Connection terminals and high voltage connectors

Abstract

The present invention discloses a connection terminal and a high-voltage connector, including a terminal body and a reinforcement component, the terminal body including a contact portion and a cable connection portion, the reinforcement component being sleeved on the contact portion, a group of first contact pieces and second contact pieces being symmetrically arranged between the first side surface and the second side surface of the contact portion, each of the first contact piece and the second contact piece being respectively concave relative to the axis of the contact portion to form an arc surface, the shortest distance between the first contact piece and the second contact piece being the first wave crest and the second wave crest, the surfaces of the first wave crest and the second wave crest being parallel, and a group of grooves being arranged at intervals to form a symmetrical serrated contact surface. The present invention provides a serrated contact surface, which is deformed by the pressure generated during the connection with the high-voltage connector, so as to fit tightly with the plug-in terminal to form a multi-contact contact, thereby ensuring the electrical connection between the connection terminal and the plug-in terminal and reducing the heat generation power, thereby improving the performance and safety of use.

Description

Technical Field

[0001] The present invention relates to the technical field of connecting terminals, and in particular to a connecting terminal and a high-voltage connector. Background Art

[0002] At present, on new energy vehicle charging equipment, high-voltage connectors need to use terminals for high current transmission, so the stability of the terminals for electrical connection is particularly important. In order to ensure the close contact between the contact part and other connecting parts, the existing connecting terminals will set the contact part in the shape of an arc-shaped spring sheet, and the elasticity of the upper and lower spring sheets will keep it in close contact with the connecting parts. For example, a terminal connector and a socket terminal disclosed in Chinese Patent No. 202010147091.7.

[0003] However, in actual use, in order to increase the contact area of ​​the elastic contact portion of the connection terminal, a wider elastic contact piece is provided for connection. However, once the elastic contact piece is widened, the flatness of its top surface is difficult to guarantee. Once the top surface is not flat enough, the connection between the elastic contact piece and the connector will fail, or only point contact will be formed, which will hinder the transmission of large currents. At the same time, due to the small contact area, the contact resistance will be large and the heat will be large. Once the heat dissipation effect is not ideal, it is easy to overheat, which will bring great safety hazards to charging.

[0004] Therefore, how to improve the effective connection between the connecting terminal and the connecting piece is a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a connecting terminal and a high voltage connector.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A connecting terminal comprises a terminal body and a reinforcing component, wherein the terminal body comprises a contact portion for connecting to a plug terminal and a cable connecting portion for connecting to a cable, the reinforcing component is sleeved on the contact portion, a group of first contact pieces and second contact pieces are symmetrically arranged between the first side surface and the second side surface of the contact portion, each of the first contact piece and the second contact piece is respectively concave relative to the axis of the contact portion to form an arc surface, the shortest distance between the first contact piece and the second contact piece is the first wave crest and the second wave crest, the surfaces of the first wave crest and the second wave crest are parallel, and a group of grooves are arranged at intervals to form a symmetrical serrated contact surface.

[0008] Preferably, a strip-shaped notch is formed in the middle portion of the third side surface of the contact portion along its extension direction, and the width of the strip-shaped notch expands from the tube mouth of the contact portion toward the tube body thereof, so that the first side surface and the second side surface are elastically abutted or a gap is formed.

[0009] Preferably, the distance between the first wave crest and the second wave crest in the initial state is smaller than the thickness of the plug terminal.

[0010] Preferably, the first contact pieces and the second contact pieces are integrally formed with the contact portion, and each of the first contact pieces and each of the second contact pieces are spaced apart.

[0011] Preferably, the cable connecting portion comprises a tongue-shaped conductor sheet and a tongue-shaped insulating sheet, the conductor sheet is located between the tube body and the insulating sheet, and the conductor sheet and the insulating sheet are both bent into a cylindrical shape to be covered on the outside of the cable.

[0012] Preferably, the conductor sheet is connected to the tube body via a connecting tube portion, and a connecting surface between the connecting tube portion and the tube body extends obliquely toward an opening of the connecting tube portion.

[0013] Preferably, the reinforcing component is a stainless steel pipe sleeve, and the reinforcing component is fixedly connected to the contact portion and extends from the pipe opening to the rear end of the pipe body.

[0014] Preferably, the front end of the side surface of the reinforcing component parallel to the first side surface and the second side surface is formed with a bending portion bent inwardly, and the bending portions are respectively engaged with the pipe openings; the tail of the reinforcing component is also provided with a buckle to engage with the contact portion.

[0015] Preferably, an elastic locking piece is integrally formed on the side surface of the reinforcing component which is parallel to the first side surface and the second side surface.

[0016] A high voltage connector comprises the connection terminal as described above.

[0017] The beneficial effects of the present invention are mainly reflected in:

[0018] 1. The first contact piece and the second contact piece are concave to form the first wave crest and the second wave crest. The first wave crest and the second wave crest form a serrated contact surface through the grooves arranged at intervals. Due to the presence of the grooves, the contact surface can be deformed by the pressure generated during the connection process with the plug-in terminal of the high-voltage connector, so as to fit closely with the plug-in terminal to form a multi-contact contact. On the one hand, the electrical contact between the connection terminal and the plug-in terminal is ensured. On the other hand, the multi-contact contact increases the contact area and reduces the contact resistance, thereby ensuring the transmission of large current while reducing the heat generation power, greatly improving the performance and safety of the connection terminal, and achieving the purpose of energy saving and emission reduction;

[0019] 2. The cable connection part can conveniently cover the cable through the tongue-shaped conductor sheet and the insulating sheet, and the connecting surface between the connecting tube and the tube body extends obliquely toward the opening of the connecting tube, which can increase the height of the connecting tube as much as possible to improve the inclusiveness of the connecting tube, so that it can meet the installation requirements of thicker cables;

[0020] 3. A reinforcing component is fixedly connected to the outside of the contact part to fully cover the contact part, increase the overall strength of the contact part, make it less likely to deform, and ensure the stability of the connection between it and the high-voltage connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0022] Figure 1 : An exploded schematic diagram of an embodiment of the present invention;

[0023] Figure 2 : A cross-sectional view of an embodiment of the present invention;

[0024] Figure 3 : A partial cross-sectional view of an embodiment of the present invention;

[0025] Figure 4 : A partial cross-sectional view of an embodiment of the present invention;

[0026] Figure 5 : A schematic diagram of an embodiment of the present invention;

[0027] Figure 6 : Partial schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all included in the protection scope of the present invention.

[0029] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0030] like Figures 1 to 6 As shown, the present invention discloses a connection terminal, comprising a terminal body and a reinforcing component 3, wherein the terminal body comprises a contact portion 1 and a cable connecting portion 2, wherein the reinforcing component 3 is sleeved on the contact portion 1, wherein a group of first contact pieces 101 and second contact pieces 102 are symmetrically arranged between the first side surface 100 and the second side surface 200 of the contact portion 1, wherein each of the first contact piece 101 and the second contact piece 102 is concave relative to the axis of the contact portion 1 to form an arc surface, wherein the shortest distance between the first contact piece 101 and the second contact piece 102 is the first crest 103 and the second crest 104, wherein the surfaces of the first crest 103 and the second crest 104 are parallel, and a group of grooves 105 are arranged at intervals to form a symmetrical serrated contact surface. The contact portion 1 is used to electrically connect with a sheet-shaped plug-in terminal (not shown in the figure) on a high-voltage connector, and the cable connecting portion 2 is used to connect a cable (not shown in the figure).

[0031] like Figure 2-4 As shown, due to the presence of the groove 105, the sawtooth contact surface between the first wave crest 103 and the second wave crest 104 can be deformed to a certain extent when subjected to pressure during the connection process with the plug-in terminal of the high-voltage connector due to the reduction of internal stress, so as to closely fit with the plug-in terminal to form a multi-contact contact, thereby avoiding the situation where the conventional contact piece and the plug-in terminal are not fitted or only fit at a single point. In this way, on the one hand, the electrical contact between the first contact piece 101 and the second contact piece 102 and the plug-in terminal is ensured; on the other hand, because the multi-contact contact increases the contact area between the first contact piece 101 and the second contact piece 102 and the plug-in terminal, the contact resistance can be reduced, thereby ensuring the transmission of large current while reducing the heat generation power. In actual testing, under the same current size, the heat generation power of this solution can be reduced by 20%-25%, which greatly improves the performance and safety of the connection terminal and achieves the purpose of energy saving and emission reduction.

[0032] In the illustrated embodiment, two first contact sheets 101 and second contact sheets 102 are formed on the first side surface 100 and the second side surface 200, respectively, and each first contact sheet 101 and each second contact sheet 102 are arranged at intervals. In other feasible embodiments, more than two first contact sheets 101 and second contact sheets 102 may be formed on the first side surface 100 and the second side surface 200 according to specific needs, which is not limited here. Further, the first contact sheet 101 and the second contact sheet 102 are integrally formed with the contact portion 1 to facilitate manufacturing, and the contact portion is preferably made of copper to make it have good electrical conductivity. In other feasible embodiments, the contact portion may also be made of other materials with high electrical conductivity.

[0033] like Figure 4 As shown, the middle part of the third side surface 300 of the contact portion 1 is formed with a strip notch 108 along its extension direction, and the width of the strip notch 108 expands from the tube mouth 106 of the contact portion 1 to the tube body 107 thereof, so that the first side surface 100 and the second side surface 200 are elastically abutted or a gap is formed. The structural setting of the strip notch 108 can ensure that there is a contraction pressure at the tube mouth 106 of the contact portion 1, and then there is a contraction pressure between the first wave crest 103 and the second wave crest 104, so as to ensure that the first wave crest 103 and the second wave crest 104 maintain close contact with the plug terminal.

[0034] Specifically, in order to ensure that the first contact piece 101 and the second contact piece 102 can be in close contact with the plug-in terminal, the distance between the first crest 103 and the second crest 104 in the initial state is smaller than the thickness of the plug-in terminal. In a preferred embodiment, the distance between the first crest 103 and the second crest 104 in the initial state is 0.6 mm. Due to the provision of the strip-shaped notch 108, the first contact piece 101 and the second contact piece 102 can be deformed to a certain extent when plugged into the plug-in terminal to maintain close contact with the plug-in terminal.

[0035] like Figure 1 , 5 As shown, the cable connection part 2 includes a tongue-shaped conductor sheet 201 and a tongue-shaped insulating sheet 202, the conductor sheet 201 is located between the tube body 107 and the insulating sheet 201, and the conductor sheet 201 and the insulating sheet 202 are both bent into a cylindrical shape to be wrapped around the outside of the cable. This is a prior art and will not be described in detail here.

[0036] Furthermore, the conductor sheet 201 is connected to the tube body 107 via a connecting tube portion 203, and a connecting surface 204 between the connecting tube portion 203 and the tube body 107 extends obliquely toward the opening of the connecting tube portion 203. The oblique extension structure of the connecting surface 204 allows the connecting tube portion 203 to increase its height as much as possible to meet the coating requirements of cables of different specifications. This preferred embodiment can meet the requirements of cables with a cross-sectional area of ​​6 square millimeters, and the wall thickness of the connecting tube portion 203 is between 0.32-0.4 mm to ensure that it has high conductivity.

[0037] The reinforcing member 3 in the present invention is a stainless steel pipe sleeve, which is fixedly connected to the contact portion 1 and extends from the pipe mouth 106 to the tail end of the pipe body 107 to fully cover the contact portion 1, increase the overall strength of the contact portion 1, make it less likely to deform, and ensure the stability of the connection between it and the high-voltage connector. In a preferred embodiment, the reinforcing member 3 and the contact portion 1 are fixed together by welding. In other feasible embodiments, the reinforcing member 3 can also be fixedly connected to the contact portion 1 by other feasible methods.

[0038] like Figure 1 , 3 As shown in FIGS. 5 and 6 , the front end of the side surface of the reinforcing component 3 parallel to the first side surface 100 and the second side surface 200 is formed with an inwardly bent portion 301, and the bent portion 301 is respectively engaged with the pipe opening 106. The rear portion of the reinforcing component 3 is also provided with a buckle 303 to engage with the contact portion 1, so as to improve the stability of the connection between the reinforcing component 3 and the contact portion 1, and improve the support of the reinforcing component 3 to the contact portion 1.

[0039] Furthermore, an elastic locking piece 302 is integrally formed on the side of the reinforcing component 3 parallel to the first side 100 and the second side 200. The provision of the elastic locking piece 302 can facilitate the fixed locking between the elastic locking piece 302 and the high-voltage connector.

[0040] The present invention also discloses a high-voltage connector, which includes the connection terminal as described above. The high-voltage connector also includes a plug-in terminal (not shown in the figure) and other components for high-voltage connection. In addition, the prior art is not the focus of the present invention and is not described here. The plug-in terminal is plugged into the connection terminal to perform a multi-contact connection to transmit a large current, while reducing the heat generation power to ensure the safety of the high-voltage connector.

[0041] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0042] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A connecting terminal, comprising a terminal body and a reinforcing component (3), characterized in that: The terminal body comprises a contact portion (1) for connecting to a plug terminal and a cable connection portion (2) for connecting to a cable, the reinforcing component (3) being sleeved on the contact portion (1), a group of first contact pieces (101) and second contact pieces (102) being symmetrically arranged between a first side surface (100) and a second side surface (200) of the contact portion (1), each of the first contact piece (101) and the second contact piece (102) being concave relative to the axis of the contact portion (1) to form an arc surface, the shortest distance between the first contact piece (101) and the second contact piece (102) being a first wave crest (103) and a second wave crest (104), the surfaces of the first wave crest (103) and the second wave crest (104) being parallel, and a group of grooves (105) being arranged at intervals to form a symmetrical sawtooth contact surface; A strip-shaped notch (108) is formed in the middle portion of the third side surface (300) of the contact portion (1) along its extension direction, and the width of the strip-shaped notch (108) increases from the tube opening (106) of the contact portion (1) to the tube body (107) thereof, so that the first side surface (100) and the second side surface (200) are elastically abutted or a gap is formed; The distance between the first wave crest (103) and the second wave crest (104) in the initial state is smaller than the thickness of the plug terminal; The reinforcing component (3) is a stainless steel pipe sleeve, the reinforcing component (3) is fixedly connected to the contact portion (1) and extends from the pipe opening (106) to the rear end of the pipe body (107); The front end of the side surface of the reinforcing component (3) parallel to the first side surface (100) and the second side surface (200) is formed with a bent portion (301) bent inwardly, and the bent portion (301) is respectively snap-fitted with the pipe opening (106); the rear end of the reinforcing component (3) is also provided with a buckle (303) for snap-fitting with the contact portion (1).

2. The connecting terminal according to claim 1, characterized in that: The first contact pieces (101) and the second contact pieces (102) are integrally formed with the contact portion (1), and each of the first contact pieces (101) and each of the second contact pieces (102) are arranged at intervals.

3. The connecting terminal according to claim 2, characterized in that: The cable connection portion (2) comprises a tongue-shaped conductor sheet (201) and a tongue-shaped insulating sheet (202); the conductor sheet (201) is located between the tube body (107) and the insulating sheet (201); and both the conductor sheet (201) and the insulating sheet (202) are formed into a cylindrical shape by bending to cover the outside of the cable.

4. The connecting terminal according to claim 3, characterized in that: The conductor sheet (201) and the tube body (107) are connected via a connecting tube portion (203), and a connecting surface (204) between the connecting tube portion (203) and the tube body (107) extends obliquely toward an opening of the connecting tube portion (203).

5. The connecting terminal according to claim 1, characterized in that: An elastic locking piece (302) is integrally formed on the side surface of the reinforcing component (3) which is parallel to the first side surface (100) and the second side surface (200).

6. High voltage connector, characterized in that: It comprises a connecting terminal as described in any one of claims 1 to 5.

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