Switching structure and high-voltage-resistant and high-current-resistant external switching measurement device

Abstract

The invention discloses a switching structure and a high-voltage-resistant large-current external switching measurement device, and relates to the technical field of voltage and current acquisition, the switching structure comprises a shell, the shell is internally provided with a plurality of electrical connection paths, and the electrical connection paths penetrate through the shell; external connection holes are formed in the positions, corresponding to the electrical connection paths, of the shell; at least part of the conductor on the electrical connection path is exposed in the projection range of the external connection hole; the side wall of the data acquisition instrument is connected with a plurality of groups of measurement ports; the connecting line comprises a measuring line and a clip, one end of the measuring line is connected with the measuring port, and the other end is fixed with the clip; and the clip is fixedly connected with the conductor exposed in the external hole. According to the invention, the problem that the measurement precision is influenced by position offset which is easily caused when a clamping method is adopted to carry out data acquisition in order to not damage a wire harness in the existing voltage and current acquisition equipment is solved.

Description

Technical Field

[0001] The invention relates to the technical field of voltage and current acquisition, and in particular to a switching structure and a high-voltage and high-current resistant external switching measuring device. Background Art

[0002] Automotive voltage and current acquisition equipment is a key tool in the testing of high-voltage systems of new energy vehicles to ensure the safety, performance and battery life of the vehicle. These devices can accurately measure the voltage and current in high-voltage circuits, helping engineers evaluate the electrical performance of the vehicle under different operating conditions and detect possible safety hazards. Voltage and current acquisition equipment usually includes data acquisition modules, current sensors, voltage sensors, etc. They can be independent modules or integrated into the battery management system (BMS).

[0003] At present, many voltage and current acquisition devices can only use the external current clamp method to avoid damaging the measured wiring harness. This external current clamp measurement method will affect the acquisition accuracy due to the offset or even loosening of the acquisition position when the measured object vibrates. Summary of the invention

[0004] In view of the problem that the above-mentioned existing voltage and current acquisition equipment uses a clamping method to collect data in order not to damage the wiring harness, which is prone to position deviation and affects the measurement accuracy, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide an external high-voltage and high-current adapter, which avoids damage to the original high-voltage wiring harness and electrodes, has a large terminal contact area, effective and firm contact, and prevents false contact and even loose joints caused by vibration, which affects the measurement.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a switching structure, which includes a shell, in which a plurality of electrical connection paths are opened, and the electrical connection paths pass through the shell; external connection holes are respectively provided on the shell at positions corresponding to the electrical connection paths; at least part of the conductors on the electrical connection paths are exposed within the projection range of the external connection holes.

[0007] As a preferred solution of the switching structure of the present invention, the electrical connection path includes a wire path and an electrode path, and the electrode path is vertically connected to the wire path.

[0008] As a preferred solution of the switching structure of the present invention, wherein: the axes of the open ends of several of the wire paths located on one side wall of the shell are aligned, and the plane formed by the axes is the wire plane; the axes of the open ends of several of the electrode paths located on the other side wall of the shell are aligned, and the plane formed by the axes is the electrode plane; the wire plane and the electrode plane are perpendicular to each other.

[0009] As a preferred solution of the switching structure of the present invention, the connection point between the electrode path and the wire path is an external connection point, and the external connection hole is connected to the external connection point.

[0010] As a preferred solution of the adapter structure of the present invention, the axis of the external connection hole is located in the plane of the conductor, and the axis is parallel to the axis line connecting the open end of the conductor path located on one side wall of the shell.

[0011] As a preferred solution of the switching structure of the present invention, one end of the conductor extends out of the shell from the opening of the wire path, and the other end of the conductor extends out of the shell from the opening of the electrode path.

[0012] As a preferred solution of the adapter structure of the present invention, one end of the conductor is columnar and the other end is plate-shaped, and the columnar end and the plate-shaped end are fixed perpendicularly to each other; there is a length difference between the columnar ends of two adjacent groups of conductors, and the plate-shaped ends of the conductors connected thereto have the same length.

[0013] As a preferred solution of the transition structure of the present invention, the columnar end and the plate-shaped end are detachably connected via a fastener, the fastener is located on the external connection point, and the fastener can be placed in the external connection hole.

[0014] In order to solve the above technical problems, the present invention also provides the following technical solutions: a high-voltage and high-current resistant external transfer measuring device, which includes the above-mentioned transfer structure and also includes a data acquisition instrument, and the side wall of the data acquisition instrument is connected to a plurality of groups of measurement ports; a connecting line, including a measuring line and a clip, one end of the measuring line is connected to the measurement port, and the other end is fixed to the clip; the clip is connected and fixed to the conductor exposed in the external connection hole.

[0015] As a preferred solution of the high-voltage and high-current resistant external switching measuring device of the present invention, when the clamp is connected to the conductor, the clamping end portion thereof can cooperate and extend into the external connection hole.

[0016] Beneficial effects of the present invention:

[0017] The present invention converts the original integrated high-voltage wire harness into a segmented type to achieve quick connection with a third-party measuring wire, and seals the internal connection end through the shell to achieve reliable connection of the high-voltage wire harness and prevent accidents such as sparking, flame retardancy, and high-voltage breakdown.

[0018] By setting the external connection hole, flexible fixation with the data acquisition instrument can be achieved, and it can also facilitate the connection and maintenance of cables inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 It is a cross-sectional view of the shell of the switching structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the intersection of the conductor plane and the electrode plane of the switching structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the relative positions of the electrical connection path and the external connection hole of the adapter structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the overall structure of the switching structure of the present invention.

[0024] Figure 5 It is a schematic diagram of the high pressure resistant shell structure of the transfer structure of the present invention.

[0025] Figure 6 It is a cross-sectional view of the high-pressure resistant shell of the transition structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the sealing cover structure of the transfer structure of the present invention.

[0027] Figure 8 It is a schematic diagram of the connector assembly and connector assembly connection of the adapter structure of the present invention.

[0028] Fig. 9 It is a schematic diagram of the structure of the electrode assembly of the transition structure of the present invention.

[0029] Fig.10 It is a schematic diagram of the overall structure of the high-voltage and high-current resistant external transfer measuring device of the present invention.

[0030] Fig.11 The figure is a schematic diagram of the connection between the clip and the conductor of the high-voltage and high-current resistant external transfer measuring device of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Example 1

[0036] Reference Figure 1 to Figure 4 , which is the first embodiment of the present invention, provides a shell 400, in which a plurality of electrical connection paths O are opened, and the electrical connection paths penetrate the shell 400; external connection holes 401 are respectively provided on the shell 400 at positions corresponding to the electrical connection paths O; at least part of the conductor 500 on the electrical connection paths O is exposed within the projection range of the external connection holes 401.

[0037] There are preferably two electrical connection paths O, corresponding to the positive and negative electrodes of the unit under test.

[0038] Each electrical connection path O includes a conductor path O1 and an electrode path O2. The electrode path O2 is vertically connected to the conductor path O1, preferably forming an "L"-shaped through hole.

[0039] Several wire paths O1 are located at the open ends of the side wall of one side of the shell 400, and the axes are aligned, and the plane formed by the axes is the wire plane A; several electrode paths O2 are located at the open ends of the other side wall of the shell 400, and the axes are aligned, and the plane formed by the axes is the electrode plane B; the wire plane A and the electrode plane B are perpendicular to each other.

[0040] The connection point between the electrode path O2 and the conductor path O1 is an external connection point D, and the external connection hole 401 is connected to the external connection point D.

[0041] The conductor path O1 and the electrode path O2 are respectively an "L"-shaped vertical segment and a horizontal segment, and the external connection point D is located at the junction of the vertical segment and the horizontal segment.

[0042] The axis Z of the external hole 401 is located in the conductor plane A, and the axis Z is parallel to the axis line X of the opening end of the conductor path O1 located on one side wall of the housing 400 .

[0043] One end of the conductor 500 extends out of the housing 400 from the opening of the wire path O1 , and the other end of the conductor 500 extends out of the housing 400 from the opening of the electrode path O2 .

[0044] One end of the conductor 500 is columnar and the other end is plate-shaped, and the columnar end and the plate-shaped end are fixed perpendicularly to each other, wherein the columnar end is placed in the wire path O1 and the plate-shaped end is placed in the electrode path O2; there is a length difference between the columnar ends of two adjacent groups of conductors 500, and the plate-shaped ends of the conductors 500 connected to them have the same length.

[0045] Furthermore, among the two electrical connection paths O, preferably, the length of the upper conductor path O1 is shorter than that of the lower conductor path O1.

[0046] The columnar end and the plate-shaped end are detachably connected via a fastener, the fastener is located on the external connection point D, and the fastener can be matched and placed in the external connection hole 401.

[0047] Example 2

[0048] Reference Figures 1 to 9 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the shell 400 includes a high-pressure resistant shell 100, and a first joint hole 101 and a second joint hole 102 are opened on the outer wall of one side of the high-pressure resistant shell 100.

[0049] The first connector hole 101 and the second connector hole 102 are one side openings of two electrical connection paths O that are preferably provided.

[0050] The outer wall on the other side of the high-voltage shell 100 is also provided with a first electrode hole 103 and a second electrode hole 104 . The first electrode hole 103 and the second electrode hole 104 are openings on the other side of the high-voltage shell 100 . The first connector hole 101 is connected to the first electrode hole 103 , and the second connector hole 102 is connected to the second electrode hole 104 .

[0051] Among them, the high-voltage resistant shell 100 is made of flame-retardant material, with silver conductive connecting plates inside and a rounded corner design at the metal bend to prevent heat accumulation at the metal bend under high voltage and high current conditions, resulting in failure and damage.

[0052] The joint assembly 200 includes a first joint 201 and a second joint 202 , and the first joint 201 and the second joint 202 are installed in the first joint hole 101 and the second joint hole 102 respectively.

[0053] The first connector 201 and the second connector 202 are both made of copper and silver-plated materials, and have the functions of low impedance, high voltage and high current resistance, and low heat generation.

[0054] The electrode assembly 300 includes a first electrode 301 and a second electrode 302 . The first electrode 301 and the second electrode 302 are installed in the first electrode hole 103 and the second electrode hole 104 , respectively.

[0055] Furthermore, the joint assembly 200 and the electrode assembly 300 together form a conductor 500 .

[0056] Among them, the first electrode 301 and the second electrode 302 are made of silver-plated copper, have low impedance and can withstand current shocks of up to 1000A; the electrode assembly 300 is deliberately bent in a zigzag shape, mainly because the electrodes of the samples to be connected have a certain height difference, but are close to a horizontal plane, so the electrodes cannot be arranged in parallel up and down.

[0057] Furthermore, the zigzag shape is used to avoid interference with the joints of the sample. At the same time, the two electrodes are arranged in a unified horizontal plane to better fit the joints of the test piece. The width and spacing of the two electrodes are adjustable, and the height can be fine-tuned to ensure a tight connection with the joint section of the test piece. This is mainly to avoid interference with the sample. At the same time, when arranged horizontally in parallel, it can better adapt to the size of the sample connection post.

[0058] Furthermore, a first connection hole 101a and a second connection hole 102a are provided in the high pressure resistant shell 100. The first connection hole 101a and the second connection hole 102a are connected to the first joint hole 101 and the second joint hole 102 respectively, and their axes coincide with each other.

[0059] The first connection hole 101a and the second connection hole 102a are both parts of the two wire paths O1.

[0060] The inner diameter of the first connection hole 101a is smaller than that of the first joint hole 101, and the inner diameter of the second connection hole 102a is smaller than that of the second joint hole 102, so as to wrap the joint assembly 200 more tightly.

[0061] The first electrode hole 103 and the second electrode hole 104 are communicated with the first connection hole 101 a and the second connection hole 102 a , respectively.

[0062] The first electrode hole 103 and the second electrode hole 104 are both parts of the two electrode paths O2.

[0063] Reference Figure 6, wherein the upper portion of the first electrode hole 103 is connected to the lower portion of the first connection hole 101 a , so that the lower end surface of the first connector 201 is connected and fixed to the first electrode 301 .

[0064] Furthermore, the lower half of the second electrode hole 104 is connected to the upper half of the second connection hole 102 a , so that the upper end surface of the second connector 202 is connected and fixed to the lower end surface of the second electrode 302 .

[0065] At this time, it can be ensured that the joint assembly 200 and the electrode assembly 300 are stably connected without interfering with each other.

[0066] The high pressure resistant shell 100 has two opposite outer walls provided with a first mounting hole 101b and a second mounting hole 102b, which are two corresponding sets of external connection holes 401, and the axes of the first mounting hole 101b and the second mounting hole 102b are parallel and staggered. The first mounting hole 101b is connected to the first connection hole 101a, and the second mounting hole 102b is connected to the second connection hole 102a.

[0067] A stabilizing groove 102c is further provided in the high pressure resistant housing 100 at a position corresponding to the second mounting hole 102b.

[0068] The staff can check the two electrode and connector connection points through the first mounting hole 101b and the second mounting hole 102b respectively, so as to quickly find the connection problems.

[0069] A protective shell 105 is further fixed on the high-voltage resistant housing 100 at positions corresponding to the first electrode hole 103 and the second electrode hole 104 .

[0070] An embedded groove 105 a is formed at the end of the protective shell 105 , and a sealing cover 105 b is fixed in the embedded groove 105 a .

[0071] The protective shell 105 can ensure the sealing of the electrode end and prevent impurities such as dust and water vapor from entering the interior of the high-voltage resistant housing 100.

[0072] The first joint 201 includes a first pair of joints 201a and a first sealing tube 201b fixedly sleeved at the end thereof, and the second joint 202 includes a second pair of joints 202a and a second sealing tube 202b fixedly sleeved at the end thereof.

[0073] The first pair of connectors 201a and the second pair of connectors 202a are the columnar ends of the conductor 500 in the above embodiment.

[0074] The connection between the first pair of joints 201a and the first sealing tube 201b is also covered with a sealing ring, and the sealing ring here will also tightly abut against the connection between the first connecting hole 101a and the first joint hole 101, forming a better sealing environment.

[0075] The first pair of connectors 201a and the second pair of connectors 202a are respectively plugged into the first connection hole 101a and the second connection hole 102a.

[0076] The ends of the first pair of connectors 201a and the second pair of connectors 202a are fixedly connected with the first fixing member 201a-1 and the second fixing member 202a-1 respectively, and the connector assembly 200 and the electrode assembly 300 are quickly connected through the fixing effect of the first fixing member 201a-1 and the second fixing member 202a-1.

[0077] The first fixing member 201a-1 and the second fixing member 202a-1 are fasteners for connecting the columnar end and the plate-shaped end in the above embodiment, and the structures of the first fixing member 201a-1 and the second fixing member 202a-1 are different.

[0078] The first fixing member 201a-1 includes a first nut 201a-1a and a first screw 201a-1b fixedly connected to the bottom thereof, the first screw 201a-1b is fixedly sleeved with a first pressing plate 201a-1c on its outer wall, the first screw 201a-1b is threadedly inserted into the first pair of joints 201a and the first electrode 301, and the first pressing plate 201a-1c abuts against the top of the first pair of joints 201a.

[0079] The second fixing member 202a-1 includes a second nut 202a-1a and a second screw 202a-1b fixedly connected to its bottom, the outer wall of the second screw 202a-1b is fixedly sleeved with a second pressing plate 202a-1c, and the outer wall of the second screw 202a-1b is also threadedly sleeved with a pressing platform 202a-1d and a fixed pad 202a-1e.

[0080] The second pressing sheet 202a-1c is in contact with the bottom end of the second pair of joints 202a, the pressing platform 202a-1d is located between the second pair of joints 202a and the second electrode 302, and the fixing pad 202a-1e is cooperatively placed in the stabilizing groove 102c.

[0081] During use, the first fixing member 201a-1 is placed into the first mounting hole 101b, and the first nut 201a-1a is rotated so that the first screw 201a-1b is initially threadedly tightened with the first joint 201a. As the first nut 201a-1a rotates, the first screw 201a-1b is gradually threadedly fixed with the first electrode 301 until the first nut 201a-1a is completely immersed in the first mounting hole 101b.

[0082] Different from the installation and fixing method of the first fixing member 201a-1, when installing the second fixing member 202a-1, it is necessary to first pull the second connector 202a out of the second connecting hole 102a, and then put the second fixing member 202a-1 into the second mounting hole 102b. At this time, the second screw 202a-1b is gradually tightened with the second electrode 302 and the fixing pad 202a-1e in turn.

[0083] Furthermore, at this time, the second pair of joints 202a is inserted into the second connecting hole 102a. It should be noted that a groove is provided in the middle of the end of the second pair of joints 202a to facilitate the placement of the second screw 202a-1b. Then continue to rotate the second screw 202a-1b so that the pressing platform 202a-1d and the second pressing plate 202a-1c cooperate to clamp the second pair of joints 202a.

[0084] The sealing cover 105b is provided with a limiting groove 105b-1, in which a sealing gasket 105b-2 is placed. A straight groove 105b-2a is provided in the middle of the sealing gasket 105b-2, and a card interface 105b-3 is provided in the middle of the sealing cover 105b.

[0085] The first electrode 301 includes a mounting section 301a, an adjustment section 301b and a docking section 301c. The mounting section 301a and the docking section 301c are parallel and offset. The adjustment section 301b connects the mounting section 301a and the docking section 301c. The mounting section 301a is sleeved outside the first screw 201a-1b.

[0086] The angle between the adjustment section 301 b and the installation section 301 a is greater than 90°, and the structure of the second electrode 302 is the same as that of the first electrode 301 .

[0087] Waterproof plugs 106 are sealed and installed at the openings of the first mounting hole 101b and the second mounting hole 102b.

[0088] During use, the installation section 301a passes through the card interface 105b-3 and the straight slot 105b-2a from the outside to the inside in sequence, and is finally fixed to the first pair of connectors 201a and the second pair of connectors 202a.

[0089] Among them, the installation section 301a, the adjustment section 301b and the docking section 301c form a zigzag structure, which can avoid the interference problem of the joint connecting the sample. At the same time, the two electrodes are arranged in a unified horizontal plane, which can better fit the joint of the test piece, and the width spacing of the two electrodes is adjustable. At the same time, the height can be fine-tuned to ensure a tight connection with the joint section of the test piece.

[0090] The waterproof plug 106 can ensure that after the joint assembly 200 and the electrode assembly 300 are installed, the high-voltage housing 100 is isolated from the external environment, thereby ensuring stable connection within the high-voltage housing 100.

[0091] The remaining structures are the same as those of Example 1.

[0092] Example 3

[0093] Reference Figures 1 to 11 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that it provides a high-voltage and high-current resistant external switching measurement device, which includes the above-mentioned switching structure and also includes a data acquisition instrument 600, and the side wall of the data acquisition instrument 600 is connected to a plurality of groups of measurement ports 601.

[0094] The connecting line 700 includes a measuring line 701 and a clip 702 . One end of the measuring line 701 is connected to the measuring port 601 , and the other end is fixed to the clip 702 . The clip 702 is connected and fixed to the conductor 500 exposed in the external connection hole 401 .

[0095] When the clip 702 is connected to the conductor 500 , the clamping end portion thereof can fit into the external connection hole 401 .

[0096] It should be noted that during the measurement process, the data acquisition instrument 600 is connected and fixed to the conductors 500 in the two external holes 401 through the two connecting wires 700 .

[0097] Compared with Example 2, further, the tops of the first nut 201a-1a and the second nut 202a-1a are both provided with clamping grooves for insertion and fixing, and the clamping end of the clip 702 can be inserted into the clamping groove and clamp the first nut 201a-1a or the second nut 202a-1a, thereby connecting with the conductor 500.

[0098] The remaining structure is the same as that of Example 2.

[0099] During use, through this adapter, the device under test, generally a power battery pack, and this data acquisition instrument can be connected through the original high-voltage cable without the need for breaking the wire and other processes, ensuring that the device under test is connected reliably and can withstand instantaneous shocks of 1000V and 1000A, which can fully meet the technical requirements of the current power battery pack on the market with a maximum voltage of 800V and a current of 600A.

[0100] When in use, the electrode assembly 300 is connected to the device under test, a power battery pack or a drive motor, etc. The waterproof plug 106 designed in the high-pressure resistant shell 100 of the adapter body facilitates internal connection and maintenance of the cable and external connection to a high-current data acquisition instrument.

[0101] The connector assembly 200 is used to connect the original high-voltage wire harness, and is used to connect the high-voltage wire harness of the power battery pack, the high-voltage power supply, and the drive motor. This solution can be used to achieve reliable connection of the high-voltage wire harness when the DUT is in a humid or even wet environment, to prevent accidents such as flashover, flame retardancy, and high-voltage breakdown, while ensuring that the connection is tight and not loose.

[0102] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A switching structure, characterized in that: include, A shell (400), wherein a plurality of electrical connection paths (O) are provided in the shell (400), and the electrical connection paths penetrate the shell (400); The housing (400) is provided with external connection holes (401) at positions corresponding to the electrical connection paths (O); At least a portion of the conductor (500) on the electrical connection path (O) is exposed within the projection range of the external connection hole (401).

2. The switching structure according to claim 1, characterized in that: The electrical connection path (O) comprises a wire path (O1) and an electrode path (O2), and the electrode path (O2) is vertically connected to the wire path (O1).

3. The switching structure according to claim 2, characterized in that: The axes of the opening ends of the plurality of wire paths (O1) located on a side wall of the housing (400) are aligned, and the plane formed by the axes is the wire plane (A); The axes of the opening ends of the plurality of electrode paths (O2) located on the other side wall of the housing (400) are aligned, and the plane formed by the axes is the electrode plane (B); The conductor plane (A) and the electrode plane (B) are perpendicular to each other.

4. The switching structure according to claim 3, characterized in that: The connection point between the electrode path (O2) and the conductor path (O1) is an external connection point (D), and the external connection hole (401) is connected to the external connection point (D).

5. The switching structure according to any one of claims 2 to 4, characterized in that: The axis (Z) of the external connection hole (401) is located in the conductor plane (A), and the axis (Z) is parallel to the axis line (X) of the opening end of the conductor path (O1) located on the side wall of one side of the housing (400).

6. The switching structure according to claim 5, characterized in that: One end of the conductor (500) extends out of the housing (400) from the opening of the wire path (O1), and the other end extends out of the housing (400) from the opening of the electrode path (O2).

7. The switching structure according to claim 4, characterized in that: One end of the conductor (500) is columnar and the other end is plate-shaped, and the columnar end and the plate-shaped end are fixed perpendicularly to each other; There is a length difference between the columnar ends of two adjacent groups of conductors (500), and the plate-shaped ends of the conductors (500) connected thereto correspondingly have the same length.

8. The switching structure according to claim 7, characterized in that: The columnar end and the plate-shaped end are detachably connected via a fastener, the fastener is located on the external connection point (D), and the fastener can be matched and placed in the external connection hole (401).

9. A high voltage and high current external transfer measuring device, characterized in that: The switching structure comprises the switching structure as claimed in any one of claims 1 to 8, and further comprises: A data acquisition instrument (600), wherein a side wall of the data acquisition instrument (600) is connected to a plurality of groups of measurement ports (601); A connecting line (700), comprising a measuring line (701) and a clamp (702), wherein one end of the measuring line (701) is connected to the measuring port (601), and the other end is fixed to the clamp (702); The clip (702) is connected and fixed to the conductor (500) exposed in the external connection hole (401).

10. The high voltage and high current external transfer measuring device according to claim 9, characterized in that: When the clip (702) is connected to the conductor (500), the clamping end portion thereof can cooperate and extend into the external connection hole (401).

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