Electrical connection assemblies and charging devices

Abstract

To provide an electrical connection assembly and charging device that effectively reduces the temperature of the charging terminals, thereby improving charging efficiency and safety. [Solution] The electrical connection assembly comprises a charging terminal having a first connection end, a power transmission component 2 including a metal busbar having a second connection end, a heat dissipation block 3, and fasteners used to fasten the first connection end, the second connection end, and the heat dissipation block together. The heat dissipation block is in thermal contact with the first connection end of the charging terminal, or simultaneously in thermal contact with the first connection end of the charging terminal and the second connection end of the power transmission component, and the heat dissipation block is in direct thermal contact with the charging terminal, quickly transferring heat from the charging terminal to the heat dissipation block and effectively lowering the temperature of the charging terminal.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the benefit of Chinese Patent Application No. CN202411931472.9, filed with the China National Intellectual Property Administration on December 25, 2024, and Chinese Patent Application No. CN202411244548.0, filed on September 5, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to an electrical connection assembly and a charging device including the electrical connection assembly.

Background Art

[0003] In the prior art, a charging dock generally includes a housing, charging terminals, and power transmission components. The charging terminals are provided in the housing, and one end of the power transmission component extends into the housing and is electrically connected to the charging terminals. In the prior art, in order to improve the charging speed, it is usually necessary to increase the charging current. When a large current flows through the charging terminals, the charging terminals are heated severely, affecting the charging efficiency and safety.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention is made to overcome or mitigate at least one aspect of the above - mentioned drawbacks.

Means for Solving the Problems

[0005] According to an aspect of the present invention, an electrical connection assembly is provided. The electrical connection assembly comprises a charging terminal having a first connection end, a power transmission component including a metal busbar having a second connection end, a heat dissipation block, and a fastener used to fasten the first connection end, the second connection end, and the heat dissipation block together. The heat dissipation block is in thermal contact with the first connection end of the charging terminal, or is in thermal contact with the first connection end of the charging terminal and the second connection end of the power transmission component simultaneously.

[0006] According to another exemplary embodiment of the present invention, the fastener includes a nut provided on or fixed to a first connection end of a charging terminal, and a bolt is threaded through the first connection end, the second connection end, and the heat dissipation block to the nut.

[0007] According to another exemplary embodiment of the present invention, a first connection hole, a second connection hole, and a third connection hole are formed in the first connection end, the second connection end, and the heat dissipation block, respectively, to allow a bolt to pass through, the second connection hole being an elongated elliptical hole whose long axis is parallel to the axial direction of the charging terminal, and the first and third connection holes being circular holes.

[0008] According to another exemplary embodiment of the present invention, a plurality of third connection holes spaced apart in the axial direction of the charging terminals are formed in the heat dissipation block, so that the mounting position of the heat dissipation block relative to the first and second connection ends can be adjusted.

[0009] According to another exemplary embodiment of the present invention, a receiving recess is formed in the heat dissipation block, and the head of a bolt is housed in the receiving recess of the heat dissipation block.

[0010] According to another exemplary embodiment of the present invention, a positioning groove is formed in the heat dissipation block, and a portion of the end of a power transmission component is positioned in the positioning groove of the heat dissipation block.

[0011] According to another exemplary embodiment of the present invention, a screw hole is formed in the heat dissipation block, a first connection hole and a second connection hole are formed in the first connection end and the second connection end, respectively, and a fastener includes a bolt which passes through the first connection hole and the second connection hole and is screwed into the screw hole of the heat dissipation block.

[0012] According to another exemplary embodiment of the present invention, the first and second connection ends are flat and each has opposing sides in the thickness direction, one side of the first connection end of the charging terminal is in electrical contact with one side of the second connection end of the power transmission component, and the heat dissipation block is in thermal contact with the other side of the first connection end of the charging terminal, or is in thermal contact with the other side of the first connection end of the charging terminal and the other side of the second connection end of the power transmission component simultaneously.

[0013] According to another exemplary embodiment of the present invention, the heat dissipation block has a flat contact surface, and the contact surface of the heat dissipation block is attached to the surface of a first connection end or a second connection end.

[0014] According to another exemplary embodiment of the present invention, the power transmission component further includes an outer insulating layer wrapped around a metal busbar, the second connection end of the metal busbar being exposed from the outer insulating layer.

[0015] According to another exemplary embodiment of the present invention, a black heat dissipation film is formed on the surface of a heat dissipation block to improve the thermal emissivity and heat dissipation efficiency of the heat dissipation block.

[0016] According to another exemplary embodiment of the present invention, the heat dissipation film is a black oxide film formed by anodizing the surface of the heat dissipation block, or the heat dissipation film is a black coating formed by surface spraying of the heat dissipation block.

[0017] According to another aspect of the present invention, an electrical connection assembly is provided. The electrical connection assembly comprises a charging terminal, a power transmission component electrically connected to the charging terminal, and a heat dissipation block thermally in contact with the charging terminal. A black heat dissipation film is formed on the surface of the heat dissipation block to improve the heat emissivity and heat dissipation efficiency of the heat dissipation block.

[0018] According to an exemplary embodiment of the present invention, the heat dissipation film is a black oxide film formed by anodizing the surface of the heat dissipation block, or the heat dissipation film is a black coating formed by surface spraying of the heat dissipation block.

[0019] According to another aspect of the present invention, a charging device is provided. The charging device comprises a housing and the above-mentioned electrical connection assembly mounted in the housing. Charging terminals and a heat dissipation block are located in the housing, and power transmission components are led out from a rear port of the housing.

[0020] According to another exemplary embodiment of the present invention, the housing includes a front housing and a rear housing assembled to face each other axially in the direction of the charging terminals, with terminal insertion holes formed in the front housing, the charging terminals having first connecting ends and mating ends opposite each other axially, the mating ends of the charging terminals being inserted into the terminal insertion holes to mate into the inserted mating charging terminals, the first connecting ends of the charging terminals, the second connecting ends of the power transmission components, and the heat dissipation block being housed in an internal cavity of the rear housing.

[0021] According to another exemplary embodiment of the present invention, a mounting opening is formed in the upper wall of the rear housing to allow bolts to enter, so that the first connecting end, the second connecting end, and the heat dissipation block can be fastened together by bolts entering through the mounting opening.

[0022] According to another exemplary embodiment of the present invention, the charging device further comprises a sealing plug that is inserted into a mounting opening in the rear housing and seals the mounting opening.

[0023] According to another exemplary embodiment of the present invention, the charging device includes two electrical connection assemblies arranged side by side, and two mounting ports corresponding to the bolts of the two electrical connection assemblies are formed on the upper wall of the rear housing, and the charging device includes two seal plugs respectively inserted into the two mounting ports.

[0024] According to another exemplary embodiment of the present invention, a first protrusion is formed outside the rear end of the front housing, and a first slot is formed outside the front end of the rear housing, and the first slot engages with the first protrusion to lock the front housing and the rear housing to each other.

[0025] According to another exemplary embodiment of the present invention, the charging device further includes a seal element mounted on the rear port of the rear housing to seal the rear port of the rear housing, and a through hole is formed in the seal element to allow the power transmission element to pass through, and the power transmission element is press-fitted into the wall of the through hole of the seal element to achieve a seal between the power transmission element and the wall.

[0026] According to another exemplary embodiment of the present invention, the housing further includes a rear end cover mounted on the rear port of the rear housing, and the power transmission components are led out from the housing through the through holes of the rear end cover.

[0027] According to another exemplary embodiment of the present invention, a second protrusion is formed outside the peripheral wall of the rear port of the rear housing, and a second slot is formed in the rear end cover, and the second slot engages with the second protrusion to lock the rear end cover to the rear housing.

[0028] According to another exemplary embodiment of the present invention, the charging device is a charging dock or a charging gun.

[0029] In the above exemplary embodiment of the present invention, the fastener is used to fasten the charging terminal, the power transmission component, and the heat dissipation block together. The heat dissipation block makes direct thermal contact with the connection end of the charging terminal or power transmission component, allowing heat from the charging terminal to be quickly transferred to the heat dissipation block, thereby effectively lowering the temperature of the charging terminal and improving charging efficiency and safety.

[0030] In the above exemplary embodiment of the present invention, the heat dissipation block not only absorbs a large amount of heat but also has a large heat dissipation area and a high thermal emissivity coefficient. The heat dissipation block can rapidly dissipate the absorbed heat by thermal convection and thermal radiation, effectively avoiding a large temperature rise of the charging terminals during the charging process and improving charging efficiency and safety.

[0031] The above and other features of the present invention will become clearer by describing exemplary embodiments of the present invention in detail with reference to the attached drawings. [Brief explanation of the drawing]

[0032] [Figure 1] This is a descriptive perspective view of a charging dock according to an exemplary embodiment of the present invention. [Figure 2] This is an exploded view illustrating a charging dock according to an exemplary embodiment of the present invention. [Figure 3] This is another explanatory exploded view of a charging dock according to an exemplary embodiment of the present invention. [Figure 4] This is another explanatory exploded view of a charging dock according to an exemplary embodiment of the present invention. [Figure 5] This is a descriptive perspective view of an electrical connection assembly of a charging dock according to an exemplary embodiment of the present invention. [Figure 6] This is an axial diagram illustrating an electrical connection assembly of a charging dock according to an exemplary embodiment of the present invention. [Figure 7] This is an exploded view illustrating an electrical connection assembly of a charging dock according to an exemplary embodiment of the present invention. [Figure 8]This is a descriptive perspective view of a heat dissipation block for an electrical connection assembly of a charging dock according to an exemplary embodiment of the present invention. [Figure 9] This is a cross-sectional view of a heat dissipation block of an electrical connection assembly in a charging dock according to an exemplary embodiment of the present invention. [Figure 10] This is an enlarged view of the explanatory portion of area A in Figure 9. [Modes for carrying out the invention]

[0033] Illustrative embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, the same reference numerals refer to the same elements. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so as to make the present disclosure thorough and complete and so as to fully convey the concepts of the present disclosure to those skilled in the art.

[0034] The following detailed description includes numerous specific details for illustrative purposes to provide a thorough understanding of the disclosed embodiments. However, it will be apparent that one or more embodiments can be carried out without these specific details. In other examples, well-known structures and devices are shown schematically for the sake of simplifying the drawings.

[0035] According to the general concept of the present invention, an electrical connection assembly is provided. The electrical connection assembly comprises a charging terminal having a first connection end, a power transmission component including a metal busbar having a second connection end, a heat sink block, and fasteners used to fasten the first connection end, the second connection end, and the heat sink block together. The heat sink block is in thermal contact with the first connection end of the charging terminal, or is in thermal contact with the first connection end of the charging terminal and the second connection end of the power transmission component simultaneously.

[0036] According to another general concept of the present invention, an electrical connection assembly is provided. The electrical connection assembly comprises a charging terminal, a power transmission component electrically connected to the charging terminal, and a heat dissipation block thermally in contact with the charging terminal. A black heat dissipation film is formed on the surface of the heat dissipation block to improve the heat emissivity and heat dissipation efficiency of the heat dissipation block.

[0037] According to another general concept of the present invention, a charging device is provided. The charging device comprises a housing and the above-mentioned electrical connection assembly mounted in the housing. Charging terminals and a heat dissipation block are located in the housing, and power transmission components are led out from a rear port of the housing.

[0038] Figure 1 shows an explanatory perspective view of a charging dock according to an exemplary embodiment of the present invention. Figure 2 shows an explanatory exploded view of a charging dock according to an exemplary embodiment of the present invention. Figure 3 shows another explanatory exploded view of a charging dock according to an exemplary embodiment of the present invention. Figure 4 shows another explanatory exploded view of a charging dock according to an exemplary embodiment of the present invention. Figure 5 shows an explanatory perspective view of the electrical connection assembly 100 of the charging dock according to an exemplary embodiment of the present invention. Figure 6 shows an axial explanatory view of the electrical connection assembly 100 of the charging dock according to an exemplary embodiment of the present invention. Figure 7 shows an exploded view of the electrical connection assembly 100 of a charging dock according to an exemplary embodiment of the present invention. Figure 8 shows an explanatory perspective view of the heat dissipation block 3 of the electrical connection assembly 100 of a charging dock according to an exemplary embodiment of the present invention. Figure 9 shows a cross-sectional view of the heat dissipation block 3 of the electrical connection assembly of a charging dock according to an exemplary embodiment of the present invention. Figure 10 shows an explanatory enlarged portion of area A in Figure 9.

[0039] As shown in Figures 1 to 10, an exemplary embodiment of the present invention discloses an electrical connection assembly. The electrical connection assembly comprises a charging terminal 1, a power transmission component 2, a heat dissipation block 3, and a fastener 5. The charging terminal 1 has a first connection end 10. The power transmission component 2 includes a metal busbar 21 having a second connection end 20. The fastener 5 fastens the first connection end 10 of the charging terminal 1, the second connection end 20 of the power transmission component 2, and the heat dissipation block 3 together. The heat dissipation block 3 is either in thermal contact with the first connection end 10 of the charging terminal 1, or is in thermal contact with the first connection end 10 of the charging terminal 1 and the second connection end 20 of the power transmission component 2 simultaneously.

[0040] As shown in Figures 1 to 10, in the illustrated embodiment, the fastener 5 includes a nut 52 and a bolt 51. The nut 52 is provided on or fixed to the first connection end 10 of the charging terminal 1. The bolt 51 passes through the first connection end 10, the second connection end 20, and the heat dissipation block 3 and is screwed to the nut 52. In the illustrated embodiment, the nut 52 can be riveted or welded to the first connection end 10 of the charging terminal 1.

[0041] As shown in Figures 1 to 10, in the illustrated embodiment, a first connection hole 101, a second connection hole 201, and a third connection hole 301 are formed in the first connection end 10, the second connection end 20, and the heat dissipation block 3, respectively, to allow a bolt 51 to pass through. The second connection hole 201 is an elongated elliptical hole whose long axis is parallel to the axial direction of the charging terminal 1, while the first connection hole 101 and the third connection hole 301 are circular holes. In the illustrated embodiment, the elongated elliptical shape of the second connection hole 201 allows the bolt 51 to move along the axial direction of the charging terminal 1 within the second connection hole 201, thereby absorbing certain mounting and manufacturing errors.

[0042] As shown in Figures 1 to 10, in the illustrated embodiment, a plurality of third connection holes 301 spaced apart in the axial direction of the charging terminal 1 are formed in the heat dissipation block 3, and therefore the mounting position of the heat dissipation block 3 relative to the first connection end 10 and the second connection end 20 can be adjusted.

[0043] As shown in Figures 1 to 10, in the illustrated embodiment, a receiving recess 31 is formed in the heat dissipation block 3, and the head 51 of the bolt 51 is received in the receiving recess 31 of the heat dissipation block 3.

[0044] As shown in Figures 1 to 10, in the illustrated embodiment, a positioning groove 302 is formed in the heat dissipation block 3, and a portion of the end of the power transmission component 2 is positioned in the positioning groove 302 of the heat dissipation block 3.

[0045] The present invention is not limited to the illustrated embodiments. For example, in another exemplary embodiment of the present invention, threaded holes (not shown) are formed in the heat dissipation block 3, and a first connection hole 101 and a second connection hole 201 are formed in the first connection end 10 and the second connection end 20, respectively. The fastener 5 includes a bolt 51 which passes through the first connection hole 101 and the second connection hole 201 and is screwed into the threaded holes of the heat dissipation block 3.

[0046] As shown in Figures 1 to 10, in the illustrated embodiment, the first connection end 10 and the second connection end 20 are flat and have opposing sides in the thickness direction. One side of the first connection end 10 of the charging terminal 1 is in electrical contact with one side of the second connection end 20 of the power transmission component 2. The heat dissipation block 3 is in thermal contact with the other side of the first connection end 10 of the charging terminal 1, or is in thermal contact with the other side of the first connection end 10 of the charging terminal 1 and the other side of the second connection end 20 of the power transmission component 2 simultaneously.

[0047] As shown in Figures 1 to 10, in the illustrated embodiment, the heat dissipation block 3 has a flat contact surface 30. The contact surface 30 of the heat dissipation block 3 is pressed against the surface of the first connection end 10 or the second connection end 20.

[0048] As shown in Figures 1 to 10, in the illustrated embodiment, the power transmission component 2 further includes an outer insulating layer 22 wrapped around a metal busbar 21, and the second connection end 20 of the metal busbar 21 is exposed from the outer insulating layer 22.

[0049] However, the present invention is not limited to the illustrated embodiments. For example, in another exemplary embodiment of the present invention, the power transmission component 2 includes a cable and a connection terminal electrically connected to one end of the conductor core of the cable, the one end of the connection terminal may function as a second connection end 20.

[0050] As shown in Figures 1 to 10, in the illustrated embodiment, a black heat dissipation film 3a is formed on the surface of the heat dissipation block 3 to improve the thermal emissivity coefficient and heat dissipation efficiency of the heat dissipation block 3.

[0051] As shown in Figures 1 to 10, in exemplary embodiments of the present invention, the heat dissipation film 3a may be a black oxide film formed by anodizing the surface of the heat dissipation block 3.

[0052] As shown in Figures 1 to 10, in another exemplary embodiment of the present invention, the heat dissipation film 3a may be a black coating formed by surface spraying of the heat dissipation block 3.

[0053] As shown in Figures 1 to 10, an electrical connection assembly is also disclosed in another exemplary embodiment of the present invention. The electrical connection assembly comprises a charging terminal 1, a power transmission component 2, and a heat dissipation block 3. The power transmission component 2 is electrically connected to the charging terminal 1. The heat dissipation block 3 is in thermal contact with the charging terminal 1. A black heat dissipation film 3a is formed on the surface of the heat dissipation block 3 to improve the thermal emissivity and heat dissipation efficiency of the heat dissipation block 3.

[0054] As shown in Figures 1 to 10, a charging device is also disclosed in another exemplary embodiment of the present invention. The charging device comprises a housing 4 and an electrical connection assembly 100. The electrical connection assembly 100 is mounted in the housing 4. The second connection end 20 of the power transmission component 2, the charging terminal 1, and the heat dissipation block 3 are located in the housing 4, and the power transmission component 2 is led out from a rear port 402 of the housing 4.

[0055] As shown in Figures 1 to 10, in the illustrated embodiment, the housing 4 includes a front housing 41 and a rear housing 42 assembled together, facing each other axially in the direction of the charging terminal 1, with a terminal insertion hole 401 formed in the front housing 41. The charging terminal 1 has a first connecting end 10 and a mating end 11 opposite each other axially. The mating end 11 of the charging terminal 1 is inserted into the terminal insertion hole 401 to mate into an inserted mating charging terminal (not shown). The first connecting end 10 of the charging terminal 1, the second connecting end 20 of the power transmission component 2, and the heat dissipation block 3 are housed in the internal cavity of the rear housing 42.

[0056] As shown in Figures 1 to 10, in the illustrated embodiment, a mounting opening 403 is formed in the upper wall of the rear housing 42 so as to allow a bolt 51 to enter, and thus the first connecting end 10, the second connecting end 20, and the heat dissipation block 3 can be fastened together by a bolt 51 entering through the mounting opening 403.

[0057] As shown in Figures 1 to 10, in the illustrated embodiment, the charging device further comprises a sealing plug 7 which is inserted into the mounting opening 403 of the rear housing 42 and seals the mounting opening 403.

[0058] As shown in Figures 1 to 10, in the illustrated embodiment, the charging device comprises two side-by-side electrical connection assemblies 100, with two mounting holes 403 corresponding to the bolts 51 of the two electrical connection assemblies 100 formed in the upper wall of the rear housing 42. The charging device comprises two sealing plugs 7, each inserted into one of the two mounting holes 403.

[0059] As shown in Figures 1 to 10, in the illustrated embodiment, a first projection 41a is formed on the outside of the rear end of the front housing 41, and a first slot 42a is formed on the outside of the front end of the rear housing 42. The first slot 42a engages with the first projection 41a to lock the front housing 41 and the rear housing 42 together.

[0060] As shown in Figures 1 to 10, in the illustrated embodiment, the charging device further comprises a sealing element 6 fitted to the rear port 402 of the rear housing 42 to seal the rear port 402. A through hole 6a is formed in the sealing element 6 to allow the power transmission component 2 to pass through, and the hole wall of the through hole 6a of the sealing element 6 tightly fits onto the power transmission component 2 to achieve a seal between the power transmission component 2 and the hole wall.

[0061] As shown in Figures 1 to 10, in the illustrated embodiment, the housing 4 further includes a rear end cover 43 fitted to the rear port 402 of the rear housing 42. The power transmission component 2 is routed out of the housing 4 through a through hole in the rear end cover 43.

[0062] As shown in Figures 1 to 10, in the illustrated embodiment, a second projection 42b is formed on the outside of the peripheral wall of the rear port 402 of the rear housing 42, and a second slot 41b is formed in the rear end cover 43, and the second slot 41b engages with the second projection 42b to lock the rear end cover 43 to the rear housing 42.

[0063] As shown in Figures 1 to 10, in the illustrated embodiments, the charging device may be a charging dock or a charging gun.

[0064] The temperature rise of a charging device with an anodized surface on the heat dissipation block 3 and the temperature rise of a charging device with an anodized surface on the heat dissipation block 3 will be compared under identical experimental conditions.

[0065] First experimental example Table 1 shows the temperature rise of a charging device with a heat dissipation block surface that has not been anodized, and Table 2 shows the temperature rise of a charging device with a heat dissipation block surface that has been anodized.

[0066] [Table 1]

[0067] [Table 2]

[0068] Of these, the sign "+" represents the positive terminal, and the sign "-" represents the negative terminal. For example, "terminal +" represents the positive charging terminal, and "terminal -" represents the negative charging terminal. According to Tables 1 and 2, it is clear that the charging device with anodized surface of heat dissipation block 3 has better heat dissipation performance and lower temperature rise.

[0069] Second experimental example Table 3 shows the temperature rise of the charging device on the surface of the heat dissipation block without anodizing treatment, and Table 4 shows the temperature rise of the charging device on the surface of the heat dissipation block 3 after anodizing treatment.

[0070] [Table 3]

[0071] [Table 4]

[0072] Of these, the sign "+" represents the positive terminal, and the sign "-" represents the negative terminal. For example, "terminal +" represents the positive charging terminal, and "terminal -" represents the negative charging terminal. According to Tables 3 and 4, it is clear that the charging device with anodized surface of heat dissipation block 3 has better heat dissipation performance and lower temperature rise.

[0073] Those skilled in the art should understand that the embodiments described above are illustrative and not limiting. For example, those skilled in the art can make many modifications to the embodiments described above without structural or principle contradictions, and can freely combine the various features described in different embodiments.

[0074] While several exemplary embodiments have been illustrated and described, it will be understood by those skilled in the art that various modifications or changes can be made to these embodiments without departing from the principles and spirit of this disclosure. The scope of this disclosure is defined in the claims and its equivalents.

[0075] When used herein, elements described in the singular form and preceded by the word "a" or "an" should be understood not to exclude the plural forms of such elements or steps unless it is explicitly stated that such exclusion is to be excluded. Furthermore, references to “one embodiment” of the present invention are not intended to be construed as excluding the existence of additional embodiments that likewise incorporate the described features. Moreover, unless it is expressly stated otherwise, embodiments that “compile” or “have” one or more elements having a particular characteristic may include additional such elements that do not possess that characteristic.

Claims

1. An electrical connection assembly, A charging terminal (1) having a first connection end (10), A power transmission component (2) includes a metal busbar (21) having a second connecting end (20), Heat dissipation block (3), A fastener (5) used to fasten the first connecting end (10), the second connecting end (20), and the heat dissipation block (3) together Equipped with, An electrical connection assembly in which the heat dissipation block (3) is in thermal contact with the first connection end (10) of the charging terminal (1), or is in thermal contact with the first connection end (10) of the charging terminal (1) and the second connection end (20) of the power transmission component (2) simultaneously.

2. The fastener (5) includes a nut (52) provided on or fixed to the first connecting end (10) of the charging terminal (1), The electrical connection assembly according to claim 1, wherein a bolt (51) passes through the first connection end (10), the second connection end (20), and the heat dissipation block (3) and is screwed to the nut (52).

3. A first connection hole (101), a second connection hole (201), and a third connection hole (301) are formed in the first connection end (10), the second connection end (20), and the heat dissipation block (3), respectively, to allow the bolt (51) to pass through. The electrical connection assembly according to claim 2, wherein the second connection hole (201) is an elongated elliptical hole whose long axis is parallel to the axial direction of the charging terminal (1), and the first connection hole (101) and the third connection hole (301) are circular holes.

4. The electrical connection assembly according to claim 3, wherein a plurality of third connection holes (301) spaced apart in the axial direction of the charging terminal (1) are formed in the heat dissipation block (3), and therefore the mounting position of the heat dissipation block (3) relative to the first connection end (10) and the second connection end (20) can be adjusted.

5. The electrical connection assembly according to claim 2, wherein a receiving recess (31) is formed in the heat dissipation block (3), and the head (11a) of the bolt (51) is housed in the receiving recess (31) of the heat dissipation block (3).

6. The electrical connection assembly according to claim 2, wherein a positioning groove (302) is formed in the heat dissipation block (3), and a portion of the end of the power transmission component (2) is positioned in the positioning groove (302) of the heat dissipation block (3).

7. A screw hole is formed in the heat dissipation block (3), and a first connection hole (101) and a second connection hole (201) are formed in the first connection end (10) and the second connection end (20), respectively. The electrical connection assembly according to claim 1, wherein the fastener (5) includes a bolt (51), the bolt (51) passing through the first connection hole (101) and the second connection hole (201) and screwed into the threaded hole of the heat dissipation block (3).

8. The first connection end (10) and the second connection end (20) are flat and each has sides facing each other in the thickness direction, and one side of the first connection end (10) of the charging terminal (1) is in electrical contact with one side of the second connection end (20) of the power transmission component (2). The electrical connection assembly according to claim 1, wherein the heat dissipation block (3) is in thermal contact with the other side surface of the first connection end (10) of the charging terminal (1), or is in thermal contact with the other side surface of the first connection end (10) of the charging terminal (1) and the other side surface of the second connection end (20) of the power transmission component (2) simultaneously.

9. The electrical connection assembly according to claim 1, wherein the heat dissipation block (3) has a flat contact surface (30), and the contact surface (30) of the heat dissipation block (3) is attached to the surface of the first connection end (10) or the second connection end (20).

10. The electrical connection assembly according to claim 1, wherein the power transmission component (2) further includes an outer insulating layer (22) wrapped around the metal busbar (21), and the second connection end (20) of the metal busbar (21) is exposed from the outer insulating layer (22).

11. The electrical connection assembly according to any one of claims 1 to 10, wherein a black heat dissipation film (3a) is formed on the surface of the heat dissipation block (3) to improve the heat emissivity coefficient and heat dissipation efficiency of the heat dissipation block (3).

12. The heat dissipation film (3a) is either a black oxide film formed by anodizing the surface of the heat dissipation block (3), or The electrical connection assembly according to claim 11, wherein the heat dissipation film (3a) is a black coating formed by surface spraying of the heat dissipation block (3).

13. An electrical connection assembly, Charging terminal (1), A power transmission component (2) electrically connected to the charging terminal (1), The heat dissipation block (3) is in thermal contact with the charging terminal (1) and Equipped with, An electrical connection assembly in which a black heat dissipation film (3a) is formed on the surface of the heat dissipation block (3) to improve the heat emissivity coefficient and heat dissipation efficiency of the heat dissipation block (3).

14. The heat dissipation film (3a) is either a black oxide film formed by anodizing the surface of the heat dissipation block (3), or The electrical connection assembly according to claim 13, wherein the heat dissipation film (3a) is a black coating formed by surface spraying of the heat dissipation block (3).

15. It is a charging device, Housing (4) and The electrical connection assembly (100) according to any one of claims 1 to 14 is mounted on the housing (4) and Equipped with, A charging device in which the charging terminal (1) and the heat dissipation block (3) are arranged in the housing (4), and the power transmission component (2) is led out from the rear port (402) of the housing (4).

16. The housing (4) includes a front housing (41) and a rear housing (42) assembled to face each other in the axial direction of the charging terminal (1), and a terminal insertion hole (401) is formed in the front housing (41). The charging terminal (1) has a first connecting end (10) and a mating end (11) opposite to each other in the axial direction, and the mating end (11) of the charging terminal (1) is inserted into the terminal insertion hole (401) in order to mate into the mating charging terminal that is inserted into it. The charging device according to claim 15, wherein the first connection end (10) of the charging terminal (1), the second connection end (20) of the power transmission component (2), and the heat dissipation block (3) are housed in the internal cavity of the rear housing (42).

17. The charging device according to claim 16, wherein a mounting opening (403) is formed in the upper wall of the rear housing (42) to allow a bolt (51) to enter, and so the first connecting end (10), the second connecting end (20), and the heat dissipation block (3) can be fastened together by the bolt (51) entering through the mounting opening (403).

18. The charging device according to claim 17, further comprising a seal plug (7) inserted into the mounting port (403) of the rear housing (42) to seal the mounting port (403).

19. The charging device according to claim 18, comprising two side-by-side electrical connection assemblies (100), two mounting holes (403) corresponding to bolts (51) of the two electrical connection assemblies (100) formed in the upper wall of the rear housing (42), and the charging device comprising two seal plugs (7) inserted into the two mounting holes (403), respectively.

20. The charging device according to claim 16, wherein a first projection (41a) is formed on the outside of the rear end of the front housing (41), and a first slot (42a) is formed on the outside of the front end of the rear housing (42), and the first slot (42a) engages with the first projection (41a) to lock the front housing (41) and the rear housing (42) together.

21. The rear housing (42) further comprises a sealing element (6) attached to the rear port (402) to seal the rear port (402), A charging device according to claim 16, wherein a through hole (6a) is formed in the sealing element (6) to allow the power transmission element (2) to pass through, and the power transmission element (2) is tightly fitted into the wall of the through hole (6a) of the sealing element (6) to achieve a seal between the power transmission element (2) and the wall.

22. The charging device according to claim 21, wherein the housing (4) further includes a rear end cover (43) fitted to the rear port (402) of the rear housing (42), and the power transmission component (2) is led out from the housing (4) through a through hole in the rear end cover (43).

23. The charging device according to claim 22, wherein a second projection (42b) is formed on the outside of the peripheral wall of the rear port (402) of the rear housing (42), a second slot (41b) is formed in the rear end cover (43), the second slot (41b) engages with the second projection (42b) to lock the rear end cover (43) to the rear housing (42).

24. The charging device according to any one of claims 15 to 23, wherein the charging device is a charging dock or a charging gun.

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