Charging terminals and charging devices

Abstract

This invention discloses a charging terminal and a charging device. [Solution] The charging terminal comprises a cylindrical mating portion 11 used for mating with a columnar mating terminal, and a welded portion 12 used for welding to a cable for electrical connection. The mating portion 11 is a single stamped part, and the welded portion 12 is a single cold-formed part, with the front end of the welded portion 12 welded, riveted, or crimped to the rear end of the mating portion 11. In this invention, since at least a part of the charging terminal is a cold-formed part, not only is the manufacturing cost low, but it can also carry a large charging current.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the benefit of Chinese Patent Application No. CN202422880084.4, filed with the China National Intellectual Property Administration on November 25, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a charging terminal and a charging device including the charging terminal.

Background Art

[0003] In the prior art, the charging terminals of charging docks used in electric vehicles are usually integral machined parts. Although the current capacity of machined terminals is high, the manufacturing cost is high, and machined terminals do not have a competitive advantage. To reduce costs, in the prior art, punched charging terminals are generally used, but the current capacity of punched charging terminals is low. However, to shorten the charging time, the charging current of electric vehicles is increasing, and the maximum charging current has reached 1000 A. Existing punched charging terminals cannot meet this requirement.

Summary of the Invention

Problems to be Solved by the Invention

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

Means for Solving the Problems

[0005] According to one aspect of the present invention, a charging terminal is provided. The charging terminal includes a cylindrical fitting portion used for fitting with a columnar mating terminal, and a welding portion used for welding to a cable for electrically connecting with the cable. The fitting portion is an integral punched part, the welding portion is an integral cold - forging part, and the front end portion of the welding portion is welded, riveted, or crimped to the rear end portion of the fitting portion.

[0006] According to an exemplary embodiment of the present invention, the mating portion is made of copper or a copper alloy, and the welded portion is made of aluminum, copper, a copper alloy, or an aluminum alloy.

[0007] According to another exemplary embodiment of the present invention, a plurality of elastic arms are formed on the circumferential wall of the mating portion, and the plurality of elastic arms are spaced apart in the circumferential direction of the mating portion for electrical contact with a mating terminal inserted into the mating portion.

[0008] According to another exemplary embodiment of the present invention, a plurality of windows are formed in the circumferential wall of the mating portion, a plurality of elastic arms are suspended from each of the windows, the rear ends of the elastic arms are connected to the rear side edges of the windows, and the front ends of the elastic arms protrude slightly into the internal cavity of the mating portion to make electrical contact with the inserted mating terminal.

[0009] According to another exemplary embodiment of the present invention, the mating portion has two joint edges extending along the axial direction of the mating portion, a projection is formed on one of the two joint edges for joining the two joint edges together, and a groove is formed on the other of the two joint edges for engaging with the projection.

[0010] According to another exemplary embodiment of the present invention, the projections and grooves are dovetail-shaped, T-shaped, or Ω-shaped.

[0011] According to another exemplary embodiment of the present invention, two projections are formed on one joint edge of the mating portion, the two projections being close to the front and rear ends of the mating portion, respectively, and two grooves are formed on the other joint edge of the mating portion, the two grooves being close to the front and rear ends of the mating portion, respectively.

[0012] According to another exemplary embodiment of the present invention, the weld has a cylindrical front end and a flat rear end, the cylindrical front end of the weld being welded to the rear end of the fitting, and the flat rear end of the weld being suitable for welding to the conductor of the cable.

[0013] According to another aspect of the present invention, a charging terminal is provided. The charging terminal comprises a cylindrical mating portion used for mating with a columnar mating terminal, and a welded portion used for welding to a cable for electrical connection with the cable. The mating portion is a single cold-formed part, and the welded portion is a single cold-formed part, the front end of the welded portion being welded, riveted, or crimped to the rear end of the mating portion.

[0014] According to an exemplary embodiment of the present invention, the mating portion is made of copper or a copper alloy, and the welded portion is made of aluminum, copper, a copper alloy, or an aluminum alloy.

[0015] According to another exemplary embodiment of the present invention, a plurality of segmented grooves are formed in the circumferential wall of the mating portion, and the plurality of segmented grooves are spaced apart in the circumferential direction of the mating portion and extend along the axial direction of the mating portion to reach the front end face of the mating portion, thereby dividing the circumferential wall of the mating portion into a plurality of cantilever portions for electrical contact with a mating terminal inserted into the mating portion.

[0016] According to another exemplary embodiment of the present invention, the axial extension of the segmented groove and the cantilever portion of the fitting portion is greater than half the axial length of the fitting portion and less than the axial length of the fitting portion.

[0017] According to another exemplary embodiment of the present invention, the weld has a cylindrical front end and a flattened rear end, the cylindrical front end of the weld being welded to the rear end of the fitting, and the flattened rear end of the weld being suitable for welding to the conductor of the cable.

[0018] According to another aspect of the present invention, a charging device is provided. The charging device includes a housing and the charging terminal provided on the housing.

[0019] According to an exemplary embodiment of the present invention, the charging device further includes a cable, one end of the cable extends to the housing and is welded to the flat rear end portion of the welded portion of the charging terminal.

[0020] According to another exemplary embodiment of the present invention, the charging device is a charging dock or a charging gun.

[0021] In the foregoing exemplary embodiment according to the present invention, since at least a part of the charging terminal is a cold forging part, not only the manufacturing cost is low, but also a large charging current can flow.

[0022] The above and other features of the present invention will become more apparent by describing its exemplary embodiments in detail with reference to the accompanying drawings.

Brief Description of the Drawings

[0023] [Figure 1] It is an exemplary perspective view of a charging terminal as viewed from the front side according to an exemplary first embodiment of the present invention. [Figure 2] It is an exemplary exploded view of a charging terminal as viewed from the front side according to an exemplary first embodiment of the present invention. [Figure 3] It is an exemplary perspective view of a charging terminal as viewed from the back side according to an exemplary first embodiment of the present invention. [Figure 4] It is an exemplary exploded view of a charging terminal as viewed from the back side according to an exemplary first embodiment of the present invention. [Figure 5] It is an exemplary perspective view of a charging terminal as viewed from the front side according to an exemplary second embodiment of the present invention. [Figure 6] It is an exemplary exploded view of a charging terminal as viewed from the front side according to an exemplary second embodiment of the present invention. [Figure 7]An exemplary perspective view of a charging terminal as viewed from the back side according to an exemplary second embodiment of the present invention. [Figure 8] An exemplary exploded view of a charging terminal as viewed from the back according to an exemplary second embodiment of the present invention.

Mode for Carrying Out the Invention

[0024] Exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Like reference numerals refer to like elements. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the present disclosure to those skilled in the art.

[0025] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawings.

[0026] According to a general concept of the present invention, a charging terminal is provided. The charging terminal includes a cylindrical fitting portion used for fitting with a columnar mating terminal, and a welding portion used for welding to a cable for electrically connecting with the cable. The fitting portion is an integral punched part, the welding portion is an integral cold forging part, and the front end portion of the welding portion is welded, riveted, or crimped to the rear end portion of the fitting portion.

[0027] According to another general concept of the present invention, a charging terminal is provided. The charging terminal includes a cylindrical fitting portion used for fitting with a columnar mating terminal, and a welding portion used for welding to a cable for electrically connecting with the cable. The fitting portion is an integral cold forging part, the welding portion is an integral cold forging part, and the front end portion of the welding portion is welded, riveted, or crimped to the rear end portion of the fitting portion.

[0028] According to another general concept of the present invention, a charging device is provided. The charging device comprises a housing and the charging terminals provided in the housing.

[0029] First Embodiment Figures 1 to 4 show a first embodiment of the charging terminal according to the present invention. In particular, Figure 1 shows an exemplary perspective view of the charging terminal 1 as seen from the front, according to an exemplary first embodiment of the present invention; Figure 2 shows an exemplary exploded view of the charging terminal 1 as seen from the front, according to an exemplary first embodiment of the present invention; Figure 3 shows an exemplary perspective view of the charging terminal 1 as seen from the rear, according to an exemplary first embodiment of the present invention; and Figure 4 shows an exemplary exploded view of the charging terminal 1 as seen from the rear, according to an exemplary first embodiment of the present invention.

[0030] As shown in Figures 1 to 4, an exemplary embodiment of the present invention discloses a charging terminal 1. The charging terminal 1 includes a mating portion 11 and a welded portion 12. The mating portion 11 is used to mate with a columnar mating terminal (not shown) and has a hollow cylindrical shape. The welded portion 12 is used to weld to a cable (not shown) for electrical connection with the cable. The mating portion 11 is a single stamped part, and the welded portion 12 is a single cold-forged part, with the front end of the welded portion 12 being welded, riveted, or crimped to the rear end of the mating portion 11.

[0031] As shown in Figures 1 to 4, in the illustrated embodiment, the fitting portion 11 can be made of a copper part or a copper alloy part, and the welded portion 12 can be made of an aluminum part, a copper part, a copper alloy part, or an aluminum alloy part.

[0032] As shown in Figures 1 to 4, in the illustrated embodiment, a plurality of elastic arms 111 are formed on the circumferential wall of the fitting portion 11, and the plurality of elastic arms 111 are arranged at intervals in the circumferential direction of the fitting portion 11 for electrical contact with the mating terminal inserted into the fitting portion 11.

[0033] As shown in Figures 1 to 4, in the illustrated embodiment, a plurality of windows 112 are formed in the peripheral wall of the fitting portion 11, and a plurality of elastic arms 111 are suspended from each of the windows 112. The rear end of each elastic arm 111 is connected to the rear side edge of the window 112, and the front end of each elastic arm 111 protrudes slightly into the internal cavity of the fitting portion 11 to make electrical contact with the inserted mating terminal.

[0034] As shown in Figures 1 to 4, in the illustrated embodiment, the fitting portion 11 has two joining edges 110 that extend along the axial direction of the fitting portion 11. To join the two joining edges 110 together, a projection 11a is formed on one of the two joining edges 110, and a groove 11b for engaging with the projection 11a is formed on the other of the two joining edges 110.

[0035] As shown in Figures 1 to 4, in the illustrated embodiment, the projections 11a and grooves 11b of the joint edge 110 are dovetail, T-shaped, or Ω-shaped. This prevents the two joint edges 110 from being separated in the circumferential direction of the fitting portion 11.

[0036] As shown in Figures 1 to 4, in the illustrated embodiment, two projections 11a are formed on one joint edge 110 of the fitting portion 11, and the two projections 11a are located close to the front end and rear end of the fitting portion 11, respectively. Two grooves 11b are formed on the other joint edge 110 of the fitting portion 11, and the two grooves 11b are located close to the front end and rear end of the fitting portion 11, respectively.

[0037] As shown in Figures 1 to 4, in the illustrated embodiment, the welded portion 12 has a cylindrical front end 121 and a flattened rear end 122. The cylindrical front end 121 of the welded portion 12 is welded to the rear end of the fitting portion 11, and the flattened rear end 122 of the welded portion 12 is suitable for welding to the conductor of the cable.

[0038] As shown in Figures 1 to 4, another exemplary embodiment of the present invention also discloses a charging device. The charging device includes a housing (not shown) and a charging terminal 1. The charging terminal 1 is provided on the housing.

[0039] As shown in Figures 1 to 4, in the illustrated embodiment, the charging device further comprises a cable (not shown), one end of which extends to the housing and is welded to the flattened rear end 122 of the welded portion 12 of the charging terminal 1.

[0040] As shown in Figures 1 to 4, in the illustrated embodiment, the charging device is a charging dock or a charging gun.

[0041] Second Embodiment Figures 5 to 8 show a second embodiment of the charging terminal according to the present invention. In particular, Figure 5 shows an exemplary perspective view of the charging terminal 1 as seen from the front, according to an exemplary second embodiment of the present invention; Figure 6 shows an exemplary exploded view of the charging terminal 1 as seen from the front, according to an exemplary second embodiment of the present invention; Figure 7 shows an exemplary perspective view of the charging terminal 1 as seen from the rear, according to an exemplary second embodiment of the present invention; and Figure 8 shows an exemplary exploded view of the charging terminal 1 as seen from the rear, according to an exemplary second embodiment of the present invention.

[0042] As shown in Figures 5 to 8, an exemplary embodiment of the present invention discloses a charging terminal 1. The charging terminal 1 includes a mating portion 11 and a welded portion 12. The mating portion 11 is used to mate with a columnar mating terminal (not shown) and has a hollow cylindrical shape. The welded portion 12 is used to weld to a cable (not shown) for electrical connection with the cable. The mating portion 11 is a single cold-forged part, and the welded portion 12 is a single cold-forged part, with the front end of the welded portion 12 welded, riveted, or crimped to the rear end of the mating portion 11.

[0043] As shown in Figures 5 to 8, in the illustrated embodiment, the fitting portion 11 can be made of a copper part or a copper alloy part, and the welded portion 12 can be made of an aluminum part, a copper part, a copper alloy part, or an aluminum alloy part.

[0044] As shown in Figures 5 to 8, in the illustrated embodiment, a plurality of segmented grooves 11c are formed in the circumferential wall of the fitting portion 11. The plurality of segmented grooves 11c are spaced apart in the circumferential direction of the fitting portion 11 and extend along the axial direction of the fitting portion 11 until they reach the front end surface of the fitting portion 11. This divides the circumferential wall of the fitting portion 11 into a plurality of cantilever portions 11d, which are used to make electrical contact with the mating terminal inserted into the fitting portion 11.

[0045] As shown in Figures 5 to 8, in the illustrated embodiment, the axial extension of the divided groove 11c and the cantilever portion 11d of the fitting portion 11 is greater than half the axial length of the fitting portion 11 and less than the axial length of the fitting portion 11.

[0046] As shown in Figures 5 to 8, in the illustrated embodiment, the welded portion 12 has a cylindrical front end 121 and a flattened rear end 122. The cylindrical front end 121 of the welded portion 12 is welded to the rear end of the fitting portion 11, and the flattened rear end 122 of the welded portion 12 is suitable for welding to the conductor of the cable.

[0047] As shown in Figures 5 to 8, another exemplary embodiment of the present invention also discloses a charging device. The charging device includes a housing (not shown) and a charging terminal 1. The charging terminal 1 is provided on the housing.

[0048] As shown in Figures 5 to 8, in the illustrated embodiment, the charging device further comprises a cable (not shown), one end of which extends to the housing and is welded to the flattened rear end 122 of the welded portion 12 of the charging terminal 1.

[0049] As shown in Figures 5 to 8, in the illustrated embodiment, the charging device is a charging dock or a charging gun.

[0050] Those skilled in the art should understand that the above embodiments are illustrative and not intended to be limiting. For example, many modifications to the above embodiments may be made by those skilled in the art, and various features described in different embodiments may be freely combined with one another without structural or principle contradiction.

[0051] While several exemplary embodiments have been illustrated and described, those skilled in the art will understand that various modifications or changes can be made to these embodiments without departing from the principles and spirit of the disclosure. The scope of the disclosure is defined in the claims and its equivalents.

[0052] Where used herein, elements described in the singular and preceded by the words "a" or "an" should be understood not to exclude multiple such elements or steps unless otherwise expressly stated. Furthermore, references to “one embodiment” of the present invention are not intended to be construed as excluding the existence of additional embodiments incorporating the described features. Moreover, unless otherwise expressly stated to the contrary, embodiments “equipping” or “having” one or more elements having a particular characteristic may include additional such elements that do not possess that characteristic.

Claims

1. A cylindrical mating portion (11) used for mating with a columnar mating terminal, A welded portion (12) used to weld to the cable in order to electrically connect with the cable and Equipped with, The fitting portion (11) is a single stamped part, and the welded portion (12) is a single cold-formed part, and the front end of the welded portion (12) is welded, riveted, or crimped to the rear end of the fitting portion (11). Charging terminal.

2. The charging terminal according to claim 1, wherein the mating portion (11) is made of copper or a copper alloy, and the welded portion (12) is made of aluminum, copper, a copper alloy, or an aluminum alloy.

3. A charging terminal according to claim 1, wherein a plurality of elastic arms (111) are formed on the circumferential wall of the fitting portion (11), and the plurality of elastic arms (111) are spaced apart in the circumferential direction of the fitting portion (11) for electrical contact with the mating terminal inserted into the fitting portion (11).

4. Multiple windows (112) are formed in the peripheral wall of the fitting portion (11), and the multiple elastic arms (111) are suspended from each of the multiple windows (112). The charging terminal according to claim 3, wherein the rear end of the elastic arm (111) is connected to the rear side edge of the window (112), and the front end of the elastic arm (111) protrudes slightly into the internal cavity of the mating portion (11) to make electrical contact with the inserted mating terminal.

5. The charging terminal according to claim 1, wherein the fitting portion (11) has two joining edges (110) extending along the axial direction of the fitting portion (11), a projection (11a) is formed on one of the two joining edges (110) for joining the two joining edges (110) together, and a groove (11b) for engaging with the projection (11a) is formed on the other of the two joining edges (110).

6. The charging terminal according to claim 5, wherein the projection (11a) and the groove (11b) are dovetail-shaped, T-shaped, or Ω-shaped.

7. Two protrusions (11a) are formed on one of the joining edges (110) of the fitting portion (11), and the two protrusions (11a) are close to the front end and rear end of the fitting portion (11), respectively. The charging terminal according to claim 5, wherein two grooves (11b) are formed in the other joint edge (110) of the fitting portion (11), and the two grooves (11b) are located close to the front end and rear end of the fitting portion (11), respectively.

8. The charging terminal according to claim 1, wherein the welded portion (12) has a cylindrical front end (121) and a flattened rear end (122), the cylindrical front end (121) of the welded portion (12) is welded to the rear end of the fitting portion (11), and the flattened rear end (122) of the welded portion (12) is suitable for welding to the conductor of the cable.

9. A cylindrical mating portion (11) used for mating with a columnar mating terminal, A welded portion (12) used to weld to the cable in order to electrically connect with the cable and Equipped with, The fitting portion (11) is a single cold-forged part, and the welded portion (12) is a single cold-forged part, and the front end of the welded portion (12) is welded, riveted, or crimped to the rear end of the fitting portion (11). Charging terminal.

10. The charging terminal according to claim 9, wherein the mating portion (11) is made of copper or a copper alloy, and the welded portion (12) is made of aluminum, copper, a copper alloy, or an aluminum alloy.

11. A charging terminal according to claim 9, wherein a plurality of segmented grooves (11c) are formed in the circumferential wall of the fitting portion (11), the plurality of segmented grooves (11c) are spaced apart in the circumferential direction of the fitting portion (11), and extend along the axial direction of the fitting portion (11) to reach the front end surface of the fitting portion (11), thereby dividing the circumferential wall of the fitting portion (11) into a plurality of cantilever portions (11d) for electrical contact with the mating terminal inserted into the fitting portion (11).

12. The charging terminal according to claim 11, wherein the extending length of the divided groove (11c) and the cantilever portion (11d) in the axial direction of the fitting portion (11) is greater than half the axial length of the fitting portion (11) and less than the axial length of the fitting portion (11).

13. The charging terminal according to claim 9, wherein the welded portion (12) has a cylindrical front end (121) and a flattened rear end (122), the cylindrical front end (121) of the welded portion (12) is welded to the rear end of the fitting portion (11), and the flattened rear end (122) of the welded portion (12) is suitable for welding to the conductor of the cable.

14. Housing and The housing is provided with the charging terminal (1) according to any one of claims 1 to 13 and A charging device equipped with the following features.

15. The charging device according to claim 14, further comprising a cable, one end of which extends to the housing and is welded to the flattened rear end (122) of the welded portion (12) of the charging terminal (1).

16. The charging device according to claim 14, wherein the charging device is a charging dock or a charging gun.

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