Charging device

Abstract

The invention provides a charging device which comprises a shell, a heat dissipation device and a heating module are arranged in the shell, the heat dissipation device and the heating module are arranged adjacently, and one end, away from the heating module, of the heat dissipation device is located outside the shell; the heat dissipation device comprises a box body, a heat storage plate and a magnetic plate, the heat storage plate and the magnetic plate are located in the box body and arranged in a spaced mode, and magnetic field applying modules are arranged on the two sides of the box body and used for periodically applying a magnetic field to the magnetic plate and removing the magnetic field; the magnetic plates can periodically and alternately contact with the adjacent heat storage plates on the two sides to conduct heat outwards so as to dissipate heat of the heating module. According to the charging device, heat is conducted outwards by controlling the magnetic plate and the magnetic field applying module to act, and therefore stable heat dissipation is conducted on a heating element in the charging device; in the whole process, air convection does not exist, wet air or dust particles cannot be introduced, and it can be ensured that the charging device keeps a stable temperature during long-time high-load operation.

Description

Technical Field

[0001] The present invention relates to the technical field of charging devices, and in particular to a charging device. Background Art

[0002] With the rapid development of electric vehicles, the demand for charging devices is growing, and the charging power of charging devices is constantly increasing, from the initial 20KW to today's 1000KW ultra-fast charging; at the same time, the heat generated by the power module inside the charging device is also increasing sharply, and temperature control is becoming more and more difficult.

[0003] Traditional charging devices mostly use air cooling, that is, heat exchange is performed through air to passively achieve the cooling effect. In high-power charging devices, especially charging devices that increase the charging current, it is difficult to achieve the cooling effect through the air cooling mode. For this reason, the Chinese patent application number 201610864226.5 is an early patent of the applicant, which discloses a charging device, including a pile body, a display module, a control module, a charging circuit module, a charging module and a charging plug. The pile body includes a heat dissipation cabinet, including a heating element accommodating part, a refrigerant heat dissipating part and an air cooling part; the refrigerant heat dissipating part is located below the heating element accommodating part, and the air cooling part is located above the refrigerant heat dissipating part; the heating element accommodating part is used to place the main heating circuit of the charging device; the refrigerant heat dissipating part is used to place the main cooling device that provides a cold source to the heating element accommodating part; the air cooling part is used to place an air cooling device that cools the air. This solution cools the heating circuit by combining air cooling, liquid cooling and spray cooling, and has a good heat dissipation effect; but its structure is relatively complex and difficult to manufacture.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The problem solved by the present invention is that the structure of the existing charging device is unreasonable, which not only has potential safety hazards but also has poor heat dissipation effect.

[0006] In order to solve the above problems, the present invention provides a charging device, including a shell, in which a heat dissipation device and a heating module are arranged, the heat dissipation device is arranged adjacent to the heating module and one end away from the heating module is located outside the shell; the heat dissipation device includes a box body, a heat storage plate, and a magnetic plate, the heat storage plate and the magnetic plate are located in the box body and are arranged at intervals from each other, and magnetic field application modules are arranged on both sides of the box body for periodically applying a magnetic field to and removing the magnetic field from the magnetic plate; the magnetic plate can periodically contact the heat storage plates adjacent to both sides alternately to conduct heat outward to dissipate heat from the heating module.

[0007] This setting uses the principle of thermomagnetic effect to conduct heat outward by controlling the action of the magnetic plate and the magnetic field application module, thereby stably dissipating the heat of the heating elements inside the charging device; the entire process does not require the use of traditional refrigerants such as Freon and gas compressors, and has a simple structure and low operating costs; the heat dissipation device will not cause thermal convection of the air, and will not send humid air and dust particles into the charging device, ensuring that the charging device maintains a stable temperature during long-term high-load operation, thereby improving its performance and reliability.

[0008] Preferably, the heating module is a charging unit and / or a central processing unit, the charging unit is electrically connected to the central processing unit, and the output end of the charging unit is connected to a charging gun for charging the electric vehicle.

[0009] Preferably, the box is made of non-heat-conducting material and a heat-insulating layer is arranged on the outer surface of the box. This arrangement can ensure that the heat sink is less affected by the ambient temperature, and at the same time, the heat dissipation of the heat sink is mainly heat conduction led by the magnetic plate, with less heat convection; it ensures that there is a temperature difference between adjacent heat storage plates, and the heat dissipation effect inside the charging device is good. The shape of the box can be a cube, a cuboid or other shapes.

[0010] Preferably, the heat storage plates are rectangular thin plates and are arranged in sequence, there are multiple magnetic plates and they are spaced apart from the heat storage plates, the heat storage plates selectively contact the magnetic plates on the adjacent two sides by periodic rotation or reciprocating movement, or the magnetic plates selectively contact the heat storage plates on the adjacent two sides by periodic rotation or reciprocating movement to conduct heat outward. The transmission structure of this arrangement is simple, the transmission is stable and reliable, and it is easy to produce and process.

[0011] Preferably, a power unit is arranged at one end of the box, and the output end of the power unit is connected to the magnetic plate through a heat-insulating connecting rod, so as to drive the magnetic plate to rotate forward or reverse and selectively contact one of the two adjacent heat storage plates. This arrangement can prevent the cold or heat of the magnetic plate from being transferred to the power unit, ensuring the stable and reliable operation of the power unit; it has a simple structure, stable and reliable transmission and low production cost.

[0012] Preferably, the magnetic plate comprises a first end plate and a second end plate which are arranged opposite to each other, an assembly hole is arranged between the first end plate and the second end plate for transmission connection with the heat-insulating connecting rod, and the projection lengths of the first end plate and the second end plate on the horizontal plane are L1 and L2 respectively, wherein L1<L2. This arrangement makes the axis of the magnetic plate close to its center position, ensuring that the force on both ends of the magnetic plate in the length direction is relatively uniform; the rotation of the magnetic plate enables the second end plate to contact the adjacent heat storage plate, while the first end plate will not contact the heat storage plate on the other side, ensuring that the magnetic plate contacts the adjacent heat storage plates respectively, and the heat transfer is stable and reliable.

[0013] Preferably, the second side wall surface and the third side wall surface 4422 are respectively connected on both sides of the second end plate, and the second side wall surface is arranged close to the first end plate, and the planes where the two second side wall surfaces are arranged oppositely form an angle α1, and the planes where the two third side wall surfaces are arranged oppositely form an angle α2, wherein α1<α2. This arrangement can ensure that the second side wall surface fits with the side wall surface of the adjacent heat storage plate after the second end plate rotates a certain angle, ensuring that the two are in surface contact, and the heat transfer efficiency is high.

[0014] Preferably, the first end plate comprises first side walls arranged opposite to each other, the two first side walls are arranged vertically and the planes on which they are located form an angle α3, wherein α1<α3<α2. This arrangement can ensure that the first end plate will never contact the adjacent heat storage plate during the rotation process, and at the same time can make the distance between the magnetic plate and the heat storage plate as small as possible, the overall structure is compact, and the heat transfer efficiency is high.

[0015] Preferably, the heat dissipation device includes a heat conducting plate, which is located on one side of the box body close to the charging unit, and is arranged parallel to the heat storage plate and is arranged in contact with the heat storage plate at one end of the box body. This arrangement can quickly conduct the heat generated by the charging unit to the heat storage plate at one end of the box body through the heat conducting plate, and then quickly conduct it outward through the heat dissipation device, thereby achieving a good heat dissipation effect.

[0016] Preferably, the heat dissipation device further comprises a heat dissipation plate, which is arranged outside the housing and located on a side of the box body away from the charging unit, and the side wall surface of the heat dissipation plate is arranged in contact with the side wall of the heat storage plate located at the other end of the box body. This arrangement can quickly dissipate the heat conducted by the heat dissipation device through the heat dissipation plate, so that the temperature difference at both ends of the heat dissipation device is obvious and the heat dissipation effect is good.

[0017] Compared with the prior art, the charging device of the present invention has the following beneficial effects: 1) The principle of thermomagnetic effect is utilized to control the action of the magnetic plate and the magnetic field application module to conduct heat outward, thereby stably dissipating the heat of the heating elements inside the charging device, and ensuring that the charging device maintains a stable temperature during long-term high-load operation, thereby improving its performance and reliability; 2) The magnetic plate and the transmission structure are optimized to make the force on both sides relatively uniform, and the transmission is stable and reliable; 3) The entire process does not require the use of traditional refrigerants such as Freon and gas compressors, and has a simple structure and low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the internal structure of the charging device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the heat dissipation device according to an embodiment of the present invention;

[0020] Figure 3 It is a schematic transverse cross-sectional view of a heat dissipation device according to an embodiment of the present invention;

[0021] Figure 4 A longitudinal cross-sectional schematic diagram of a heat dissipation device according to an embodiment of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the magnetic plate according to an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the heat-insulating connecting rod according to an embodiment of the present invention

[0024] Figure 7 is a cross-sectional schematic diagram of a ball assembly according to an embodiment of the present invention;

[0025] Figure 8 It is an exploded schematic diagram of the ball assembly described in the embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 10-housing; 1-CPU; 2-charging unit; 21-rectifier module; 22-power change module; 3-charging gun; 4-heat dissipation device; 41-box; 411-bottom plate; 412-insulation layer; 42-magnetic field application module; 43-heat storage plate; 44-magnetic plate; 441-first end plate; 4411-first side wall; 442-second end plate; 4421-second side wall; 4422-third side wall; 443-assembly hole; 45-heat conduction plate; 46-heat sink; 47-power unit; 48-insulating connecting rod; 481-first connecting part; 482-second connecting part; 483-first limiting boss; 484-first plug-in hole; 49-ball assembly; 491-base; 4911-accommodating cavity; 4912-reinforcing rib; 4913-buckle; 4914-limiting block; 492-ball; 493-upper cover; 4931-installation groove; 4932-avoidance hole; 4933-limiting notch; 5-fan assembly. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Under the premise of different conflicts, the technical features of the embodiments of the present invention can be combined with each other.

[0029] It should be noted that all the terms used in the present invention for directional and positional indications, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0032] In recent years, the charging device for charging electric vehicles has developed rapidly. The charging unit 2 of the charging device generates heat during the charging process. If it is not dissipated in time, it will affect the operating stability of the central processor 1 and even cause fire hazards. For this reason, air cooling or water cooling is usually used to dissipate heat and cool it down, but the operating power of air cooling is large and the heat dissipation effect is not good, and the hardware structure of other methods is complex, resulting in high production costs and is not conducive to industrialization.

[0033] By utilizing the magnetocaloric effect (MCE) of magnetic materials and completing periodic magnetic phase changes under the action of a magnetic field, efficient cooling and heat dissipation can be achieved at low energy consumption. The specific working principle is: when the magnetic material is magnetized, the magnetic moment order increases, resulting in a decrease in magnetic entropy and an increase in temperature, thereby releasing heat to the outside world; and when the magnetic material is demagnetized, the magnetic moment order decreases, resulting in an increase in magnetic entropy and a decrease in temperature, and absorbing heat from the outside world. Due to its high efficiency and energy saving, green environmental protection, and easy miniaturization, the use of magnetic refrigeration technology to dissipate heat from charging devices has broad application prospects. To this end, the applicant proposes the following technical solution:

[0034] like Figure 1-8 As shown, a charging device comprises a shell 10, wherein a central processing unit 1 and a charging unit 2 are connected to each other in the shell 10, wherein the output end of the charging unit 2 is connected to a charging gun 3 for charging a battery module; a heat dissipation device 4 is arranged on one side of the charging unit 2, wherein the heat dissipation device 4 is located outside the shell 10 on a side away from the charging unit 2, and is used for dissipating heat from the charging unit 2 and / or the central processing unit 1; the heat dissipation device 4 comprises a box 41, a heat storage plate 43, and a magnetic plate 44, wherein the heat storage plate 43 and the magnetic plate 44 are located in the box 41 and are spaced apart from each other, and magnetic field application modules 42 are arranged on both sides of the box 41 for periodically applying a magnetic field to and removing a magnetic field from the magnetic plate 44; the magnetic plate 44 can periodically contact alternately with the heat storage plates 43 arranged adjacent to each other on both sides to conduct heat outward.

[0035] Specifically, when the magnetic field applying module 42 applies a magnetic field to the magnetic plate 44, the temperature of the magnetic plate 44 increases due to the magnetocaloric effect and is in a heating state. At this time, the magnetic plate 44 selectively contacts the heat storage plate 43 on the side away from the charging unit 2 and conducts the heat outward; when the magnetic field applied by the magnetic field applying module 42 is eliminated, the magnetic plate 44 is reduced due to the magnetocaloric effect and produces an endothermic effect. The magnetic plate 44 selectively contacts the heat storage plate 43 on the side close to the charging unit 2 and takes away its heat; as the magnetic plate 44 alternately contacts the heat storage plates 43 on both sides and absorbs and dissipates heat, heat is transferred from the heat storage plate 43 on the side close to the charging unit 2 or the central processor 1 to the heat storage plate 43 on the other side, so that the heat is continuously conducted from the inside of the charging device to the outside to achieve heat dissipation. This setting makes the heat dissipation effect of the charging device unaffected by the external temperature, has good heat dissipation effect and extremely low energy consumption, and has strong market competitiveness.

[0036] As an example of the present invention, the charging device also includes a fan assembly 5, which is located in the shell 10 and is used to perform air cooling on the central processor 1 and / or the charging unit 2. This setting can be used in conjunction with the heat dissipation device 4 to improve the heat dissipation effect of the charging device and reduce operating energy consumption. For example, when the temperature of the charging unit 2 is low, the heat dissipation device 4 is used for heat dissipation; when the temperature is higher than the preset value, the fan assembly 5 is turned on for forced air cooling; the heat dissipation device 4 can reduce the temperature rise rate inside the charging device, and reduce the operating time of the fan assembly 5 to reduce energy consumption; at the same time, the cooperation between the two can reduce the maximum temperature inside the shell 10, and the operation is more stable and reliable. The specific structure and assembly position of the fan assembly 5 are prior art and will not be repeated here.

[0037] As an example of the present invention, the charging unit 2 includes a connected rectifier module 21 and a power change module 22, wherein the rectifier module 21 converts the input alternating current (AC) into direct current (DC) for charging the electric vehicle battery, and the power change module 22 is responsible for adjusting the output voltage and current to accurately match the charging requirements of the electric vehicle battery, and at the same time removes the electrical noise generated in the rectification process through a filter to make the output DC more stable. Its specific structure and assembly relationship are prior art and will not be repeated here.

[0038] Preferably, the box body 41 itself is non-heat-conductive and a heat-insulating layer 412 is provided on the outer surface. This arrangement can ensure that the heat sink 4 is less affected by the ambient temperature, and the heat dissipation of the heat sink 4 is mainly heat conduction led by the magnetic plate 44, with less heat convection; ensuring that there is a temperature difference between adjacent heat storage plates 43, and having a good heat dissipation effect inside the charging device. The box body 41 can be in the shape of a cube, a cuboid or other shapes.

[0039] As an example of the present invention, the magnetic field applying module 42 can be a permanent magnet, which can move along the arrangement direction of the heat storage plate 43 or the magnetic plate 44, so as to apply or remove the magnetic field to the magnetic plate 44; the magnetic field applying module 42 can also be an electromagnet, which applies or removes the magnetic field by controlling the current flowing through the electromagnet. The magnetic plate 44 is made of a material having a magnetocaloric effect, such as Ni2MnGa alloy, GdGeSi-based compound, LaFe13-based compound, or LaFe13H-based compound; the material of the heat storage plate 43 can be a metal such as aluminum, copper, iron or stainless steel, or a non-metallic material such as silicon or carbon, or a ceramic such as aluminum nitride, silicon carbide or aluminum oxide.

[0040] As an example of the present invention, the heat storage plate 43 is a rectangular thin plate and is arranged in sequence. There are multiple magnetic plates 44 and they are spaced apart from the heat storage plate 43. The heat storage plate 43 selectively contacts the magnetic plates 44 on the adjacent two sides by periodic rotation or reciprocating movement, or the magnetic plates 44 selectively contact the heat storage plates 43 on the adjacent two sides by periodic rotation or reciprocating movement to conduct heat outward. The transmission structure of this arrangement is simple, the transmission is stable and reliable, and it is easy to produce and process. The multiple magnetic plates 44 act synchronously with the magnetic field application module 42, or the multiple magnetic plates 44 move periodically in a wave-like manner to conduct heat outward.

[0041] Preferably, a sealing ring is provided on the outer peripheral side of the heat storage plate 43, and the heat storage plate 43 is sealed and connected to the box body. This arrangement can ensure that there is no heat convection in the box body 41, and the whole process will not introduce air into the charging device, which is conducive to dust prevention and dehumidification.

[0042] Preferably, a power unit 47 is provided at one end of the box body 41, and the output end of the power unit 47 is connected to the magnetic plate 44 through a heat-insulating connecting rod 48, so as to drive the magnetic plate 44 to rotate forward or reversely and selectively contact one of the heat storage plates 43 on the adjacent two sides. This arrangement can prevent the cold or heat of the magnetic plate 44 from being transferred to the power unit 47, thereby ensuring the stable and reliable operation of the power unit 47; the structure is simple, the transmission is stable and reliable, and the production cost is low. As another example of the present invention, each magnetic plate 44 can be driven by a power unit 47 alone, or multiple magnetic plates 44 can be driven by the same power unit 47 through a transmission structure.

[0043] As an example of the present invention, the magnetic plate 44 includes a first end plate 441 and a second end plate 442 which are arranged opposite to each other. An assembly hole 443 is arranged between the first end plate 441 and the second end plate 442 for transmission connection with the heat insulating connecting rod 48. The projection lengths of the first end plate 441 and the second end plate 442 on the horizontal plane are L1 and L2 respectively, wherein L1<L2. This arrangement makes the axis of the magnetic plate 44 close to its center position, ensuring that the force on both ends of the magnetic plate 44 in the length direction is relatively uniform; the rotation of the magnetic plate 44 enables the second end plate 442 to contact the adjacent heat storage plate 43, while the first end plate 441 will not contact the heat storage plate 43 on the other side, ensuring that the magnetic plate 44 contacts the adjacent heat storage plates 43 respectively, and the heat transfer is stable and reliable.

[0044] Preferably, the second side wall surface 4421 and the third side wall surface 4422 are respectively connected on both sides of the second end plate 442, and the third side wall surface 4422 is arranged close to the first end plate 441. The planes where the two second side wall surfaces 4421 are arranged opposite to each other form an angle α1, and the planes where the two third side wall surfaces 4422 are arranged opposite to each other form an angle α2, wherein α1<α2. This arrangement can ensure that the second side wall surface 4421 fits with the side wall surface of the adjacent heat storage plate 43 after the second end plate 442 rotates a certain angle, ensuring that the two are in surface contact, and the heat transfer efficiency is high.

[0045] Preferably, the first end plate 441 includes first side wall surfaces 4411 arranged opposite to each other, and the two first side wall surfaces 4411 are arranged vertically and the planes on which they are located form an angle α3, wherein α1<α3<α2. This arrangement can ensure that the first end plate 441 will never contact the adjacent heat storage plate 43 during the rotation process, and at the same time, the distance between the magnetic plate 44 and the heat storage plate 43 can be minimized, the overall structure is compact, and the heat transfer efficiency is high.

[0046] As an example of the present invention, the heat-insulating connecting rod 48 includes a first connecting portion 481 and a second connecting portion 482. The first connecting portion 481 is provided with a first plug hole 484 at one end away from the second connecting portion 482, which is used to connect the rotating shaft of the power unit 47; the second connecting portion 482 can be inserted into the assembly hole 443 of the magnetic plate 44 to drive it to rotate as a whole. This arrangement ensures the effective transmission of power, and at the same time realizes the integrated rotation of the heat-insulating connecting rod 48 and the magnetic plate 44, thereby simplifying the assembly process and improving the stability and rotation efficiency of the overall structure.

[0047] As a preferred example of the present application, the cross-sectional area of ​​the first connecting portion 481 is greater than the cross-sectional area of ​​the second connecting portion 482, and a first limiting boss 483 is provided on the outer surface of the first connecting portion 481, and the first limiting boss 483 is used to limit the insulation connecting rod 48 when it passes through the top wall of the box body 41.

[0048] As an example of the present invention, the outer contour of the cross-sectional area of ​​the first connecting part 481 is circular, the outer contour of the cross-sectional area of ​​the second connecting part 482 is oblong, and the first plug hole 484 opened at one end of the first connecting part 481 is also designed to be oblong, so that the rotating shaft of the power unit 47 is inserted into the first plug hole 484, and the second connecting part 482 is inserted into the assembly hole 443 at the upper end of the magnetic plate 44, and can be smoothly plugged in even if there is a slight deviation, thereby improving the compatibility of the assembly and the stability of the transmission. This design enhances the stability of the structure through the optimization design of the shape, size and structure, ensures long-term stable operation, optimizes the stress distribution, reduces the stress concentration phenomenon, and prolongs the service life. The setting of the first limiting boss 483 can improve the insulation connecting rod 48 and simplify the installation process in the box body 41, thereby improving the installation efficiency and accuracy.

[0049] As an example of the present invention, the heat dissipation device 4 includes a heat conducting plate 45, which is located on one side of the box 41 close to the charging unit 2. The heat conducting plate 45 is arranged parallel to the heat storage plate 43 and is arranged in close contact with the heat storage plate 43 at one end of the box 41. This arrangement can quickly conduct the heat generated by the charging unit 2 to the heat storage plate 43 at one end of the box 41 through the heat conducting plate 45, and then quickly conduct it outward through the heat dissipation device 4, and the heat dissipation effect is good.

[0050] Preferably, the heat dissipation device 4 further includes a heat dissipation plate 46, which is disposed outside the housing 10 and located on a side of the box 41 away from the charging unit 2, and a side wall surface of the heat dissipation plate 46 is arranged in contact with a side wall of a heat storage plate 43 located at the other end of the box 41. This arrangement can quickly dissipate the heat conducted by the heat dissipation device 4 through the heat dissipation plate 46, so that the temperature difference at both ends of the heat dissipation device 4 is obvious and the heat dissipation effect is good.

[0051] Preferably, a ball assembly 49 is provided on the bottom plate 411 of the box body 41, and a sleeve (not shown in the figure) is provided at one end of the magnetic plate 44 away from the assembly hole 443, and the sleeve is sleeved on the ball assembly 49. This arrangement can ensure that the bottom of the magnetic plate 44 is in point contact with the ball assembly 49, with low running resistance and low noise.

[0052] As an example of the present invention, the ball assembly 49 includes a base 491, which is installed on the bottom plate 411 of the box body 41, and the upper part of the base 491 is provided with a receiving cavity 4911; the ball 492 is rotatably assembled in the receiving cavity 4911; the upper cover 493 is detachably connected to the base 491, and is used to cooperate with the receiving cavity 4911 to limit the ball 492; the upper cover 493 is provided with an avoidance hole 4932, and the upper part of the ball 492 protrudes from the avoidance hole 4932 and abuts against the upper end surface of the sleeve to support it. This setting makes the lower end of the magnetic plate 44 point contact, with small running resistance and low noise; the overall structure is simple and convenient for production and processing.

[0053] Preferably, the accommodating cavity 4911 includes a first cavity and a second cavity which are connected, the first cavity is hemispherical, the second cavity is located above the first cavity and is cylindrical, and the upper cover 493 is detachably covered on the second cavity. This arrangement can limit the assembly position of the ball 492 and provide installation space for the assembly of the upper cover 493, so as to minimize the overall height of the ball assembly 49 in the box body 41, and the effective volume of the magnetic plate 44 is large, and the heat dissipation effect is good.

[0054] Preferably, the inner wall of the accommodating cavity 4911 is provided with reinforcing ribs 4912, and the reinforcing ribs 4912 are multiple and arranged in a circular array with the lowest point of the accommodating cavity 4911 as the center, and the reinforcing ribs 4912 are formed by the protrusion of the accommodating cavity 4911 and the projection on the horizontal plane is a straight line segment. This arrangement can make the base 491 have a certain deformation ability and not easily break or damage, and at the same time minimize the contact area between the ball 492 and the reinforcing ribs 4912, further reducing the rolling resistance.

[0055] As an example of the present invention, the base 491 and the upper cover 493 are detachably connected through an assembly structure, and the assembly structure includes a buckle 4913 and a mounting groove 4931. The buckle 4913 is located on one of the base 491 and the upper cover 493, and the mounting groove 4931 is located on the other of the base 491 and the upper cover 493. The buckle 4913 is limitedly assembled in the mounting groove 4931. This setting structure is simple and the assembly efficiency is high.

[0056] As an example of the present invention, a limiting structure is provided between the base 491 and the upper cover 493, and the limiting structure includes a limiting block 4914 and a limiting notch 4933. The limiting block 4914 is located on one of the base 491 and the upper cover 493, and the limiting notch 4933 is located on the other of the base 491 and the upper cover 493. After installation, the limiting block 4914 is located in the limiting notch 4933. This setting can pre-position the installation of the assembly structure and improve the assembly efficiency; at the same time, the setting of the limiting notch 4933 can make the main body structure have a certain deformation space, which is convenient for disassembly and assembly.

[0057] Preferably, the assembly structure is arranged on the outer peripheral side of the base 491, and the assembly structure and the limiting structure are at the same height and are arranged at a distance from each other. This arrangement can ensure stable and reliable assembly and avoid uneven force; at the same time, it will not interfere with the assembly of other structures, such as the assembly structure is located on the left and right sides of the base 491, and the limiting structure is located on the front and back sides of the base 491.

[0058] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A charging device, characterized in that: The invention comprises a shell (10), wherein a heat dissipation device (4) and a heating module are arranged in the shell (10), wherein the heat dissipation device (4) is arranged adjacent to the heating module and one end of the heat dissipation device (4) away from the heating module is located outside the shell (10); the heat dissipation device (4) comprises a box (41), a heat storage plate (43), and a magnetic plate (44); the heat storage plate (43) and the magnetic plate (44) are located in the box (41) and are arranged at intervals from each other; magnetic field application modules (42) are arranged on both sides of the box (41) for periodically applying a magnetic field to and removing a magnetic field from the magnetic plate (44); and the magnetic plate (44) can periodically contact the heat storage plates (43) adjacent to the two sides alternately to conduct heat outwards to dissipate heat from the heating module.

2. The charging device according to claim 1, characterized in that: The heating module is a charging unit (2) and / or a central processing unit (3); the charging unit (2) is electrically connected to the central processing unit (3); the output end of the charging unit (2) is connected to a charging gun (3) for charging the electric vehicle.

3. The charging device according to claim 1, characterized in that: The box body (41) is made of a non-heat-conducting material and a heat-insulating layer (412) is provided on the outer surface of the box body (41).

4. The charging device according to claim 1, characterized in that: The heat storage plates (43) are rectangular thin plates and are arranged in sequence. There are a plurality of magnetic plates (44) and they are arranged at intervals from the heat storage plates (43). The heat storage plates (43) selectively contact the magnetic plates (44) on two adjacent sides by periodic rotation or reciprocating movement, or the magnetic plates (44) selectively contact the heat storage plates (43) on two adjacent sides by periodic rotation or reciprocating movement to conduct heat outward.

5. The charging device according to claim 4, characterized in that: A power unit (47) is disposed at one end of the box body (41), and an output end of the power unit (47) is drivingly connected to the magnetic plate (44) via a heat-insulating connecting rod (48), so as to drive the magnetic plate (44) to rotate in a forward or reverse direction and selectively contact one of the two adjacent heat storage plates (43).

6. The charging device according to claim 1, characterized in that: The magnetic plate (44) comprises a first end plate (441) and a second end plate (442) which are arranged opposite to each other. An assembly hole (443) is arranged between the first end plate (441) and the second end plate (442) for transmission connection with the heat-insulating connecting rod (48). The projection lengths of the first end plate (441) and the second end plate (442) on the horizontal plane are L1 and L2 respectively, wherein L1<L2.

7. The charging device according to claim 6, characterized in that: A second side wall surface (4421) and a third side wall surface (4422) are respectively provided on both sides of the second end plate (442), and the third side wall surface (4422) is provided close to the first end plate (441). The planes where the two second side wall surfaces (4421) are arranged opposite to each other form an angle α1, and the planes where the two third side wall surfaces (4422) are arranged opposite to each other form an angle α2, wherein α1<α2.

8. The charging device according to claim 7, characterized in that: The first end plate (441) comprises first side wall surfaces (4411) arranged opposite to each other, the two first side wall surfaces (4411) are both arranged vertically and the planes on which they are located form an angle α(3), wherein α1<α3<α2.

9. The charging device according to claim 1, characterized in that: The heat dissipation device (4) comprises a heat conducting plate (45), wherein the heat conducting plate (45) is located on a side of the box (41) close to the charging unit (2), and the heat conducting plate (45) is arranged parallel to the heat storage plate (43) and is arranged in close contact with the heat storage plate (43) located at one end of the box (41).

10. The charging device according to claim 9, characterized in that: The heat dissipation device (4) further comprises a heat dissipation plate (46), the heat dissipation plate (46) being arranged outside the shell (10) and located on a side of the box (41) away from the charging unit (2), and the side wall surface of the heat dissipation plate (46) being arranged in close contact with the side wall of the heat storage plate (43) located at the other end of the box (41).

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