Voltage collection terminal and connection structure of voltage collection terminal

Abstract

The utility model belongs to circuit device technical field discloses a voltage acquisition terminal and voltage acquisition terminal's connecting structure. Voltage acquisition terminal includes the pressure joint spare and the plug -in spare, and the pressure joint spare includes the wrapping part and links to the two pressure joint parts of wrapping part both sides. The wrapping part and two pressure joint parts surround and set up and form the card and set high voltage wire harness pressure joint cavity, and the wrapping part and two pressure joint parts are wrapped in the outside of high voltage wire harness, and the pressure joint part is set up on high voltage wire harness. The plug -in spare includes the plug -in body and the two surrounding fender parts that divide in the plug -in body both sides, and the plug -in body is connected with the wrapping part. The plug -in body and two surrounding fender parts surround and set up and form the limit insertion slot for the plug -in connection plug -in, and the one end of connection plug -in is connected on copper bar away from the plug -in body. Use this voltage acquisition terminal to connect high voltage wire harness and copper bar, and the installation procedure is simple, and the operation is convenient, can reduce the labor quantity, can also guarantee the stability of voltage acquisition terminal and copper bar between the connection simultaneously, guarantees the normal use of circuit device.

Description

Technical Field

[0001] This utility model relates to the field of circuit device technology, and in particular to a voltage acquisition terminal and a connection structure for the voltage acquisition terminal. Background Technology

[0002] In recent years, the new energy sector has developed rapidly, and electric vehicles have also entered a stage of high-speed development. Key circuit components of electric vehicles include electronic unit boxes, high-voltage electrical boxes, and battery packs. The high-voltage wiring harnesses of the electronic unit boxes or high-voltage electrical boxes are connected to the copper busbars of the battery pack via voltage acquisition terminals.

[0003] In existing technologies, most voltage acquisition terminals typically have a connection hole at the head and a cylindrical tail. The high-voltage wire harness passes through the cylinder. When connecting the voltage acquisition terminal to the copper busbar, the head of the voltage acquisition terminal is placed against the copper busbar, and then a screw is passed through the connection hole and the copper busbar, and threaded into a nut. Using this type of voltage acquisition terminal to connect the high-voltage wire harness and the copper busbar is cumbersome, requiring multiple tightening of the screw and nut. Furthermore, the tightening torque must be strictly controlled. Excessive tightening torque may cause the screw to break or damage the assembly; insufficient tightening torque may result in a loose screw connection, causing the voltage acquisition terminal to loosen or fall off, affecting the normal operation of circuit components, and in severe cases, causing the entire circuit to malfunction. Utility Model Content

[0004] The purpose of this utility model is to provide a voltage acquisition terminal and a connection structure for the voltage acquisition terminal. The installation process is simple and easy to operate, which can reduce the amount of labor. At the same time, it can also ensure the stability of the connection between the voltage acquisition terminal and the copper busbar, and ensure the normal use of the circuit devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Firstly, a voltage acquisition terminal is provided, comprising:

[0007] A crimping component includes a wrapping portion and two crimping portions. The two crimping portions are connected to both sides of the wrapping portion along the width direction. The wrapping portion and the two crimping portions surround a crimping cavity. The crimping cavity is configured to hold a high-voltage wire harness. The wrapping portion and the two crimping portions can wrap around the outside of the high-voltage wire harness, and the crimping portions are pressed onto the high-voltage wire harness to make the crimping component electrically connected to the high-voltage wire harness.

[0008] A connector includes a connector body and two enclosure portions. The connector body is connected to the enclosure portion. The two enclosure portions are disposed on both sides of the connector body along the width direction. The connector body and the two enclosure portions form a limiting slot. The limiting slot is configured for inserting a connecting plug to make the connecting plug electrically connected to the connector. The end of the connecting plug away from the connector body is connected to a copper busbar.

[0009] Optionally, the enclosure includes a first plate segment, a second plate segment, and a third plate segment connected in sequence. The end of the first plate segment facing away from the second plate segment is connected to the plug-in body. The first plate segment extends along the X direction, the second plate segment extends along the Y direction and is located above the limiting slot, and the third plate segment extends along the X direction and extends into the limiting slot. The end of the third plate segment facing away from the second plate segment abuts against the connecting plug. The X direction and the Y direction are perpendicular to each other.

[0010] Optionally, the first plate segment and the plug-in body, the first plate segment and the second plate segment, and the second plate segment and the third plate segment are all connected by a rounded transition.

[0011] Optionally, the voltage acquisition terminal further includes multiple support members, all of which are disposed within the limiting slot and extend along the X direction. The support members abut against the side of the connecting plug opposite to the third plate segment, so that the connecting plug is limited between the third plate segment and the support members.

[0012] Optionally, the voltage acquisition terminal further includes a connected abutment plate and a guide plate. The guide plate and the plug-in body are spaced apart in the limiting slot along the X direction. One end of the guide plate opposite to the abutment plate is connected to the lower end of the plug-in body. The guide plate extends along the extension direction of the limiting slot. The connecting plug is attached to the side of the guide plate opposite to the plug-in body. The abutment plate extends in the horizontal direction and can abut against the upper end of the connecting plug.

[0013] Optionally, the guide plate is provided with a limiting protrusion, which can be engaged in the limiting hole of the connecting plug.

[0014] Optionally, the limiting protrusion has a guide slope on the side facing the connecting plug, and the thickness between the guide slope and the guide plate gradually increases vertically.

[0015] Optionally, a pressing plate is provided at one end of the abutment plate away from the guide plate, and the pressing plate extends vertically.

[0016] Secondly, a connection structure for a voltage acquisition terminal is provided, including a connector and a voltage acquisition terminal as described above, wherein one end of the connector is connected to the copper busbar and the other end is inserted into the limiting slot of the voltage acquisition terminal.

[0017] Optionally, the connector includes a connecting part and an insertion part connected together. The connecting part is attached to and connected to the copper busbar. The insertion part extends vertically and can be inserted into the limiting slot. The insertion part has a limiting hole, and the limiting protrusion of the voltage acquisition terminal can be locked in the limiting hole.

[0018] The beneficial effects of this utility model are:

[0019] This utility model provides a voltage acquisition terminal and a connection structure for the voltage acquisition terminal. The voltage acquisition terminal includes a crimping member and a plug-in member. When connecting a high-voltage wire harness and a copper busbar, the high-voltage wire harness is clamped in the crimping cavity, and the two crimping parts are pressed so that the two crimping parts can be pressed onto the high-voltage wire harness circumferentially. At this time, the wrapping part and the two crimping parts wrap around the high-voltage wire harness, thereby realizing the electrical connection between the high-voltage wire harness and the crimping member. Then, the limiting slot of the plug-in member is aligned with the connecting plug connected to the copper busbar, and the plug-in member is moved in the direction close to the connecting plug, so that the connecting plug is inserted into the limiting slot, realizing the electrical connection between the connecting plug and the plug-in member. Thus, the voltage acquisition terminal is connected to the copper busbar through the connecting plug. By using crimp connectors and plug-in connectors, the high-voltage wire harness is simply connected to the crimp connector and the connector is inserted into the limiting slot. The installation process is simple and convenient, eliminating the need for repeated tightening of screws and nuts, thus reducing labor. Furthermore, since the connector and limiting slot are interlocked instead of screws and nuts, the connector is locked in the limiting slot, ensuring the connection strength between the voltage acquisition terminal and the connector. This, in turn, ensures the stability of the connection between the voltage acquisition terminal and the copper busbar, guaranteeing the normal operation of the circuit components. Attached Figure Description

[0020] Figure 1 This is a first view of the voltage acquisition terminal provided in an embodiment of the present invention;

[0021] Figure 2 This is a second view of the voltage acquisition terminal provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection structure of the voltage acquisition terminal provided in this embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the connector provided in this embodiment of the utility model.

[0024] In the picture:

[0025] 100. Copper busbar; 200. High-voltage wiring harness;

[0026] 1. Crimping component; 11. Wrapping part; 12. Crimping part; 121. Crimping cavity;

[0027] 2. Connector; 21. Connector body; 22. Enclosure section; 221. First plate segment; 222. Second plate segment; 223. Third plate segment; 23. Limiting slot;

[0028] 3. Support components;

[0029] 4. Abutment plate;

[0030] 5. Guide plate;

[0031] 6. Limiting protrusion;

[0032] 7. Press plate;

[0033] 8. Wire wrapping components;

[0034] 9. Connecting plug; 91. Connecting part; 92. Insertion part; 921. Limiting hole. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] Example 1

[0040] This embodiment provides a voltage acquisition terminal, such as... Figures 1 to 3 As shown, using this voltage acquisition terminal to connect the high-voltage harness 200 and the copper busbar 100 is simple and easy to operate, which can reduce the amount of labor. At the same time, it can also ensure the stability of the connection between the voltage acquisition terminal and the copper busbar 100, and ensure the normal use of the circuit components.

[0041] like Figures 1 to 3 As shown, the voltage acquisition terminal includes a crimping member 1 and a plug-in member 2. The crimping member 1 includes a wrapping portion 11 and two crimping portions 12. The two crimping portions 12 are connected to both sides of the wrapping portion 11 along the width direction, and the wrapping portion 11 and the two crimping portions 12 form a crimping cavity 121. The crimping cavity 121 is configured to hold a high-voltage wire harness 200. The wrapping portion 11 and the two crimping portions 12 can wrap around the outside of the high-voltage wire harness 200, and the crimping portions 12 are pressed onto the high-voltage wire harness 200, so that the crimping member 1 is electrically connected to the high-voltage wire harness 200. The plug-in member 2 includes a plug-in body 21 and two retaining portions 22. The plug-in body 21 is connected to the crimping member 1. The two retaining portions 22 are respectively disposed on both sides of the plug-in body 21 along the width direction, and the plug-in body 21 and the two retaining portions 22 form a limiting slot 23. The limiting slot 23 is configured to insert the connector 9 so that the connector 9 is electrically connected to the connector 2, and the end of the connector 9 opposite to the connector body 21 is connected to the copper busbar 100.

[0042] When connecting the high-voltage harness 200 and the copper busbar 100, the high-voltage harness 200 is clamped in the crimping cavity 121, and the two crimping parts 12 are pressed so that the two crimping parts 12 can be pressed onto the high-voltage harness 200 circumferentially. At this time, the wrapping part 11 and the two crimping parts 12 wrap around the high-voltage harness 200, thereby realizing the energized connection between the high-voltage harness 200 and the crimping member 1. Then, the limiting slot 23 of the plug-in 2 is aligned with the connecting plug 9 connected to the copper busbar 100, and the plug-in 2 is moved in the direction close to the connecting plug, so that the connecting plug 9 is inserted into the limiting slot 23, realizing the energized connection between the connecting plug 9 and the plug-in 2, thereby connecting the voltage acquisition terminal to the copper busbar 100 through the connecting plug 9. By setting up crimping piece 1 and plug-in piece 2, it is only necessary to connect the high-voltage wire harness 200 to crimping piece 1 and insert the connector 9 into the limiting slot 23. The installation process is simple and convenient, eliminating the need for repeated tightening of screws and nuts, thus reducing labor. At the same time, since the connector 9 and the limiting slot 23 are plugged into each other instead of screws and nuts, the connector 9 is locked in the limiting slot 23, which can ensure the connection strength between the voltage acquisition terminal and the connector 9, thereby ensuring the stability of the connection between the voltage acquisition terminal and the copper busbar 100 and ensuring the normal use of the circuit components.

[0043] It should be noted that the crimping part 1 and the plug part 2 of the voltage acquisition terminal are integrally formed, and the voltage acquisition terminal as a whole is made of a conductive metal material, such as copper.

[0044] Optionally, such as Figures 1 to 3 As shown, the enclosure portion 22 includes a first plate segment 221, a second plate segment 222, and a third plate segment 223 that are bent and connected in sequence. The end of the first plate segment 221 facing away from the second plate segment 222 is connected to the insertion body 21, and the first plate segment 221 extends along the X direction. The second plate segment 222 extends along the Y direction and is located above the limiting slot 23, and the third plate segment 223 extends along the X direction and extends into the limiting slot 23. The end of the third plate segment 223 facing away from the second plate segment 222 abuts against the connecting plug 9, and the X direction and Y direction are perpendicular to each other. When the connector 9 is inserted into the limiting slot 23, the first plate segment 221 of the two blocking parts 22 respectively blocks the two sides of the connector 9, and at the same time, the third plate segment 223 of the two blocking parts 22 presses against the side wall of the connector 9, so that the third plate segment 223 and the connector 9 abut against each other, thereby making the connector 9 and the plug-in 2 electrically connected. The third plate segment 223 pressing on the connector 9 helps to improve the stability of the connection between the connector 9 and the plug-in 2 and prevents the voltage acquisition terminal from becoming loose and falling off.

[0045] In this embodiment, the first plate segment 221 and the plug-in body 21, the first plate segment 221 and the second plate segment 222, and the second plate segment 222 and the third plate segment 223 are all connected by arc transitions. This can avoid stress concentration in the transition area, prevent the enclosure part 22 from breaking and failing, and enhance the overall structural strength of the enclosure part 22. In addition, it can also avoid the generation of metal free particles from wear between the transition area and the connecting plug 9, avoid affecting the stability of the connection between the voltage acquisition terminal and the connecting plug 9, and also avoid scratching the staff.

[0046] Optionally, such as Figure 2 As shown, the voltage acquisition terminal also includes multiple support members 3. All support members 3 are disposed within the limiting slot 23 and extend along the X direction. The support members 3 abut against the side of the connector 9 opposite to the third plate segment 223, so that the connector 9 is confined between the third plate segment 223 and the support members 3. When the connector 9 is inserted into the limiting slot 23, the third plate segment 223 and the support members 3 abut against the two side walls of the connector 9 respectively, thus confining the connector 9 between the third plate segment 223 and the support members 3. This increases the connection strength between the voltage acquisition terminal and the connector 9, thereby ensuring the connection stability between the high-voltage harness 200 and the copper busbar 100.

[0047] In this embodiment, two support members 3 are provided. In other embodiments, other numbers of support members 3 may be provided as needed, and this is not limited here.

[0048] Optionally, such as Figures 1 to 3 As shown, the voltage acquisition terminal also includes a connected abutment plate 4 and a guide plate 5. The guide plate 5 and the insertion body 21 are spaced apart in the limiting slot 23 along the X direction, and the end of the guide plate 5 opposite to the abutment plate 4 is connected to the lower end of the insertion body 21. The guide plate 5 extends along the extension direction of the limiting slot 23, and the connecting plug 9 is attached to the side of the guide plate 5 opposite to the insertion body 21. The abutment plate 4 extends horizontally and can abut against the upper end of the connecting plug 9. By setting the guide plate 5, the connecting plug 9 can be supported, and the contact area between the connecting plug 9 and the voltage acquisition terminal can be increased to ensure the stability of the electrical connection between the two. The abutment plate 4 abuts against the upper end of the connecting plug 9, which can control the insertion position of the connecting plug 9 in the limiting slot 23 and prevent the upper end of the connecting plug 9 from dislodging from the limiting slot 23.

[0049] Optionally, such as Figures 2 to 4 As shown, the guide plate 5 is provided with a limiting protrusion 6, which can be locked into the limiting hole 921 of the connector 9. By providing the limiting protrusion 6, the connection strength between the connector 9 and the guide plate 5 of the voltage acquisition terminal can be increased, thereby ensuring the connection stability between the voltage acquisition terminal and the copper busbar 100, which is beneficial to ensuring the normal use of the circuit components.

[0050] In this embodiment, a guide slope is provided on the side of the limiting protrusion 6 facing the connecting plug 9, and the thickness between the guide slope and the guide plate 5 gradually increases vertically. When the connecting plug 9 is inserted into the limiting slot 23, the guide slope can provide guidance and alignment, guiding the limiting protrusion 6 to be engaged in the limiting hole 921, thus improving the assembly accuracy of the voltage acquisition terminal.

[0051] Optionally, such as Figures 2 to 4 As shown, a pressing plate 7 is provided at the end of the abutment plate 4 away from the guide plate 5, and the pressing plate 7 extends vertically. When it is necessary to separate the high-voltage wire harness 200 and the copper busbar 100, the pressing plate 7 is pushed in the direction close to the limiting slot 23, so that the limiting protrusion 6 separates from the limiting hole 921. At the same time, the voltage acquisition terminal is moved in the direction away from the connecting plug 9, so as to separate the voltage acquisition terminal from the connecting plug 9, thereby realizing the separation of the high-voltage wire harness 200 and the copper busbar 100. The structure is simple and the operation is convenient.

[0052] In this embodiment, as Figure 1 and Figure 2 As shown, the voltage acquisition terminal also includes a wire wrapping component 8. The wire wrapping component 8 is connected to the end of the wrapping part 11 opposite to the plug-in body 21 and is used to wrap the high-voltage wire harness 200. When the high-voltage wire harness 200 is led out after being crimped by the crimping component 1, the led-out portion of the high-voltage wire harness 200 can be wrapped by the wire wrapping component 8, which serves to restrain and organize the high-voltage wire harness 200, preventing the high-voltage wire harness 200 from becoming messy.

[0053] Example 2

[0054] This embodiment provides a connection structure for voltage acquisition terminals, such as... Figure 2 and Figure 3 As shown, it includes a connecting plug 9 and a voltage acquisition terminal as described in Embodiment 1. One end of the connecting plug 9 is connected to the copper busbar 100, and the other end is inserted into the limiting slot 23 of the voltage acquisition terminal. This connection structure has a simple structure, which can quickly connect the voltage acquisition terminal and the connecting plug 9, thereby quickly realizing the connection between the high-voltage harness 200 and the copper busbar 100. The installation process is simple, the operation is convenient, and it can improve work efficiency.

[0055] Optionally, such as Figures 2 to 4As shown, connector 9 includes a connecting part 91 and an insertion part 92 connected together. The connecting part 91 is attached to and connected to the copper busbar 100, and the insertion part 92 extends vertically and can be inserted into the limiting slot 23. The insertion part 92 has a limiting hole 921, and the limiting protrusion 6 of the voltage acquisition terminal can be locked in the limiting hole 921. By setting the limiting hole 921, the connection strength between connector 9 and voltage acquisition terminal can be increased, thereby ensuring the connection stability between voltage acquisition terminal and copper busbar 100, which is beneficial to ensuring the normal use of circuit devices.

[0056] In this embodiment, the connecting part 91 is welded to the copper busbar 100. In other embodiments, other connection methods can be selected to connect the copper busbar 100 and the connecting part 91 according to actual needs, which are not limited here.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A voltage acquisition terminal, characterized in that, include: The crimping member (1) includes a wrapping part (11) and two crimping parts (12). The two crimping parts (12) are connected to both sides of the wrapping part (11) along the width direction. The wrapping part (11) and the two crimping parts (12) surround to form a crimping cavity (121). The crimping cavity (121) is configured to hold a high-voltage wire harness (200). The wrapping part (11) and the two crimping parts (12) can wrap around the outside of the high-voltage wire harness (200), and the crimping parts (12) are pressed onto the high-voltage wire harness (200) so that the crimping member (1) is electrically connected to the high-voltage wire harness (200). The connector (2) includes a connector body (21) and two enclosure parts (22). The connector body (21) is connected to the enclosure part (11). The two enclosure parts (22) are respectively disposed on both sides of the connector body (21) along the width direction. The connector body (21) and the two enclosure parts (22) form a limiting slot (23). The limiting slot (23) is configured to insert a connecting plug (9) so that the connecting plug (9) is electrically connected to the connector (2). The end of the connecting plug (9) away from the connector body (21) is connected to the copper busbar (100).

2. The voltage acquisition terminal according to claim 1, characterized in that, The enclosure (22) includes a first plate segment (221), a second plate segment (222), and a third plate segment (223) connected in sequence. The end of the first plate segment (221) facing away from the second plate segment (222) is connected to the plug-in body (21). The first plate segment (221) extends along the X direction. The second plate segment (222) extends along the Y direction and is located above the limiting slot (23). The third plate segment (223) extends along the X direction and extends into the limiting slot (23). The end of the third plate segment (223) facing away from the second plate segment (222) abuts against the connecting plug (9). The X direction and the Y direction are perpendicular to each other.

3. The voltage acquisition terminal according to claim 2, characterized in that, The first plate segment (221) and the plug-in body (21), the first plate segment (221) and the second plate segment (222), and the second plate segment (222) and the third plate segment (223) are all connected by a circular arc transition.

4. The voltage acquisition terminal according to claim 2, characterized in that, The voltage acquisition terminal also includes multiple support members (3), all of which are disposed in the limiting slot (23) and extend along the X direction. The support member (3) and the connecting plug (9) abut against each other on the side away from the third plate segment (223) so that the connecting plug (9) is limited between the third plate segment (223) and the support member (3).

5. The voltage acquisition terminal according to any one of claims 1-4, characterized in that, The voltage acquisition terminal also includes a connected abutment plate (4) and a guide plate (5). The guide plate (5) and the plug-in body (21) are spaced apart in the limiting slot (23) along the X direction. One end of the guide plate (5) away from the abutment plate (4) is connected to the lower end of the plug-in body (21). The guide plate (5) extends along the extension direction of the limiting slot (23). The connecting plug (9) is attached to the side of the guide plate (5) away from the plug-in body (21). The abutment plate (4) extends in the horizontal direction and can abut against the upper end of the connecting plug (9).

6. The voltage acquisition terminal according to claim 5, characterized in that, The guide plate (5) is provided with a limiting protrusion (6), which can be locked in the limiting hole (921) of the connecting plug (9).

7. The voltage acquisition terminal according to claim 6, characterized in that, The limiting protrusion (6) has a guide slope on the side facing the connecting plug (9), and the thickness between the guide slope and the guide plate (5) gradually increases vertically.

8. The voltage acquisition terminal according to claim 7, characterized in that, The abutment plate (4) is provided with a pressing plate (7) at one end away from the guide plate (5), and the pressing plate (7) extends vertically.

9. The connection structure of the voltage acquisition terminal, characterized in that, Includes a connector (9) and a voltage acquisition terminal as described in any one of claims 1-8, wherein one end of the connector (9) is connected to the copper busbar (100) and the other end is inserted into the limiting slot (23) of the voltage acquisition terminal.

10. The connection structure of the voltage acquisition terminal according to claim 9, characterized in that, The connector (9) includes a connecting part (91) and an insert part (92) connected together. The connecting part (91) is attached to and connected to the copper busbar (100). The insert part (92) extends vertically and can be inserted into the limiting slot (23). The insert part (92) has a limiting hole (921). The limiting protrusion (6) of the voltage acquisition terminal can be locked in the limiting hole (921).

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