 9 and a sealing ring 10 .

[0116] The cover 9 is sleeved on the wire 3 and is sleeved on the outside of the tube mouth of the first tube body 1051. The sealing ring 10 is sealed between the wire 3 and the first tube body 1051. The cover 9 limits the sealing ring 10 along the axial direction of the wire 3.

[0117] In this embodiment, the sealing ring 10 is sealed between the wire 3 and the first tube 1051, which can effectively prevent external dust, moisture, impurities, etc. from entering the interior of the housing 1, preventing these substances from damaging the internal power terminal 2, connection position a and other electrical components.

[0118] The cover 9 is sealed at the first opening 101. On the one hand, it can prevent external dust, moisture, impurities, etc. from entering the interior of the housing 1, further enhancing the sealing effect. On the other hand, the cover 9 limits the sealing ring 10 along the axial direction of the wire 3, ensuring that the sealing ring 10 will not shift or fall off during use, further enhancing the reliability of the seal, so that the charging and discharging connection device can adapt to relatively harsh environments, such as humid and dusty environments.

[0119] Optionally, a limiting structure 1053 is provided on the inner wall of the first tube 1051, and the limiting structure 1053 cooperates with the end of the sealing ring 10 away from the cover 9 to limit the sealing ring 10 in the axial direction of the wire 3. The limiting structure 1053 can be set as a limiting protrusion.

[0120] In this embodiment, the limiting structure 1053 and the cover 9 axially limit the sealing ring 10 from two directions, ensuring that the sealing ring 10 remains stable and is not susceptible to movement or deformation even when subjected to external forces or equipment vibration. This two-way limiting method greatly improves the stability of the seal. Even in complex operating environments, such as those subject to vibration or impact, the sealing performance of the sealing ring 10 is not affected, effectively preventing foreign matter from entering the equipment.

[0121] Optionally, the cover 9 is snap-fitted to the first tube 1051. In this embodiment, this snap-fitting method eliminates the need for additional tools, such as screws or nuts, for fastening. Installation is accomplished by simply aligning the cover 9 with the corresponding position of the first tube 1051 and gently pressing or pushing it in. This significantly improves installation efficiency, saving significant time and labor costs, particularly during large-scale production or rapid on-site assembly.

[0122] Optionally, the first housing 105 includes a first tube 1051 and a first flange 1052. The first flange 1052 is disposed at an end of the first tube 1051 that is close to the second housing 106. The wire 3 is passed through the first tube 1051. The cover 9 is connected to an end of the first tube 1051 that is away from the first flange 1052. It is understood that there are two first tubes 1051, each of which is passed through a corresponding wire 3, and each of the first tubes 1051 is connected to the first flange 1052.

[0123] In this embodiment, the first flange 1052 provides a unified positioning reference for the installation of the first tubes 1051. During installation, simply aligning and securing the first flange 1052 to the second housing 106 ensures the accurate relative positioning of the two first tubes 1051, facilitating the subsequent routing of the wires 3 and the installation of other components, thereby improving installation efficiency and accuracy. The wires 3 are routed through their respective first tubes 1051, maintaining spacing between the wires 3 to avoid interference or electrical discharge.

[0124] Accordingly, the second housing 106 includes a second tube 1061 and a second flange 1062. The second flange 1062 is disposed at one end of the second tube 1061 proximal to the first housing 105. The second flange 1062 and the first flange 1052 are sealed together, for example, by being snap-fitted or screwed together. The power terminal 2 is disposed within the second tube 1061 and is sealed together with the second tube 1061 via a seal 8. It is understood that there are two second tubes 1061, each having a corresponding power terminal 2 therethrough, and each second tube 1061 is connected to the second flange 1062.

[0125] In this embodiment, the second flange 1062 and the first flange 1052 are detachably connected by a snap-fit ​​or screw-fit method, facilitating assembly and maintenance of the charge-discharge connection device. The power terminals 2 are inserted into the corresponding second tubes 1061, maintaining spacing between the power terminals 2 to avoid interference or discharge.

[0126] In some embodiments provided by the present invention, the wire 3 has a flow channel 301 extending in the axial direction inside, and the flow channel 301 is used to fill the phase change material.

[0127] In this embodiment, conductor 3 generates heat when transmitting current. The phase-change material within flow channel 301 effectively absorbs this heat, reducing the temperature of conductor 3 and preventing overheating that could affect performance and lifespan. Providing flow channel 301 within conductor 3, filled with phase-change material, eliminates the need for additional space for heat dissipation devices, improving space utilization.

[0128] In some embodiments provided by the present invention, the wire 3 has a flow channel 301 extending in the axial direction inside. The flow channel 301 is communicated with the cavity and is used to be filled with an insulating phase change material.

[0129] In addition to the advantages of the previous embodiment regarding the phase change material disposed within the conductor 3, this embodiment also offers the following advantages: When the conductor 3 generates heat due to current transmission, the phase change material within the flow channel 301 absorbs the heat and undergoes a phase change. This heat is then transferred through the connection to the chamber of the housing 1. The chamber typically has a large space and surface area, which facilitates further heat dissipation and allows for rapid heat transfer to the external environment, thereby effectively reducing the temperature of the conductor 3 and the entire device, preventing overheating from affecting device performance and lifespan.

[0130] In some embodiments provided by the present invention, the charge and discharge connection device further includes a mounting base 12 , and the housing 1 is connected to the mounting base 12 , for example, the two are snap-connected or screw-connected.

[0131] In this embodiment, the provision of mounting base 12 facilitates the convenient installation of the charge-discharge connection device on the target device or structure. By connecting mounting base 12 to the external device, such as with bolts or snaps, the charge-discharge connection device can be securely fixed in place, preventing it from shifting or loosening during operation and improving the stability of the device's operation. Furthermore, mounting base 12 provides additional support for housing 1, enhancing the structural strength of the entire charge-discharge connection device.

[0132] It should be noted that the charging and discharging connection device described in this application can be a charging socket and a fast charging connector of an electrical device. Alternatively, the charging and discharging connection device can also be a charging gun of a charging device.

[0133] A charging device is also provided in an embodiment of the present invention.

[0134] Specifically, the charging device includes the charging and discharging connection device described above.

[0135] It should be noted that the charging device includes the charging and discharging connection device, and also includes all the above advantages of the charging and discharging connection device.

[0136] It is understandable that charging devices include but are not limited to charging piles and charging vehicles.

[0137] An embodiment of the present invention further provides an electrical device.

[0138] Specifically, the electrical device includes the charging and discharging connection device as described above.

[0139] It should be noted that the electrical device includes the charging and discharging connection device, and also includes all the above advantages of the charging and discharging connection device.

[0140] It is understood that electrical devices include but are not limited to vehicles and energy storage systems.

[0141] Vehicles include but are not limited to vehicles, aircraft and ships.

[0142] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A charging and discharging connection device, characterized in that: include: A housing (1), wherein the housing (1) has a chamber therein, and the housing (1) is provided with a first opening (101) and a second opening (102), wherein both the first opening (101) and the second opening (102) are in communication with the chamber; A wire (3), one end of the wire (3) is arranged in the chamber, and the other end of the wire (3) passes through the first opening (101); a power terminal (2), one end of the power terminal (2) being arranged in the chamber and connected to the wire (3), and the other end of the power terminal (2) being electrically connected to an electric device or a charging device through the second opening (102); An insulating phase change material is filled in the cavity and is thermally conductively connected to at least one of the wire (3) and the power terminal (2).

2. The charge and discharge connection device according to claim 1, characterized in that: The housing (1) is provided with a first inlet and outlet (103) for allowing the phase change material to pass through, and the charge and discharge connection device further comprises a first blocking member (4), the first blocking member (4) being connected to the housing (1) and being used to open and close the first inlet and outlet (103).

3. The charge-discharge connection device according to claim 1, characterized in that: The housing (1) is further provided with a third opening (104); a connection position (a) between the power terminal (2) and the wire (3) is arranged opposite to the third opening (104); and the charge-discharge connection device further comprises an insulating heat-conducting member (5) and a hollow cooling shell (6); The insulating heat-conducting member (5) is arranged at the connection position (a) and is opposite to the third opening (104); a phase change material is provided inside the cooling shell (6); one end of the cooling shell (6) is arranged outside the cavity, and the other end passes through the third opening (104) and abuts against the insulating heat-conducting member (5).

4. The charge-discharge connection device according to claim 3, characterized in that: A heat-conducting column (601) is provided on the inner wall of the cooling shell (6) close to the connection position (a).

5. The charge and discharge connection device according to claim 1, characterized in that: The housing (1) is further provided with a third opening (104), and the charge-discharge connection device further comprises a hollow cooling shell (6); The cooling shell (6) is used to be filled with an insulating phase change material, and the cooling shell (6) is provided with a communication port (604) that is connected to the interior of the cooling shell (6). The cooling shell (6) is connected to the outer shell (1) and is at least partially arranged outside the cavity, and the communication port (604) is connected to the third opening (104).

6. The charge-discharge connection device according to any one of claims 3 to 5, characterized in that: The portion of the cooling shell (6) located outside the chamber is provided with a second entrance and exit (605), the second entrance and exit (605) being used for allowing the phase change material to pass through, the charging and discharging connection device further comprising a second blocking member (7), the second blocking member (7) being connected to the cooling shell (6) and being used for opening and closing the second entrance and exit (605); And / or, an annular groove (606) is provided on the cooling shell (6), the annular groove (606) is arranged around the circumference of the third opening (104), and the annular groove (606) passes through the end surface of the cooling shell (6) close to the outer shell (1), at least a part of the annular groove (606) is provided in the third opening (104), and a sealing member (8) is provided between the annular groove (606) and the third opening (104); And / or, the cooling shell (6) is detachably connected to the outer shell (1).

7. The charge-discharge connection device according to any one of claims 1 to 5, characterized in that: The housing (1) comprises a first tube body (1051), the tube mouth of the first tube body (1051) forms the first opening (101), and the charge-discharge connection device further comprises a cover (9) and a sealing ring (10); The cover (9) is sleeved on the wire (3) and sleeved on the outside of the tube mouth of the first tube body (1051); the sealing ring (10) is sealingly arranged between the wire (3) and the first tube body (1051); and the cover (9) limits the sealing ring (10) along the axial direction of the wire (3).

8. The charge-discharge connection device according to any one of claims 1 to 5, characterized in that: The wire (3) has a flow channel (301) extending in the axial direction inside, and the flow channel (301) is used to fill the phase change material; And / or, the wire (3) has a flow channel (301) extending in the axial direction inside, the flow channel (301) is communicated with the chamber and is used to fill with insulating phase change material.

9. A charging device, characterized in that: It comprises the charging and discharging connection device according to any one of claims 1 to 8.

10. An electrical device, characterized in that: It comprises the charging and discharging connection device according to any one of claims 1 to 8.

Images