A heat dissipation structure of a charging gun

Abstract

The utility model discloses a heat dissipation structure of charging gun, including pin and heat exchange kettle, the heat exchange kettle includes cooling shell and the hollow flow channel of inside communication with liquid inlet pipe and liquid outlet pipe, the tail of pin is through the heat conduction plane and cooling shell and is pasted and is connected, and the pasting surface is equipped with heat conduction coating. The utility model discloses pin through heat conduction plane and the cooling shell of good heat conduction effect and is pasted, and sets up heat conduction coating, and combines the hollow flow channel of circulating cooling liquid, and the heat dissipation area is big, and the heat conduction efficiency is high, simultaneously does not influence electrical performance, can synergic promotion pin's heat dissipation efficiency, and the temperature of pin is reduced fast, and the charging efficiency of new energy automobile is improved.

Description

Technical Field

[0001] This utility model relates to a heat dissipation structure for a charging gun, belonging to the technical field of electric vehicle charging equipment. Background Technology

[0002] During charging, the DC+ and DC- pins of the liquid-cooled DC charging gun will continuously generate heat. The tail of the pins is encased in a hollow plastic structure, called the water channel casing. Figure 1 As shown, coolant enters the hollow flow channel of the water circuit housing through the inlet pipe, and then flows out through the outlet pipe to the cooling equipment. After being cooled, the coolant flows back into the water circuit housing, and the cycle continues. During this process, the heat from the pins is transferred to the water circuit housing through heat conduction, and then from the water circuit housing to the coolant, thus achieving the purpose of dissipating heat from the pins.

[0003] The DC charging gun conducts current to the new energy vehicle battery through metal pins. Since the pins are charged and the coolant is composed of water and ethylene glycol, the material of the water channel casing must be insulating; otherwise, the conductivity between the pins and the coolant would compromise the DC charging gun's insulation performance. In existing technologies, the water channel casing is typically made of plastic, but plastic has a thermal conductivity of only 0.5 W / (m*K), resulting in low heat dissipation efficiency of the pins and consequently, low charging efficiency of the DC charging gun. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heat dissipation structure for a charging gun, thereby improving the heat dissipation efficiency of the pins and thus improving the charging efficiency of the liquid-cooled DC gun.

[0005] To achieve the above objectives, this utility model employs the following technical solution: This utility model provides a heat dissipation structure for a charging gun, including a pin and a heat exchange vessel. The heat exchange vessel includes a cooling shell and a hollow flow channel inside that communicates with an inlet pipe and an outlet pipe. The tail of the pin is attached to the cooling shell through a heat-conducting plane, and the attachment surface is provided with a heat-conducting coating.

[0006] The pins are bonded to a thermally conductive cooling shell via a thermally conductive plane, and a thermally conductive coating is applied. Combined with hollow flow channels, this synergistically improves the heat dissipation efficiency of the pins. The cooling shell not only has excellent insulation properties but also boasts a thermal conductivity of up to 25 W / (m*k), which is 50 times higher than that of traditional plastics.

[0007] Furthermore, the pins include a DC+ pin and a DC- pin, which are respectively connected to a heat exchanger.

[0008] Furthermore, the heat-conducting plane and the cooling housing are respectively provided with connection holes, and are fixedly connected by fasteners passing through the connection holes.

[0009] Furthermore, the connecting holes on the heat-conducting plane are threaded holes, the connecting holes on the cooling housing are U-shaped through holes, and the fasteners are bolts or screws.

[0010] Furthermore, the pin is a copper pin, the heat-conducting plane is a rectangular copper plate, and the heat-conducting coating is a thermal grease layer.

[0011] Furthermore, the tail end of the heat-conducting plane is provided with a welding groove for connecting cables, which increases the heat dissipation area of ​​the pin without affecting the electrical performance.

[0012] Furthermore, a water nozzle is connected to the cooling housing, with one end of the water nozzle connected to the hollow flow channel and the other end connected to the liquid inlet pipe or liquid outlet pipe.

[0013] Furthermore, the water nozzle is connected to the cooling housing via threads, and a sealing ring is provided at the connection point.

[0014] Furthermore, the cooling housing includes an upper shell and a lower shell, the upper shell is bonded and fixed to the lower shell, and the heat-conducting plane and the water nozzle are both connected to the lower shell.

[0015] Furthermore, the hollow flow channel is a serpentine or spiral meandering flow channel, which increases the contact area of ​​the coolant and improves the heat dissipation effect.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The heat dissipation structure of this utility model attaches the pin to the cooling shell with good thermal conductivity through a thermally conductive plane and is provided with a thermally conductive coating. Combined with the hollow flow channel for circulating coolant, it has a large heat dissipation area and high thermal conductivity, while not affecting electrical performance. It can synergistically improve the heat dissipation efficiency of the pin, quickly reduce the temperature of the pin, and improve the charging efficiency of new energy vehicles. Attached Figure Description

[0017] Figure 1 It is the heat dissipation structure of the charging gun in the existing technology; Figure 2 This is a schematic diagram of the heat dissipation structure of a liquid-cooled DC charging gun provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the pin structure described in the embodiment; Figure 4 This is a schematic diagram of the external structure of the heat exchange vessel described in the embodiment; Figure 5 This is a schematic diagram of the assembly structure of the heat exchange vessel described in the embodiment.

[0018] In the diagram: 1. Pin; 11. DC+ pin; 12. DC- pin; 13. Heat-conducting plane; 131. Threaded hole; 132. Welding groove; 2. Heat exchange vessel; 21. Cooling shell; 211. U-shaped through hole; 212. Upper shell; 213. Lower shell; 22. Hollow flow channel; 23. Water nozzle; 24. Sealing ring; 3. Liquid inlet pipe; 4. Liquid outlet pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0020] Example 1 This embodiment provides a heat dissipation structure for a liquid-cooled DC charging gun, such as... Figure 2 As shown, it includes a pin 1 and a heat exchange vessel 2. The heat exchange vessel 2 includes a cooling shell 21 and a hollow flow channel 22 inside which is connected to the liquid inlet pipe 3 and the liquid outlet pipe 4. The tail of the pin 1 is attached to and fixedly connected to the cooling shell 21 through a heat-conducting plane 13. The contact surface is provided with a heat-conducting coating.

[0021] In this embodiment, the pin 1 includes a DC+ pin 11 and a DC- pin 12, and the DC+ pin 11 and DC- pin 12 are respectively connected to a heat exchanger 2.

[0022] In this embodiment, as Figure 3 As shown, the heat-conducting plane 13 has a threaded hole 131, which corresponds to the connection hole on the cooling housing 21, for bolts to pass through and fix the connection. The tail of the heat-conducting plane 13 has a welding groove 132 for connecting cables.

[0023] In this embodiment, as Figure 4 and Figure 5 As shown, the cooling outer shell 21 includes an upper shell 212 and a lower shell 213. The upper shell 212 is bonded and fixed to the lower shell 213. The heat-conducting plane 13 is attached to and connected to the outer wall of the lower shell 213. The hollow flow channel 22 is a serpentine flow channel. A water nozzle 23 is threaded onto the lower shell 213. One end of the water nozzle 23 is connected to the hollow flow channel 22, and the other end is connected to the liquid inlet pipe 3 or the liquid outlet pipe 4.

[0024] In this embodiment, the heat dissipation structure allows coolant to flow into the hollow flow channel 22 inside the heat exchange vessel 2 via the inlet pipe 3, and then into the cooling device via the outlet pipe 4. After cooling, the coolant flows back into the heat exchange vessel 2, and this process repeats. The heat from the pin 1 is conducted to the cooling shell 21 of the heat exchange vessel 2 via the heat-conducting plane 13 and the heat-conducting coating, and then to the coolant, thus achieving the purpose of cooling the pin 1.

[0025] Example 2 This embodiment provides a heat dissipation structure for a liquid-cooled DC charging gun, which is further optimized based on Embodiment 1 to achieve better technical results. For details not described in this embodiment, please refer to Embodiment 1.

[0026] In this embodiment, the pin 1 is a copper pin, the heat-conducting plane 13 is a rectangular copper plate, and the heat-conducting coating is a thermal grease layer.

[0027] In this embodiment, the connecting hole on the cooling housing 21 is set as a U-shaped through hole 211, which has low processing cost and takes less time; the fastener passing through the threaded hole 131 and the U-shaped through hole 211 is a screw.

[0028] In this embodiment, the hollow flow channel 22 is a spiral meandering flow channel, which increases the contact area of ​​the coolant and improves the heat dissipation effect.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" (if any) indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A heat dissipation structure for a charging gun, characterized in that, It includes a pin (1) and a heat exchange vessel (2). The heat exchange vessel (2) includes a cooling shell (21) and a hollow flow channel (22) inside which is connected to the liquid inlet pipe (3) and the liquid outlet pipe (4). The pin (1) is fitted and connected to the cooling shell (21).

2. The heat dissipation structure of the charging gun according to claim 1, characterized in that, The pin (1) includes a DC+ pin (11) and a DC- pin (12), which are respectively connected to a heat exchanger (2).

3. The heat dissipation structure of the charging gun according to claim 1, characterized in that, The tail of the pin (1) is provided with a heat-conducting surface (13), and the heat-conducting surface (13) and the cooling shell (21) are respectively provided with connection holes, and are fixedly connected by fasteners passing through the connection holes.

4. The heat dissipation structure of the charging gun according to claim 3, characterized in that, The tail end of the heat-conducting plane (13) is provided with a welding groove (132) for connecting cables.

5. The heat dissipation structure of the charging gun according to claim 3, characterized in that, A water nozzle (23) is connected to the cooling shell (21). One end of the water nozzle (23) is connected to the hollow flow channel (22), and the other end is connected to the liquid inlet pipe (3) or the liquid outlet pipe (4).

6. The heat dissipation structure of the charging gun according to claim 5, characterized in that, The water nozzle (23) is connected to the cooling housing (21) by threads, and a sealing ring (24) is provided at the connection.

7. The heat dissipation structure of the charging gun according to claim 6, characterized in that, The cooling housing (21) includes an upper shell (212) and a lower shell (213). The upper shell (212) is bonded and fixed to the lower shell (213). The heat-conducting plane (13) and the water nozzle (23) are both connected to the lower shell (213).

8. The heat dissipation structure of the charging gun according to claim 1, characterized in that, The hollow flow channel (22) is a serpentine or spiral meandering flow channel.

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