Terminal post, electrical connector, electrical connection device and electric vehicle

Abstract

The present invention provides a terminal post, an electrical connector, an electrical connection device and an electric vehicle. The terminal post is used for the electrical connector, and the terminal post has an electrical contact end, and the end face of the electrical contact end has an outwardly protruding arc portion. The electrical connector includes a terminal post mounting seat, a terminal post, a guide groove and an elastic member. The terminal post mounting seat is provided with a mounting hole, the terminal post passes through the mounting hole, the guide groove is provided on the side wall of the mounting hole, and the elastic member is located in the mounting hole. The electrical connection device includes the above-mentioned electrical connector and a battery terminal electrical connector. The electric vehicle includes a battery accommodating portion, and the battery accommodating portion has the electrical connector as described above. The end face of the electrical contact end of the terminal post has an arc portion. When vibration occurs during the driving of the electric vehicle, the terminal post and the end face of another terminal post can still be in relatively reliable contact, and the end faces of the two terminal posts are not easily separated instantaneously, which is beneficial to improving the reliability of the electrical connection.

Description

Technical Field

[0001] The present invention relates to a terminal post, an electrical connector, an electrical connection device and an electric vehicle. Background Art

[0002] The electrical connector includes a vehicle-end electrical connector and a battery-end electrical connector. The vehicle-end electrical connector is installed on a quick-change bracket connected to the vehicle or directly installed on the electric vehicle, and the battery-end electrical connector is installed on the quick-change battery pack. The electrical contact ends of the low-voltage terminal posts of the battery-end electrical connector (the low-voltage terminal posts include wiring ends and electrical contact ends) are respectively electrically connected to the electrical contact ends of the low-voltage terminal posts of the vehicle-body-end electrical connector one by one. In the prior art, the low-voltage terminal posts of the battery-end electrical connector have a certain degree of freedom in the X, Y, and Z directions relative to the low-voltage terminal posts of the vehicle-body-end electrical connector. During the operation of the electric vehicle, certain vibrations will occur, so that the low-voltage terminal posts of the battery-end electrical connector will displace relative to the low-voltage terminal posts of the vehicle-body-end electrical connector, and then friction will occur, resulting in damage to the end faces of the electrical contact ends of the low-voltage terminal posts of the battery-end electrical connector, affecting the stability of the electrical connection. In addition, since the end faces of the electrical contact ends of the two low-voltage terminal posts are both flat structures, under the influence of the above vibrations, the two contact surfaces are prone to instantaneous separation, which will also affect the reliability of the electrical connection.

[0003] In summary, in the prior art, when the low-voltage terminal posts of the battery-end electrical connector are electrically connected to the low-voltage terminal posts of the vehicle-body-end electrical connector, there is a defect of low stability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of low stability when the low-voltage terminal posts of the battery-end electrical connector are electrically connected to the low-voltage terminal posts of the vehicle-body-end electrical connector in the prior art, and provide a terminal post, an electrical connector, an electrical connection device and an electric vehicle.

[0005] The present invention solves the above technical problem through the following technical solutions:

[0006] A terminal post for an electrical connector, the terminal post having an electrical contact end, characterized in that the end face of the electrical contact end has an outwardly convex arc portion.

[0007] In this solution, the end face of the electrical contact end of the terminal post has an arc portion. When the terminal post is electrically connected to the end face of the terminal post of another electrical connector, whether the end face of the other electrical connector is an arc surface or a flat surface, when vibrations occur during the driving of the electric vehicle, the end faces of the two terminal posts can still contact relatively reliably, and the end faces of the two terminal posts are not prone to instantaneous separation, which is beneficial to improving the reliability of the electrical connection.

[0008] Preferably, the radius of the arc of the arc portion ranges from 8 to 10 mm.

[0009] In this solution, if the radius of the arc is too large, the arc-shaped part is not much different from the plane. During the above vibration, the two pole columns will still be instantaneously separated, resulting in low reliability of the electrical connection. If the radius of the arc is too small, the contact area between the arc-shaped part and the end face of the other pole column is too small, which also easily reduces the reliability of the electrical connection.

[0010] Preferably, the arc-shaped part is symmetric about the central axis of the pole column.

[0011] In this solution, adopting the above structural arrangement is conducive to further improving the reliability of the electrical connection between this pole column and the other pole column.

[0012] Preferably, the pole column includes a pole column body, one end of the pole column body is the electrical contact end, and the other end is the wiring end;

[0013] The pole column further includes a guiding foot, which is arranged on the outer wall surface of the pole column body and extends outward along the radial direction of the pole column body;

[0014] Preferably, the guiding foot is located on the end face of the wiring end;

[0015] Preferably, the guiding foot is integrally formed with the pole column body.

[0016] In this solution, the existence of the guiding foot enables the pole column to rotate in the direction defined by the guiding groove corresponding to the guiding foot under the action of the elastic force, so that the pole column can achieve the effect of automatically cleaning the end contact surface, which is conducive to further improving the reliability of the electrical connection between this pole column and the other pole column.

[0017] Preferably, the pole column further has a wire pressing body, which is connected to the wiring end and is located on the side of the guiding foot away from the pole column body;

[0018] The wire pressing body has a connected wire pressing body head and a wire pressing body tail. One end of the wire pressing body head away from the wire pressing body tail is connected to the wiring end. The diameter of one end of the wire pressing body tail connected to the wire pressing body head is smaller than the diameter of the end of the wire pressing body tail away from the wire pressing body head. The diameter of one end of the wire pressing body head connected to the wire pressing body tail is equal to the diameter of the end of the wire pressing body head away from the wire pressing body tail;

[0019] Among them, the wire pressing body is provided with a wire groove, which extends from the wire pressing body tail to the wire pressing body head, and the wire groove is communicated with the inside of the pole column body.

[0020] In this solution, the head of the wire pressing body is a cylindrical structure, and the tail of the wire pressing body is a horn-shaped structure, which is convenient for storing cables and can protect the cables more reliably, helping to further improve the reliability of the electrical connection between this pole column and another pole column.

[0021] Preferably, a limiting boss is provided in the middle of the pole column body, and the limiting boss extends outward from the outer wall surface of the pole column body.

[0022] The present invention also provides an electrical connector, including a pole column mounting seat provided with a mounting hole. The electrical connector is characterized in that it further includes:

[0023] The pole column as described above, and the pole column passes through the mounting hole;

[0024] A guiding groove provided on the side wall of the mounting hole;

[0025] An elastic member located within the mounting hole;

[0026] Wherein, the pole column includes a pole column body, one end of the pole column body is the electrical contact end and the other end is the wiring end. The pole column further includes guiding feet provided on the outer wall surface of the pole column body and extending outward along the radial direction of the pole column body;

[0027] When the guiding feet move into the guiding groove, the guiding feet slide in the guiding groove, and the guiding feet cooperate with the guiding groove to define the rotation direction of the pole column;

[0028] The elastic member is sleeved outside the pole column body, and the elastic member is used to drive the pole column to move along the rotation direction set by the guiding groove.

[0029] In this solution, the end face of the electrical contact end of the pole column has an arc portion. When this pole column is electrically connected to the end face of the pole column of another electrical connector, whether the end face of the other electrical connector is an arc surface or a flat surface, during the vibration of the electric vehicle during driving, the end faces of the two pole columns can still be in reliable contact, and the end faces of the two pole columns are not easily separated instantaneously, which helps to improve the reliability of the electrical connection. In addition, the cooperation between the guiding feet and the guiding groove can define the rotation direction of the pole column, and the elastic member drives the pole column to move along the rotation direction set by the guiding groove, thereby achieving the effect of cleaning the end face of the pole column, which helps to improve the reliability of the electrical connection between this pole column and another pole column, and further improves the reliability of the electrical connection of the electrical connector including this pole column.

[0030] Preferably, the pole column is a low-voltage pole column, and the electrical connector further includes a high-voltage pole column. The high-voltage pole column has a wiring terminal and an electrical contact terminal. The wiring terminal of the high-voltage pole column is floatingly electrically connected to the high-voltage plug through a flexible conductive member, and the electrical contact terminal of the high-voltage pole column is floatingly electrically connected to the battery terminal electrical connector;

[0031] Wherein, the flexible conductive member is made of a flexible conductive material.

[0032] In this solution, the flexible conductive member can be stretched, compressed and radially twisted, and can adapt to the relative displacement changes in various angles such as axial and radial directions between structural connections, avoiding the deterioration of electrical connection performance caused by the change of relative displacement. Therefore, it is beneficial to improve the reliability of the electrical connection between the high-voltage pole column and the high-voltage plug. Similarly, the reliability of the electrical connection between the electrical contact terminal of the high-voltage pole column and the battery terminal electrical connector is also relatively high.

[0033] The present invention also provides an electrical connection device, which is characterized in that it includes a battery terminal electrical connector and the electrical connector as described above.

[0034] The present invention also provides an electric vehicle, including a battery accommodating part, which is characterized in that the battery accommodating part has the electrical connector as described above.

[0035] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0036] The positive and progressive effects of the present invention are as follows:

[0037] In this pole column, the end face of the electrical contact terminal of the pole column has an arc portion. When this pole column is electrically connected to the end face of the pole column of another electrical connector, whether the end face of the other electrical connector is an arc surface or a flat surface, when vibration occurs during the driving of the electric vehicle, the end faces of the two pole columns can still be in relatively reliable contact, and the end faces of the two pole columns are not easily separated instantaneously, which is beneficial to improving the reliability of the electrical connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of the pole column of a preferred embodiment of the present invention.

[0039] Figure 2 It is a schematic overall structural diagram of the electrical connector of a preferred embodiment of the present invention.

[0040] Figure 3 It is a schematic exploded structural diagram of the electrical connector of a preferred embodiment of the present invention.

[0041] Figure 4 For Figure 2 The cross-sectional structural diagram along A-A in

[0042] Figure 5 is Figure 2 Schematic cross-sectional structure diagram along B-B in

[0043] Figure 6 Schematic structure diagram of an electrical connection device according to a preferred embodiment of the present invention.

[0044] Figure 7 Partial schematic structure diagram of an electrical connection device according to a preferred embodiment of the present invention.

[0045] Figure 8 Schematic structure diagram when the low-voltage pole of the battery terminal electrical connector contacts the low-voltage pole of the vehicle body terminal electrical connector in an electrical connection device according to a preferred embodiment of the present invention.

[0046] Description of reference numerals:

[0047] 1 Vehicle body terminal electrical connector

[0048] 10 Pole

[0049] 101 Arc portion

[0050] 102 Pole body

[0051] 103 Guide foot

[0052] 104 Pressing body

[0053] 1041 Pressing body head

[0054] 1042 Pressing body tail

[0055] 1043 Cable groove

[0056] 105 Limiting boss

[0057] 20 Pole mounting seat

[0058] 201 Mounting hole

[0059] 2011 Main board mounting hole

[0060] 2012 Cover plate mounting hole

[0061] 2013 Limiting groove

[0062] 202 Guide groove

[0063] 203 Main board

[0064] 2031 Housing

[0065] 2032 Intermediate block

[0066] 204 Cover plate

[0067] 30 Elastic member

[0068] 40 High-voltage terminal post

[0069] 401 Groove

[0070] 2 Battery terminal electrical connector

[0071] 3 High-voltage plug

[0072] 4 Flexible conductive member

[0073] 41 First joint

[0074] 42 Second joint

[0075] 43 Cavity

[0076] 5 Insulating sleeve

[0077] 51 Receiving cavity Specific implementation manner

[0078] The present invention will be more clearly and completely described below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments thereby.

[0079] This embodiment discloses a terminal post, which is used for an electrical connector. Referring to Figure 1 and Figure 8 for understanding, the terminal post 10 has an electrical contact end, and the end face of the electrical contact end has an outwardly convex arc portion 101.

[0080] In this embodiment, the end face of the electrical contact end of the terminal post 10 has an arc portion 101. When the terminal post 10 is electrically connected to the end face of the terminal post of another electrical connector, no matter whether the end face of the other electrical connector is an arc surface or a flat surface, during the vibration of the electric vehicle during driving, the end faces of the two terminal posts can still be in relatively reliable contact, and the end faces of the two terminal posts are not likely to be instantaneously separated, which is beneficial to improving the reliability of the electrical connection.

[0081] Furthermore, in this embodiment, the radius of the arc of the arc portion 101 is 9 mm. In addition, the arc portion 101 is symmetric about the central axis of the terminal post 10. In other alternative embodiments, the radius of the arc of the arc portion 101 can be set to any other value in the range of 8 to 10 mm.

[0082] Among them, if the radius of the arc is too large, the arc portion 101 is not much different from the flat surface. During the above vibration process, the two terminal posts will still be instantaneously separated, resulting in low reliability of the electrical connection; if the radius of the arc is too small, the contact area between the arc portion 101 and the end face of the other terminal post is too small, which is also likely to reduce the reliability of the electrical connection.

[0083] Even further, referring to Figure 1It is understood that the terminal post 10 includes a terminal post body 102. One end of the terminal post body 102 is an electrical contact end, and the other end is a wiring end. The terminal post 10 further includes guiding feet 103, which are provided on the outer wall surface of the terminal post body 102 and extend outward along the radial direction of the terminal post body 102. As can be seen from the figure, in this embodiment, the number of guiding feet 103 is three, and the three guiding feet 103 are evenly spaced along the circumferential direction of the terminal post body 102. In this way, by setting the number and position of the guiding feet 103, the movement of the terminal post 10 can be made more stable during rotation. In other embodiments, the number of guiding feet 103 can also be two, four or other values, and these guiding feet 103 are evenly spaced along the circumferential direction of the terminal post body 102. In addition, in this embodiment, the guiding feet 103 are located on the end face of the wiring end, and the guiding feet 103 are integrally formed with the terminal post body 102.

[0084] Among them, the existence of the guiding feet 103 enables the terminal post 10 to rotate in the direction defined by the guiding grooves 202 correspondingly arranged with the guiding feet 103 under the action of elastic force, so that the terminal post 10 can achieve the effect of automatically cleaning the end contact surface, which is beneficial to further improving the reliability of the electrical connection between the terminal post 10 and another terminal post.

[0085] Furthermore, the terminal post 10 further has a wire pressing body 104, and the wire pressing body 104 is connected to the wiring end and is located on the side of the guiding feet 103 away from the terminal post body 102;

[0086] The wire pressing body 104 has a connected wire pressing body head 1041 and a wire pressing body tail 1042. One end of the wire pressing body head 1041 away from the wire pressing body tail 1042 is connected to the wiring end. The diameter of one end of the wire pressing body tail 1042 connected to the wire pressing body head 1041 is smaller than the diameter of the end of the wire pressing body tail 1042 away from the wire pressing body head 1041. The diameter of one end of the wire pressing body head 1041 connected to the wire pressing body tail 1042 is equal to the diameter of the end of the wire pressing body head 1041 away from the wire pressing body tail 1042. Among them, the wire pressing body 104 is provided with a wire groove 1043, and the wire groove 1043 extends from the wire pressing body tail 1042 to the wire pressing body head 1041, and the wire groove 1043 is communicated with the inside of the terminal post body 102.

[0087] Among them, the head of the wire pressing body 104 is a cylindrical structure, and the tail of the wire pressing body 104 is a trumpet-shaped structure, which is convenient for storing the wire and can relatively reliably protect the wire, which is beneficial to further improving the reliability of the electrical connection between the terminal post 10 and another terminal post.

[0088] In addition, referring to Figure 1 It is understood that the middle part of the terminal post body 102 has a limiting boss 105, and the limiting boss 105 extends outward from the outer wall surface of the terminal post body 102.

[0089] This embodiment also discloses an electrical connector. Refer to Figures 2 - 5 and understand that, in this embodiment, the electrical connector is a vehicle body end electrical connector. The connector includes a pole mounting seat 20, and the pole mounting seat 20 is provided with a mounting hole 201. The electrical connector further includes the pole 10, a guiding groove 202, and an elastic member 30 as described above. The pole 10 passes through the mounting hole 201, the guiding groove 202 is provided on the side wall of the mounting hole 201, and the elastic member 30 is located within the mounting hole 201. Among them, the pole 10 includes a pole body 102. One end of the pole body 102 is an electrical contact end, and the other end is a wiring end. The pole 10 further includes a guiding foot 103. The guiding foot 103 is provided on the outer wall surface of the pole body 102 and extends outward along the radial direction of the pole body 102. When the guiding foot 103 moves into the guiding groove 202, the guiding foot 103 slides in the guiding groove 202, and the guiding foot 103 cooperates with the guiding groove 202 to define the rotation direction of the pole 10. The elastic member 30 is sleeved outside the pole body 102 and is located between the limiting boss 105 and the guiding foot 103. The elastic member 30 is used to drive the pole 10 to move along the rotation direction set by the guiding groove 202.

[0090] In this embodiment, the end face of the electrical contact end of the pole 10 has an arc portion 101. When the pole 10 is electrically connected to the end face of the pole of another electrical connector, regardless of whether the end face of the other electrical connector is an arc surface or a flat surface, when vibration occurs during the driving of the electric vehicle, the end faces of the two poles can still contact relatively reliably, and the end faces of the two poles are not easily separated instantaneously, which is beneficial to improving the reliability of the electrical connection. In addition, the cooperation between the guiding foot 103 and the guiding groove 202 can define the rotation direction of the pole 10, and the elastic member 30 drives the pole 10 to move along the rotation direction set by the guiding groove 202, so as to achieve the effect of cleaning the end face of the pole 10, which is beneficial to improving the reliability of the electrical connection between the pole 10 and another pole, and further improving the reliability of the electrical connection of the electrical connector including the pole 10.

[0091] Furthermore, the length direction of the guiding groove 202 forms an angle with the central axis of the pole 10, and the angle is 15°. In other alternative embodiments, the angle can take any other value between 13° and 17°.

[0092] Even further, refer to Figures 2 - 5It is understood that the terminal post mounting seat 20 includes a main board 203 and a cover plate 204, and the cover plate 204 is detachably connected to one side of the main board 203. The main board 203 includes a housing 2031 and an intermediate block 2032. An accommodation cavity (not labeled in the figure) is provided at one end of the housing 2031 facing the cover plate 204. The intermediate block 2032 is clamped in the accommodation cavity and is hermetically connected to the housing 2031. The mounting hole 201 includes a main board 203 mounting hole 2011 and a cover plate 204 mounting hole 2012 that are communicated with each other. The main board 203 mounting hole 2011 is provided in the main board 203, and the cover plate 204 mounting hole 2012 is provided in the cover plate 204. The guiding groove 202 is provided on the side wall of the cover plate 204 mounting hole 2012. Among them, the elastic member 30 is located in the main board 203 mounting hole 2011. A limiting groove 2013 is provided on the side wall of the main board 203 mounting hole 2011 (mainly reflected in Figure 4 ), the limiting groove 2013 is located at one end of the main board 203 mounting hole 2011 close to the cover plate 204 mounting hole 2012, one end of the limiting groove 2013 is adjacent to and communicated with the guiding groove 202, and the guiding foot 103 is clamped in the limiting groove 2013. In this way, by providing the limiting groove 2013, the guiding foot 103 is limited under normal conditions, ensuring that the guiding foot 103 can still return to the same fixed position after reciprocating rotational movement, which is beneficial to improving the accuracy of each reciprocating rotational movement of the terminal post.

[0093] Furthermore, the terminal post 10 is a low-voltage terminal post, and the electrical connector further includes a high-voltage terminal post 40. The high-voltage terminal post 40 has a wiring end and an electrical contact end. The wiring end of the high-voltage terminal post 40 is floatingly electrically connected to the high-voltage plug 3 through Figure 6 and Figure 7 the flexible conductive member 4 therein. The electrical contact end of the high-voltage terminal post 40 is floatingly electrically connected to the battery terminal electrical connector. Among them, the flexible conductive member 4 is made of a flexible conductive material.

[0094] The flexible conductive member 4 can be stretched, compressed and radially twisted, and can adapt to relative displacement changes in various angles such as axial and radial directions between structural connections, avoiding deterioration of electrical connection performance due to relative displacement changes. Therefore, it is beneficial to improve the reliability of the electrical connection between the high-voltage terminal post 40 and the high-voltage plug 3. Similarly, the reliability of the electrical connection between the electrical contact end of the high-voltage terminal post 40 and the battery terminal electrical connector is also relatively high.

[0095] Specifically, refer to Figure 6 and Figure 7It is understood that the flexible conductive member 4 has a first joint 41, a second joint 42 and a cavity 43. The two ends of the cavity 43 are respectively connected to the first joint 41 and the second joint 42. The first joint 41 is electrically connected to the wiring terminal of the high-voltage pole 40, and the second joint 42 is electrically connected to the high-voltage plug 3. A groove 401 is provided on the end face of the electrical contact end of the high-voltage pole 40. The groove 401 is recessed inward along the axial direction of the high-voltage pole 40. A conductive elastic member (not shown in the figure) is embedded in the groove 401, and the conductive elastic member protrudes from the end face of the electrical contact end of the high-voltage pole 40. The electrical contact end of the high-voltage pole 40 is floatingly electrically connected to the battery terminal electrical connector 2 through the conductive elastic member. In this embodiment, the conductive elastic member is a conductive spring.

[0096] In addition, this embodiment also discloses an electrical connection device. As Figure 6 and Figure 7 shown, the electrical connection device includes a battery terminal electrical connector 2, the vehicle body terminal electrical connector 1 as described above, a flexible conductive member 4 and a high-voltage plug 3. The electrical connection device further includes an insulating sleeve 5. The inside of the insulating sleeve 5 has a receiving cavity 51. The flexible conductive member 4 is located in the receiving cavity 51. The insulating sleeve 5 can protect the flexible conductive member 4, which is beneficial to further improving the reliability of the electrical connection.

[0097] This embodiment also discloses an electric vehicle, which includes a battery accommodating portion having the vehicle body terminal electrical connector as described above.

[0098] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A terminal post for an electrical connector, the terminal post having an electrical contact end, characterized in that, the end face of the electrical contact end has an outwardly convex arc portion; the terminal post includes a terminal post body, one end of the terminal post body is the electrical contact end and the other end is a wiring end; the terminal post further includes a guiding foot, the guiding foot is provided on the outer wall surface of the terminal post body and extends outward along the radial direction of the terminal post body; the terminal post is used to pass through the mounting hole of the terminal post mounting seat, and the guiding foot is used to slide in the guiding groove on the side wall of the mounting hole, and the guiding foot and the guiding groove cooperate to define the rotation direction of the terminal post; the range of the radius of the arc of the arc portion is 8-10 mm.

2. The terminal post according to claim 1, characterized in that, the arc portion is symmetrical about the central axis of the terminal post.

3. The terminal post according to claim 1, characterized in that, the guiding foot is located on the end face of the wiring end.

4. The terminal post according to claim 1, characterized in that, the guiding foot and the terminal post body are integrally formed.

5. The terminal post according to claim 1, characterized in that, the terminal post further has a wire pressing body, the wire pressing body is connected to the wiring end and is located on the side of the guiding foot away from the terminal post body; the wire pressing body has a connected wire pressing body head and a wire pressing body tail, one end of the wire pressing body head away from the wire pressing body tail is connected to the wiring end, the diameter of one end of the wire pressing body tail connected to the wire pressing body head is smaller than the diameter of the end of the wire pressing body tail away from the wire pressing body head, and the diameter of one end of the wire pressing body head connected to the wire pressing body tail is equal to the diameter of the end of the wire pressing body head away from the wire pressing body tail; wherein, the wire pressing body is provided with a wire groove, the wire groove extends from the wire pressing body tail to the wire pressing body head, and the wire groove is communicated with the inside of the terminal post body.

6. The terminal post according to claim 1, characterized in that, the middle of the terminal post body has a limiting boss, and the limiting boss extends outward from the outer wall surface of the terminal post body.

7. An electrical connector includes a terminal post mounting seat, and the terminal post mounting seat is provided with a mounting hole, characterized in that, the electrical connector further includes: the terminal post according to claim 1, the guiding groove; an elastic member, the elastic member is located in the mounting hole; wherein, the terminal post includes a terminal post body, one end of the terminal post body is the electrical contact end and the other end is a wiring end, and the terminal post further includes a guiding foot, the guiding foot is provided on the outer wall surface of the terminal post body and extends outward along the radial direction of the terminal post body; when the guiding foot moves into the guiding groove, the guiding foot slides in the guiding groove; the elastic member is sleeved outside the terminal post body, and the elastic member is used to drive the terminal post to move along the rotation direction set by the guiding groove.

8. The electrical connector according to claim 7, characterized in that, The pole column is a low-voltage pole column. The electrical connector further includes a high-voltage pole column which has a wiring terminal and an electrical contact terminal. The wiring terminal of the high-voltage pole column is floatingly electrically connected to a high-voltage plug through a flexible conductive member, and the electrical contact terminal of the high-voltage pole column is floatingly electrically connected to the battery terminal electrical connector; Wherein, the flexible conductive member is made of a flexible conductive material.

9. An electrical connection device, characterized in that, it includes a battery terminal electrical connector and the electrical connector as claimed in claim 7 or 8.

10. An electric vehicle, including a battery accommodating portion, characterized in that, the battery accommodating portion has the electrical connector as claimed in claim 7 or 8.

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