charging equipment

Abstract

This invention discloses a charging device, including a housing body, an end cap disposed at one end of the housing body, an electrical component located within the housing body, and a pin disposed on the end cap and electrically connected to the electrical component. The end cap includes a heat-conducting shell portion, a heat-spreading plate, and a heat-dissipating shell portion. The heat-spreading plate is located between the heat-conducting shell portion and the heat-dissipating shell portion, and is thermally conductively connected to both the heat-conducting shell portion and the heat-dissipating shell portion. The heat-conducting shell portion is disposed on the side of the heat-spreading plate closer to the electrical component. The heat-dissipating shell portion is disposed on the side of the heat-spreading plate away from the electrical component, and at least partially exposed to the outside. Heat is rapidly diffused on the heat-spreading plate and then conducted to the heat-dissipating shell portion, which can increase the effective cross-sectional area of ​​the heat flow path and reduce the diffusion thermal resistance of the heat flow path, thereby improving heat dissipation efficiency and effectively reducing the temperature of the charging device during use. This avoids the normal operation and service life of the electrical component due to excessively high temperature of the charging device, and also reduces the risk of burns during use.

Description

Technical Field

[0001] This invention relates to the field of electronic product technology, and more particularly to a charging device. Background Technology

[0002] The electrical components inside a charger generate a significant amount of heat during operation, leading to a high overall charger temperature. If this heat cannot be dissipated, it can affect the normal operation and lifespan of these components. Ordinary charger casings have poor heat dissipation, causing the entire casing to overheat. This not only shortens the charger's lifespan but also poses a risk of burns to the user's hands when touching the casing surface after removing the charger. Summary of the Invention

[0003] In view of this, the present invention provides a charging device to solve the above problems.

[0004] This application provides a charging device, including a housing body, an end cap disposed at one end of the housing body, an electrical component located inside the housing body, and a plug disposed on the end cap and electrically connected to the electrical component. The end cap includes a heat-conducting shell portion, a heat-spreading plate, and a heat-dissipating shell portion. The heat-spreading plate is located between the heat-conducting shell portion and the heat-dissipating shell portion, and is thermally conductively connected to both the heat-conducting shell portion and the heat-dissipating shell portion. The heat-conducting shell portion is disposed closer to the electrical component than the heat-dissipating shell portion and is thermally conductively connected to the electrical component. The heat-dissipating shell portion is at least partially exposed outside the housing body to contact the outside air.

[0005] The charging device provided by this invention includes a heat-conducting shell and a heat-dissipating shell, with a heat-spreading plate disposed between them. The heat-spreading plate has excellent thermal conductivity, allowing heat generated during the operation of electrical components to be conducted through the heat-conducting shell to the heat-spreading plate. After reaching the heat-spreading plate, the heat rapidly diffuses and then flows to the heat-dissipating shell, which contacts the external air, thus dissipating the heat into the surrounding air. This rapid diffusion of heat on the heat-spreading plate before conduction to the heat-dissipating shell increases the effective cross-sectional area of ​​the heat flow path and reduces the diffusion thermal resistance, allowing heat to flow more smoothly from the heat-conducting shell to the heat-dissipating shell. This improves heat dissipation efficiency and effectively reduces the temperature of the charging device during use, preventing overheating from affecting the normal operation and lifespan of electrical components. Furthermore, since the heat-dissipating shell and the plug are located on the same side of the shell body, with the plug inserted into the socket and the heat-dissipating shell facing the socket, the user is less likely to come into contact with the heat-dissipating shell, reducing the risk of burns during use. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of a charging device provided in an embodiment of the present invention;

[0007] Figure 2 for Figure 1 An exploded view of the charging device shown;

[0008] Figure 3 for Figure 1 An exploded view of the end cap shown;

[0009] Figure 4 for Figure 3 A schematic diagram of the structure of the heat dissipation shell described above;

[0010] Figure 5 for Figure 3 A cross-sectional view of the heat sink housing and heat spreader plate in the assembled state shown in the figure.

[0011] Figure 6 for Figure 2 The diagram shows an exploded view of the shell body and the heat-conducting shell.

[0012] In the diagram: 100, charging device; 10, housing; 12, electrical component; 14, heat-conducting shell; 16, heat spreader; 18, heat dissipation shell; 20, pin; 22, main body of the shell; 24, end cap; 26, storage slot; 28, clearance space; 30, first heat spreader; 32, second heat spreader; 34, first heat spreader; 36, second heat spreader; 38, accommodating space; 40, protrusion; 42, recess; 44, heat dissipation hole; 46, heat dissipation fin; 48, inner shell; 50, outer shell; 52, heat spreader; 54, storage part; 56, clearance slot; 58, bending part; 60, heat-conducting bracket; 62, heat-conducting part; 64, fixing part. Detailed Implementation

[0013] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0014] It should be noted that all directional indications (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0015] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0016] Please see Figures 1 to 6An embodiment of the present invention provides a charging device 100, including a housing 10, an electrical component 12 located within the housing 10, and a plug 20 mounted on the housing 10 and electrically connected to the electrical component 12. The plug 20 is used to insert into a socket to form an electrical connection with an external power source. The housing 10 includes a housing body 22 and an end cap 24 disposed at one end of the housing body 22. The electrical component 12 is located within the housing body 22, and the plug 20 is mounted on the end cap 24 and electrically connected to the electrical component 12. Specifically, the housing body 22 has a storage cavity, one end of which forms an opening. The electrical component 12 is inserted into the storage cavity through the opening, and the end cap 24 is disposed at the opening of the housing body 22.

[0017] The shell body 22 includes a heat-conducting shell portion 14, a heat-spreading plate 16, and a heat-dissipating shell portion 18. The heat-spreading plate 16 is located between the heat-conducting shell portion 14 and the heat-dissipating shell portion 18, and is thermally connected to both the heat-conducting shell portion 14 and the heat-dissipating shell portion 18. It should be noted that a thermally conductive connection means that after connection, heat can flow from the one with a higher temperature to the one with a lower temperature. The two parts connected by thermal conduction can be set to a direct connection or an indirect connection, such as a thermally conductive medium placed between them. The thermally conductive medium can be, for example, thermally conductive adhesive, thermally conductive plastic, graphite, thermally conductive metal, etc.

[0018] A heat-conducting shell 14 is disposed on the side of the heat spreader 16 near the electrical component 12; a heat-dissipating shell 18 is disposed on the side of the heat spreader 16 away from the electrical component 12; the heat-dissipating shell 18 is at least partially exposed to the outside. Understandably, the heat-conducting shell 14 is closer to the electrical component 12 than the heat-dissipating shell 18, meaning the heat-conducting shell 14 is closer to the electrical component 12 than the heat-dissipating shell 18. The heat-conducting shell 14 is located between the heat-dissipating shell 18 and the electrical component 12, and is thermally conductively connected to the electrical component 12. Heat generated by the electrical component 12 during operation can be conducted through the heat-conducting shell 14 to the heat spreader 16, where it is rapidly diffused before being conducted to the heat-dissipating shell 18. The heat-dissipating shell 18 is at least partially exposed outside the shell body 22, thereby contacting the outside air for heat exchange, dissipating heat into the surrounding air, and reducing the temperature of the charging device 100 during use.

[0019] The heat generated during the operation of electrical component 12 is conducted to heat spreader 16 through heat-conducting shell 14. The heat then spreads rapidly on heat spreader 16 and is conducted to heat dissipation shell 18. The heat spreader 16 increases the effective cross-sectional area of ​​the heat flow path and reduces the thermal resistance of the heat flow path, allowing heat to be conducted more smoothly and quickly from heat-conducting shell 14 to heat dissipation shell 18, thereby improving heat dissipation efficiency and effectively reducing the temperature of charging device 100 during use. This prevents the normal operation and service life of electrical component 12 from being affected by excessive temperature. Furthermore, since end cap 24 and pin 20 are located on the same side of shell body 22, when pin 20 is inserted into socket, the heat dissipation shell 18 of end cap 24 faces the socket, making it less likely for the user to come into contact with the heat dissipation shell 18, thus reducing the risk of burns during use.

[0020] For example, the vapor chamber 16 is a vacuum chamber vapor chamber, i.e., a VC (Vapor Chamber) vapor chamber. A vacuum chamber is formed inside the vapor chamber, and the inner wall of the vacuum chamber is provided with capillary structures and filled with a small amount of volatile liquid, such as pure water. Heat is rapidly transferred through the evaporation and condensation of the liquid. After absorbing heat on the side of the vacuum chamber near the heat-conducting shell 14, the liquid rapidly evaporates to form vapor. The vapor diffuses towards the area with lower pressure within the vacuum chamber, i.e., the side near the heat dissipation shell 18. Upon reaching the side of the vacuum chamber near the heat dissipation shell 18, the vapor releases heat and condenses back into liquid, thereby transferring heat from the side of the vapor chamber near the heat-conducting shell 14 to the side near the heat dissipation shell 18. The condensed liquid flows back to the side of the vacuum chamber near the heat-conducting shell 14 through the capillary action of the internal capillary structures, completing one cycle. The thermal conductivity of the vacuum chamber vapor chamber is in the range of 500~10000 W / (m·K).

[0021] The heat dissipation shell 18 is made of superconducting plastic, which is a type of plastic with a high thermal conductivity. Essentially, it is a polymer-based thermally conductive composite material. By filling the plastic with a large amount of thermally conductive additives such as boron nitride, aluminum nitride, alumina, and carbon, a through-type thermally conductive network is constructed, achieving a leap in thermal conductivity and making its thermal conductivity far greater than that of ordinary plastic parts such as PC parts. The thermal conductivity of superconducting plastic parts is 0.6~1 W / (m·K), while that of ordinary plastic parts is 0.15~0.25 W / (m·K). Using superconducting plastic to make the heat dissipation shell 18 allows it to have a high thermal conductivity to meet heat dissipation requirements while also providing insulation to prevent leakage and ensure the electrical safety of the charging device 100.

[0022] The heat-conducting shell 14 can be a metal part or an insulating part, such as a superconducting plastic part, thermally conductive adhesive, graphite, etc. When the heat-conducting shell 14 is a metal part, a thermally conductive insulating part can be provided between the heat-conducting shell 14 and the electrical component 12 and the heat spreader 16. The thermally conductive insulating part indirectly forms a heat conduction connection, preventing the current on the electrical component 12 from being conducted to the heat-conducting shell 14 and the heat spreader 16, thus reducing safety hazards. When the heat-conducting shell 14 is an insulating part, there is no need to worry about the current on the electrical component 12 being conducted to the heat-conducting shell 14. Therefore, the heat-conducting shell 14 can be in direct contact with the electrical component 12 and the heat spreader 16, forming a heat conduction connection through direct contact, shortening the heat transfer path, and improving heat transfer efficiency.

[0023] For example, the heat-conducting shell 14 and the heat-dissipating shell 18 are at least partially insulated heat-conducting areas, and the heat-spreading plate 16 is attached to the insulated heat-conducting areas of the heat-conducting shell 14 and the heat-dissipating shell 18 to form a heat conduction connection, thereby improving heat transfer efficiency.

[0024] In one embodiment, the thermal conductivity of the heat spreader 16 is greater than that of the heat-conducting shell 14. For example, the heat spreader 16 may be a vacuum chamber heat spreader, and the heat-conducting shell 14 may be a superconducting plastic component. The thermal conductivity of the vacuum chamber heat spreader is greater than that of the superconducting plastic component. The heat generated by the electrical component 12 is first transferred to the vacuum chamber heat spreader through the heat-conducting shell 14 made of superconducting plastic. The thermal conductivity of the heat spreader 16 is greater than that of the heat-conducting shell 14 to achieve better heat transfer from the heat-conducting shell 14 to the heat spreader 16. In this embodiment, the heat dissipation shell 18 and the heat-conducting shell 14 are made of the same material, both being superconducting plastic components, and the heat spreader 16 is a vacuum chamber heat spreader to improve the heat dissipation effect at the end cap 24. The heat dissipation shell 18 and the heat-conducting shell 14 may also be made of ordinary plastic components, and this is not a limitation.

[0025] In other embodiments, the thermal conductivity of the heat dissipation shell 18 is the same as that of the heat conduction shell 14, and the thermal conductivity of the heat dissipation shell 18 is greater than that of the outer side of the shell body 22. For example, both the heat dissipation shell 18 and the heat conduction shell 14 are made of superconducting plastic, which makes the heat dissipation effect of the electrical component 12 through the end cover 24 better. The outer side of the shell body 22 is the outer shell 50, which is usually made of ordinary plastic to save costs. The thermal conductivity of the superconducting plastic is greater than that of the ordinary plastic. By setting the thermal conductivity of the heat dissipation shell 18 to be greater than that of the outer shell 50, the heat dissipation effect at the end cover 24 is improved, and the heat generated by the electrical component 12 is effectively conducted to the end cover 24.

[0026] In one embodiment, one end of the plug 20 is thermally conductively connected to the heat-conducting shell portion 14 of the end cover 24. During use, the plug 20 needs to be inserted into the socket and not in contact with the outside air, or the area in contact with the outside air is limited. By making the plug 20 thermally conductively connected to the heat-conducting shell portion 14, the heat on the plug 20 can be conducted through the heat-conducting shell portion 14 to the heat spreader 16, and then from the heat spreader 16 to the heat dissipation shell portion 18, and finally dissipated into the surrounding air through the heat dissipation shell portion 18, reducing the temperature of the plug 20 and preventing the plug 20 from overheating and causing safety hazards. Moreover, the heat-conducting shell portion 14 is relatively close to the electrical component 12, and installing the plug 20 to the heat-conducting shell portion 14 facilitates the electrical connection between the plug 20 and the electrical component 12.

[0027] The pin 20 can be fixed to the end cap 24 to reduce manufacturing and assembly difficulty, or the end cap 24 can be rotatably mounted on the end cap 24 so that the pin 20 can rotate relative to the end cap 24 to switch between storage and use states.

[0028] Optionally, the end cap 24 is provided with a storage groove 26 for accommodating the pin 20. The storage groove 26 passes through the heat dissipation shell 18 and extends to the heat conduction shell 14. That is, part of the storage groove 26 is located on the heat dissipation shell 18 and part is located on the heat conduction shell 14. The pin 20 is rotatably mounted to the storage groove 26, so that the pin 20 can be rotated relative to the end cap 24 to be stored in the storage groove 26 or rotated out of the storage groove 26. When the charging device 100 is needed, the pin 20 can be rotated out of the storage groove 26. When it is not needed, the pin 20 can be rotated back into the storage groove 26, reducing the overall size of the charging device 100 when not in use, making it convenient for storage and carrying, and also protecting the pin 20. A clearance space 28 is formed on the heat spreader 16 corresponding to the storage groove 26 to avoid interference with the rotation of the pin 20.

[0029] The number of storage slots 26 can be one, in which case the volume of storage slot 26 is relatively large, and the two prongs 20 are stored in the same storage slot 26. Alternatively, the number of storage slots 26 can also be two, with the two storage slots 26 corresponding to the two prongs 20 respectively, and the two prongs 20 being stored in the two storage slots 26 respectively.

[0030] Optionally, the end cap 24 is provided with two spaced-apart storage slots 26 for storing two pins 20 respectively. The heat spreader 16 includes a first heat spreader 30 located between the two storage slots 26 and a second heat spreader 32 located outside the two storage slots 26, with a clearance space 28 located between the first heat spreader 30 and the second heat spreader 32. The first heat spreader 30 is thermally connected to the heat-conducting shell 14 and the heat-dissipating shell 18 respectively, and the second heat spreader 32 is thermally connected to the heat-conducting shell 14 and the heat-dissipating shell 18 respectively, so that the heat on the heat-conducting shell 14 can be conducted to the heat-dissipating shell 18 through both the first heat spreader 30 and the second heat spreader 32. By providing a first heat-spreading element 30 and a second heat-spreading element 32 between the two storage slots 26 and on the outside, the installation space on the heat-conducting shell 14 and the heat-dissipating shell 18 is fully utilized. Without affecting the rotation of the pin 20, the area of ​​the heat-spreading plate 16 is increased, thereby increasing the connection area between the heat-spreading plate 16 and the heat-conducting shell 14 and the heat-dissipating shell 18, so as to increase the heat conduction efficiency between the heat-spreading plate 16 and the heat-conducting shell 14 and the heat-dissipating shell 18.

[0031] In the arrangement direction of the two storage slots 26, the first heat-spreading element 30 and the second heat-spreading element 32 are spaced apart. In the direction perpendicular to the arrangement direction of the two storage slots 26, that is, in the extension direction of the storage slots 26, the first heat-spreading element 30 can be connected to the second heat-spreading element 32 or spaced apart from the second heat-spreading element 32. For example, in both the arrangement direction and the extension direction of the storage slots 26, the first heat-spreading element 30 is spaced apart from the second heat-spreading element 32. The first heat-spreading element 30 and the second heat-spreading element 32 are two completely independent parts, that is, the first heat-spreading element 30 and the second heat-spreading element 32 are two independent heat-spreading plates, to prevent the installation of the pin 20 from being affected by the connection of the first heat-spreading element 30 and the second heat-spreading element 32.

[0032] The second heat spreader 32 is generally U-shaped and includes two first heat spreaders 34 spaced apart and opposite to each other, and a second heat spreader 36 connected between the two first heat spreaders 34. The two receiving slots 26 and the first heat spreader 30 are located between the two first heat spreaders 34. That is, one receiving slot 26 is located between one side of the first heat spreader 30 and one first heat spreader 34, and the other receiving slot 26 is located between the other side of the first heat spreader 30 and another first heat spreader 34. The second heat spreader 36 is located at one end of the receiving slot 26 and is spaced apart from the receiving slot 26. The length of the first heat spreader 30 is less than the length of the first heat spreader 34, and the first heat spreader 30 and the second heat spreader 36 are spaced apart. By making the second heat-spreading element 32 U-shaped, heat-spreading portions are provided on the outer side of the receiving groove 26 in both the arrangement and extension directions, so as to increase the area of ​​the second heat-spreading element 32 and thereby increase the connection area between the heat-spreading plate 16 and the heat-conducting shell 14 and the heat-dissipating shell 18.

[0033] The first heat spreader 30 and the second heat spreader 36 are spaced apart. The end of the pin 20 near the second heat spreader 36 is rotatably mounted on the heat-conducting shell 14 via a rotating shaft. The distance between the first heat spreader 30 and the second heat spreader 36 is 5mm to 12mm. Controlling the distance between the first heat spreader 30 and the second heat spreader 36 within the range of 5mm to 12mm can avoid thermal interference caused by too small a distance, and also avoid the heat spreader plate 16 area being too small due to too large a distance, thus preventing the heat conduction and heat spreader plate 16 from being affected by improper spacing.

[0034] In one embodiment, the heat dissipation shell 18 has a receiving space 38 on the side near the heat conduction shell 14. The heat spreader 16 is housed in the receiving space 38, and the heat spreader 16 is attached to the inner wall of the receiving space 38, forming a heat conduction connection through direct contact. Housed in the receiving space 38, the heat spreader 16 increases the contact area between the heat spreader 16 and the heat dissipation shell 18, thereby improving the heat conduction efficiency between them. It also reduces the distance between the heat spreader and the outer surface of the heat dissipation shell 18, shortening the heat transfer path and improving heat dissipation efficiency. Furthermore, it prevents the heat spreader 16 from being exposed, thus protecting it.

[0035] Optionally, there are two accommodating spaces 38, one of which is located between the two storage slots 26, and the other is located outside the two storage slots 26. The first heat spreader 30 and the second heat spreader 32 are respectively housed in the two accommodating spaces 38.

[0036] The heat spreader 16 has a protrusion 40 on the side facing the heat dissipation shell 18, and the heat dissipation shell 18 has a recess 42. The protrusion 40 is inserted into the recess 42 and fits against the inner wall of the recess 42, which enhances the compactness of the structure and further increases the contact area between the heat spreader 16 and the heat dissipation shell 18, thereby improving the heat conduction effect.

[0037] Optionally, both the first heat-spreading member 30 and the second heat-spreading member 32 are provided with protrusions 40, and the inner wall of the accommodating space 38 is recessed to form recesses 42. There are multiple protrusions 40 and recesses 42, and they correspond one-to-one. The protrusions 40 are sheet-like structures, and the shape of the recesses 42 is adapted to the shape of the corresponding protrusions 40. The multiple protrusions 40 are arranged in a direction perpendicular to their extension direction.

[0038] The heat dissipation housing 18 is provided with heat dissipation holes 44 that communicate with the outside. The walls of the heat dissipation holes 44 can contact the outside air to increase the contact area between the heat dissipation housing 18 and the air, thereby increasing the heat dissipation area and improving the heat dissipation effect. The recessed portion 42 is located on one side of the heat dissipation hole 44 and is spaced apart from the heat dissipation hole 44, while the protruding portion 40 is located inside the recessed portion 42. The protruding portion 40 is located on one side of the heat dissipation hole 44 and is spaced apart from the heat dissipation hole 44 to reduce the distance between the protruding portion 40 and the wall of the heat dissipation hole 44, and at the same time, it can also prevent the protruding portion 40 from being exposed through the heat dissipation hole 44.

[0039] There are multiple heat dissipation holes 44, which are arranged at intervals to further increase the heat dissipation area of ​​the heat dissipation shell 18. The recessed portion 42 is located between adjacent heat dissipation holes 44.

[0040] The heat dissipation holes 44 can extend along the thickness direction of the heat dissipation shell 18 or in a direction perpendicular to the thickness direction of the heat dissipation shell 18. For example, when the heat dissipation holes 44 extend along the thickness direction, multiple heat dissipation holes 44 can be arranged in an array, and the recessed portion 42 is located between two adjacent rows or columns of heat dissipation holes 44. When the heat dissipation holes 44 extend in a direction perpendicular to the thickness direction, the heat dissipation holes 44 are elongated, and multiple heat dissipation holes 44 can be arranged in a direction perpendicular to their length direction, and the recessed portion 42 is located between two adjacent heat dissipation holes 44 in the arrangement direction.

[0041] In an optional example, the heat dissipation shell 18 and the heat-conducting shell 14 are arranged along the thickness direction of the heat dissipation shell 18. Heat dissipation holes 44 penetrate the heat dissipation shell 18 along a first direction perpendicular to the thickness direction, making the heat dissipation holes 44 elongated to increase the area of ​​the hole wall of a single heat dissipation hole 44. At least some of the heat dissipation holes 44 are spaced apart along a second direction, where both the thickness direction and the first direction are perpendicular to the second direction. In the second direction, a recessed portion 42 is located between two adjacent heat dissipation holes 44. The heat dissipation holes 44 form channels for air circulation, allowing external air to flow in from one end and out from the other. As air flows within the heat dissipation holes 44, it contacts the hole wall. The protrusion 40 is located between two adjacent heat dissipation holes 44, and the distance between it and the hole wall is small, which shortens the time it takes for heat to be conducted from the protrusion 40 to the hole wall, thereby improving heat dissipation efficiency.

[0042] For example, the heat sink 18 is a rectangular heat sink, the first direction is the length direction of the heat sink 18, and the second direction is the width direction of the heat sink 18.

[0043] Multiple heat dissipation holes 44 are distributed in two rows along the thickness direction. Both the first and second rows include multiple heat dissipation holes 44, and the multiple heat dissipation holes 44 in both the first and second rows are connected to the outside. The multiple heat dissipation holes 44 in the same row are arranged at intervals along the second direction, and the multiple heat dissipation holes 44 in the first and second rows correspond one-to-one in the thickness direction.

[0044] In other embodiments, the heat sink 18 may also have only one row of heat dissipation holes 44, so as to balance the heat dissipation effect and manufacturing difficulty of the heat sink 18.

[0045] The heat dissipation shell 18 has multiple grooves on the side away from the heat spreader 16. These grooves are spaced apart, and heat dissipation fins 46 are formed between adjacent grooves to further increase the contact area between the heat dissipation shell 18 and the air, thereby improving the heat dissipation effect. Optionally, the grooves penetrate the heat dissipation shell 18 along a first direction, and the multiple grooves are spaced apart along a second direction. The grooves and heat dissipation holes 44 are arranged in a one-to-one correspondence in the thickness direction.

[0046] In one embodiment, the housing body 22 includes an inner shell 48, an outer shell 50 covering the outside of the inner shell 48, and a heat-spreading shell 52 located between the inner shell 48 and the outer shell 50. The electrical component 12 is housed inside the inner shell 48. The heat-spreading shell 52 is thermally connected to the end cover 24, and the thermal conductivity of the heat-spreading shell 52 is greater than that of the inner shell 48 and the outer shell 50. When the electrical component 12 is working, it generates heat, making the temperature of the electrical component 12 and its surrounding area relatively high. The heat in the relatively high temperature area can be conducted through the inner shell 48 to the heat-spreading shell 52, and then diffused on the heat-spreading shell 52 to prevent the local temperature of the charging device 100 from becoming too high. The heat on the heat-spreading shell 52 can also be conducted to the end cover 24 and dissipated into the surrounding air through the heat dissipation shell portion 18 of the end cover 24, thereby reducing the overall temperature of the charging device 100.

[0047] The heat spreader 52 is thermally connected to the end cap 24. This can mean that the heat spreader 52 is thermally connected to the heat spreader plate 16, or that the heat spreader 52 is thermally connected to the heat conduction shell 14 or the heat dissipation shell 18, as long as the heat on the heat spreader 52 can be conducted to the heat dissipation shell 18. In an optional example, the heat spreader 52 is thermally connected to the heat spreader plate 16. The heat on the heat spreader 52 is first conducted to the heat spreader plate 16, and then rapidly diffused on the heat spreader plate 16 before being conducted to the heat dissipation shell 18, thereby reducing the diffusion thermal resistance.

[0048] Optionally, the shape of the heat spreader 52 is adapted to the shapes of the inner shell 48 and the outer shell 50. The heat spreader 52 covers the outside of the inner shell 48, and the outer shell 50 covers the outside of the heat spreader 52. The heat spreader 52 is a metal shell, such as an aluminum alloy shell, to provide good thermal conductivity. Both the inner shell 48 and the outer shell 50 are insulating shells, such as PC shells. The metal shell is sandwiched between the two insulating shells to prevent current from the electrical component 12 from being conducted to the metal shell and causing a safety hazard. The thickness of the inner shell 48 and the outer shell 50 is greater than the thickness of the heat spreader 52, so that the shell 10 has sufficient strength while reducing the impact of the heat spreader 52 on the overall weight.

[0049] In other embodiments, a heat-conducting element may be provided between the electrical component 12 and the heat-spreading shell 52. The electrical component 12 is thermally connected to the heat-spreading shell 52 through the heat-conducting element to improve the heat conduction efficiency between the electrical component 12 and the heat-spreading shell 52. For example, a through hole may be provided on the inner shell 48. One end of the heat-conducting element is located on the inner wall of the inner shell 48 and is thermally connected to the electrical component 12, while the other end passes through the through hole on the inner shell 48 and is thermally connected to the heat-spreading shell 52.

[0050] The inner shell 48 has a receiving portion 54 at one end near the end cap 24. The receiving portion 54 is spaced a certain distance from the surface of the inner shell 48 near the heat-spreading shell 52. That is, the inner shell 48 has a stepped structure at one end near the end cap 24 to form the receiving portion 54. The periphery of the heat-conducting shell portion 14 is located inside the receiving portion 54 to increase the contact area between the heat-conducting shell portion 14 and the inner shell 48 for fixing operations.

[0051] The inner wall of the receiving part 54 is recessed to form a relief groove 56, which penetrates the inner shell 48 on the side facing the heat dissipation shell 52. The relief groove 56 is located between the heat dissipation shell part 18 and the heat dissipation shell 52. A bending part 58 is provided on one side of the heat dissipation plate 16. The bending part 58 extends away from the heat dissipation shell part 18. The bending part 58 is inserted into the relief groove 56 and fits against the heat dissipation shell 52, thereby forming a thermal conductive connection between the heat dissipation shell 52 and the heat dissipation plate 16.

[0052] Optionally, the heat spreader 16 is provided with bending portions 58 on opposite sides, and the two inner walls of the receiving portion 54 are recessed to form relief grooves 56. Each bending portion 58 is inserted into a corresponding relief groove 56, and the two bending portions 58 are respectively attached to the opposite sides of the heat spreader shell 52 to enhance the reliability of the heat conduction connection between the heat spreader shell 52 and the heat spreader 16.

[0053] In one embodiment, a heat-conducting bracket 60 is provided inside the housing 10. The heat-conducting bracket 60 is located outside the electrical component 12 and is conductively connected to both the electrical component 12 and the heat-conducting shell portion 14. Heat on the electrical component 12 can be conducted to the heat-conducting shell portion 14 through the heat-conducting bracket 60. The heat-conducting bracket 60 has better thermal conductivity than air, allowing heat on the electrical component 12 to be conducted to the heat-conducting shell portion 14 more quickly.

[0054] The heat-conducting bracket 60 can be a metal bracket or an insulating bracket. When it is a metal bracket, an insulating heat-conducting shell 14, such as heat-conducting adhesive, can be provided between the heat-conducting bracket 60 and the electrical component 12. When it is an insulating bracket, the heat-conducting bracket 60 can be attached to the electrical component 12.

[0055] There are multiple electrical components 12, and gaps are formed between at least some of the adjacent electrical components 12. The heat-conducting bracket 60 includes a frame and an extension connected to the inner side of the frame. The frame is arranged around the outer side of the electrical components 12 so as to connect with the electrical components 12 and the heat-conducting shell 14. The extension extends into the gaps between the electrical components 12 to conduct the heat in the gaps to the heat-conducting shell 14, so as to avoid heat accumulation in the relatively small gaps and reduce the temperature of the environment around the electrical components 12.

[0056] The heat-conducting shell 14 includes a heat-conducting part 62 and a fixing part 64 connected to the outside of the heat-conducting part 62. The heat-conducting part 62 is thermally connected to the electrical component 12 and the heat dissipation shell 18, respectively. The fixing part 64 is fixedly connected to the shell body 22. Optionally, the heat-conducting part 62 is thermally connected to the electrical component 12 through a heat-conducting bracket 60, and the heat-conducting part 62 is thermally connected to the heat spreader 16 by bonding. The fixing part 64 is located on one side of the heat-conducting bracket 60 to support the heat-conducting bracket 60. A flange is formed on the outer periphery of the fixing part 64, and the flange is located in the receiving part 54 of the inner shell 48. The heat-conducting shell 14 needs to be thermally connected to the electrical component 12 and the heat dissipation shell 18 to conduct heat, and it also needs to be fixedly connected to the inner shell 48 to prevent the end cap 24 from falling off the inner shell 48. Therefore, the heat-conducting shell 14 is divided into a heat-conducting part 62 and a fixing part 64. The heat-conducting part 62 and the fixing part 64 can be made of different materials. The heat-conducting part 62 forms a reliable heat conduction connection, and the fixing part 64 forms a reliable fixing connection, so that the heat-conducting shell 14 can simultaneously achieve both heat conduction and fixing effects.

[0057] Optionally, the fixing part 64 is annular and surrounds the outer periphery of the heat-conducting part 62 in order to increase the contact area between the heat-conducting shell part 14 and the inner shell 48, and facilitate the connection between the heat-conducting shell part 14 and the inner shell 48.

[0058] In an alternative example, both the heat-conducting bracket 60 and the heat-conducting part 62 are made of superconducting plastic, giving them both good thermal conductivity and insulation. The fixing part 64 and the inner shell 48 can be made of the same material, such as PC. The heat-conducting part 62 and the fixing part 64 are integrally molded in the direction of injection molding, thereby fixing them together. The fixing part 64 and the inner shell 48 are fixed together by ultrasonic welding to ensure the connection strength between the heat-conducting shell 14 and the inner shell 48 and reduce the risk of the end cap 24 falling off the inner shell 48.

[0059] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A charging device, characterized in that, The device includes a housing body, an end cap located at one end of the housing body, an electrical component located within the housing body, and a pin located on the end cap and electrically connected to the electrical component. The end cap includes a heat-conducting shell portion, a heat-spreading plate, and a heat-dissipating shell portion. The heat-spreading plate is located between the heat-conducting shell portion and the heat-dissipating shell portion, and an accommodating space is formed between the heat-dissipating shell portion and the heat-conducting shell portion. The heat-spreading plate is housed within the accommodating space and is thermally connected to both the heat-conducting shell portion and the heat-dissipating shell portion. The heat-conducting shell portion is located on the side of the heat-spreading plate closer to the electrical component. The heat-dissipating shell portion is located on the side of the heat-spreading plate away from the electrical component, and at least part of the heat-dissipating shell portion is exposed to the outside. The heat-conducting shell portion includes a heat-conducting part and a fixing part connected to the outside of the heat-conducting part. The heat-conducting part is thermally connected to both the electrical component and the heat-dissipating shell portion, and the fixing part is fixedly connected to the housing body.

2. The charging device according to claim 1, characterized in that, The end cap is provided with a storage groove for accommodating the pin. The storage groove passes through the heat dissipation shell and extends to the heat conduction shell. The heat spreader forms a clearance space corresponding to the storage groove. The pin is rotatably installed into the storage groove.

3. The charging device according to claim 2, characterized in that, The end cap is provided with two spaced-apart storage slots. The heat spreader includes a first heat spreader located between the two storage slots and a second heat spreader located outside the two storage slots. Both the first heat spreader and the second heat spreader are thermally connected to the heat-conducting shell and the heat dissipation shell. The clearance space is located between the first heat spreader and the second heat spreader.

4. The charging device according to claim 3, characterized in that, The second heat spreader includes two first heat spreaders spaced apart and opposite to each other, and a second heat spreader connected between the two first heat spreaders. The receiving groove and the first heat spreader are located between the two first heat spreaders, and the second heat spreader is located at one end of the receiving groove and spaced apart from the first heat spreader.

5. The charging device according to claim 4, characterized in that, The distance between the first heat-spreading element and the second heat-spreading part is 5mm to 12mm.

6. The charging device according to claim 1, characterized in that, The thermal conductivity of the heat spreader is greater than that of the heat-conducting shell; and / or, the heat dissipation shell is made of the same material as the heat-conducting shell, and the thermal conductivity of the heat dissipation shell is greater than that of the outer side of the shell body.

7. The charging device according to claim 1, characterized in that, The main body of the housing includes an inner housing that houses the electrical components, an outer housing that covers the outside of the inner housing, and a heat-spreading housing located between the inner housing and the outer housing, wherein the heat-spreading housing is thermally connected to the end cap.

8. The charging device according to claim 7, characterized in that, The heat spreader shell is connected to the heat spreader plate.

9. The charging device according to claim 7, characterized in that, The inner shell has a receiving portion at one end near the end cap, and the periphery of the heat-conducting shell portion is located inside the receiving portion; The inner wall of the storage section is recessed to form a relief groove, which penetrates the inner shell on the side facing the heat spreader shell. A bending part is provided on one side of the heat spreader plate, which is located in the relief groove and fits against the heat spreader shell.

10. The charging device according to any one of claims 1-9, characterized in that, The heat spreader plate has a protrusion on one side facing the heat dissipation shell, and the heat dissipation shell has a recess. The protrusion is inserted into the recess and fits against the inner wall of the recess.

11. The charging device according to claim 10, characterized in that, The heat dissipation shell is provided with a heat dissipation hole that communicates with the outside, and the recessed part is located on one side of the heat dissipation hole and is spaced apart from the heat dissipation hole.

12. The charging device according to claim 11, characterized in that, The heat dissipation shell and the heat conduction shell are arranged along the thickness direction of the heat dissipation shell, and the heat dissipation hole penetrates the heat dissipation shell along a first direction perpendicular to the thickness direction; The number of heat dissipation holes is multiple, and at least some of the heat dissipation holes are arranged at intervals along a second direction perpendicular to the first direction and the thickness direction. In the second direction, the recessed portion is located between two adjacent heat dissipation holes.

13. The charging device according to any one of claims 1-9, characterized in that, The shell body is provided with a heat-conducting bracket, which is located on the outside of the electrical component and is thermally connected to both the electrical component and the heat-conducting shell.

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