Device for connecting battery pack test interfaces

Abstract

Device for connecting battery pack test interfaces, characterized in that it comprises: a test cable connector comprising a first fitting structure (1), the first fitting structure (1) comprising a center post (11) and a plurality of terminal blocks (12) arranged on the side wall of the center post (11), the plurality of terminal blocks (12) being located at one end of the center post (11), and the terminal block (12) being provided with a first magnetic portion; a battery pack interface to be tested, comprising a second fitting structure (2), wherein the second fitting structure (2) comprises a plug-in slot (21) and a plurality of clamping slots (22) communicating with the plug-in slot (21), and wherein the extension direction of the clamping slot (22) is oriented perpendicular to the length direction of the plug-in slot (21), and wherein a second magnetic portion is arranged in the clamping slot (22), and wherein the clamping slots (22) and the terminal blocks (12) correspond one-to-one; and wherein, in a state where the test cable terminal is connected to the battery pack interface to be tested, the center post (11) is inserted into the plug-in slot (21), and the terminal block (12) is located in a corresponding clamping slot (22), and the first magnetic portion and the second magnetic portion are adsorbed to each other, and the first fitting structure (1) and the second fitting structure (2) are electrically connected to each other.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing batteries, in particular to a device for connecting battery pack test interfaces. STATE OF THE ART

[0002] A battery module, or battery pack, comprises a plurality of battery cells and is the basic energy storage unit of an electrochemical energy storage power plant. Its performance is related to the overall operational capability of the energy storage power plant. Therefore, before installing a battery module in an energy storage power plant, it is important to conduct random testing of the battery module to determine its performance. To test the battery pack, the test cable terminals of the charge / discharge tester must be connected to the electrode interfaces of the battery pack. Currently, two main fastening methods are used: screw fastening and clamp fastening.

[0003] To ensure that the test cable terminals are tightly connected to the battery pack interface during the battery testing process, two mechanical connection methods are currently mainly used: threaded connection and clamping by a clamping device.

[0004] Threaded connection involves fastening terminals, washers, nuts, etc., to the electrode interfaces of the battery pack by turning the fastening screws. They also need to be completely disassembled after testing. This is a widely used terminal-interface connection method. However, it has the problems of complicated installation and disassembly, the use of many parts, and the degree of fastening of manual tightening varies.

[0005] When connecting via a clamp, the clamp, which includes conductive material and wiring inside, is clamped at the electrode interface, which is very convenient for installation and disassembly. However, clamping via a clamp also has significant problems. Because the force comes from the clamp's own elastic mechanical structure, the contact force with the electrode is lower than with other connection methods, and the connection tightness is not quite sufficient. In addition, the elastic structure that provides the force is easily damaged and deteriorates, shortening its service life.

[0006] Therefore, there is an urgent need for a battery pack test interface connection device that can firmly connect the test cable connector and the battery interface, has a simple and reliable structure, and is easy to install and disassemble. CONTENT OF THIS APPLICATION

[0007] A purpose of the embodiments of the present application is to provide a battery pack test interface connecting device that can firmly connect the test cable terminal and the battery interface, has a simple and reliable structure, and is easy to install and disassemble.

[0008] To achieve the above-mentioned purpose, the present application is realized in this way: Embodiments of the present application provide an apparatus for connecting battery pack test interfaces, comprising: a test cable connector comprising a first mating structure, the first mating structure comprising a center post and a plurality of terminal blocks disposed on the side wall of the center post, the plurality of terminal blocks being located at one end of the center post, and wherein the terminal block is provided with a first magnetic portion; a battery pack interface to be tested comprising a second fitting structure, wherein the second fitting structure comprises a plug-in slot and a plurality of clamping slots communicating with the plug-in slot, and wherein the extension direction of the clamping slot is oriented perpendicular to the length direction of the plug-in slot, and wherein a second magnetic portion is arranged in the clamping slot, and wherein the clamping slots and the terminal blocks correspond one-to-one; and wherein, in a state where the test cable terminal is connected to the battery pack interface to be tested, the center post is inserted into the plug-in slot, and the terminal block is located in a corresponding clamping slot, and the first magnetic portion and the second magnetic portion are adsorbed to each other, and the first fitting structure and the second fitting structure are electrically connected to each other.

[0009] Optionally, a plurality of guide slots are provided on the inner wall of the plug-in slot, wherein the guide slots extend along the length direction of the plug-in slot, and wherein the guide slots and the clamping slots correspond one-to-one, and wherein the guide slot is connected to the corresponding clamping slot; and wherein a position of a plurality of clamping blocks on the center post and the position of a plurality of guide slots in the plug slot correspond to each other.

[0010] Optionally, the second magnetic portion is arranged in the clamping slot at a location outside a projection range of the guide slot along the length direction of the insertion slot.

[0011] Optionally, the plurality of clamping slots are interconnected to form an annular slot structure.

[0012] Optionally, the first magnetic section is a ferrous bump and the second magnetic section is a permanent magnet.

[0013] Optionally, the material of the center post is copper, with a copper connecting element arranged on the bottom wall of the slot for electrical connection to the center post; and wherein, in a state that the test cable terminal is connected to the battery pack interface to be tested, the copper connecting member is in contact with the end face of the center post.

[0014] Optionally, the diameter of the copper connecting element is less than or equal to the diameter of the center post.

[0015] Optionally, the inner wall of a side of the clamping slot facing the opening of the plug-in slot is a magnetic inner wall which is flush with the bottom wall of the plug-in slot, wherein the second magnetic section is arranged in the magnetic inner wall.

[0016] Optionally, a plurality of terminal blocks are evenly distributed on the side wall of the center post; wherein the magnetic inner wall is divided into a plurality of magnetic regions and a plurality of non-magnetic regions along the circumference of the plug-in slot, and wherein the magnetic regions and the non-magnetic regions each have the shape of a fan ring; and wherein a fan-ring-shaped region in the magnetic inner wall, which overlaps with the projection region of the guide slot along the length direction of the plug-in slot, is arranged as a non-magnetic region, and wherein a fan-ring-shaped region in the magnetic inner wall, which does not overlap with the projection region of the guide slot along the length direction of the plug-in slot, is arranged as a magnetic region, and wherein the second magnetic portions are distributed in the magnetic regions.

[0017] Optionally, the height of the terminal block is smaller than the height of the clamping slot. Advantages:

[0018] In the embodiments of the present application, during the test, the test cable terminal and the battery pack interface to be tested are connected to each other, namely, an end of the first fitting structure provided with a clamping block is inserted into a socket slot, and by rotating the first fitting structure, the clamping block is driven to enter the clamping slot. When the first magnetic portion of the terminal block and the second magnetic portion of the clamping slot are close to each other up to a certain distance, the first magnetic portion and the second magnetic portion adsorb together in a natural manner, now the test cable terminal and the battery pack interface to be tested are relatively fixed by the constraint of the terminal block, the clamping slot, the first magnetic portion, and the second magnetic portion.

[0019] In the testing process of the fixture, only the first fitting structure needs to be inserted into the plug-in slot and rotated to complete the connection and fixing of the test cable terminal and the battery pack interface under test, and the disassembly and installation process is simple and convenient; through the cooperation of the terminal block, the clamp slot, the first magnetic section, and the second magnetic section, the test cable terminal and the battery pack interface under test are fixed, so that the connection between the test cable terminal and the battery pack interface under test is relatively firm and highly reliable, and the overall structure is relatively simple;Furthermore, the fitting structure consisting of the terminal block, the clamping slot, the first magnetic portion, and the second magnetic portion has a longer service life compared to the elastic mechanism of the clamping device, which can ensure the tightness of the connection between the test cable terminal and the battery pack interface under test during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will be apparent and readily understood from the description of the embodiments in conjunction with the following drawings. Fig. 1 shows a schematic diagram of the structure of a battery pack test interface connection apparatus provided by an embodiment of the present application; Fig. 2 shows a schematic diagram of the structure of a first fitting structure provided by an embodiment of the present application; Fig. 3 shows a schematic plan view of a first fitting structure provided by an embodiment of the present application; Fig. 4 shows a schematic diagram of the structure of a second fitting structure provided by an embodiment of the present application; Fig. 5 shows a schematic diagram of the internal structure of a second fitting structure provided by an embodiment of the present application; Fig. 6 shows a schematic diagram of the regional distribution of a magnetic inner wall provided by an embodiment of the present application. List of reference symbols 1 First fitting structure 11 center posts 12 terminal block 2 Second fitting structure 21 slot 22 clamping slot 23 Guide slot 24 copper connecting element 25 Magnetic interior wall 251 Magnetic field 252 Non-magnetic area DETAILED DESCRIPTION

[0021] In conjunction with the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be explained clearly and completely below. Obviously, the explained embodiments do not represent all embodiments, but only a part of the embodiments of the present application. All other embodiments obtained by one of ordinary skill in the art based on the embodiments in the present application, provided that no creative work is performed, should be considered to be covered by the scope of the present application.

[0022] The terms "first," "second," etc., in the description and claims of the present application are used to distinguish similar objects from one another, and they should not necessarily be used to explain a particular sequence or priority. It should be understood that the data so used may be interchanged under appropriate circumstances so that the embodiments of the present application may be implemented in an order other than that illustrated or described herein, and that the objects identified by the terms "first," "second," etc., are generally of one type, and the number of objects, e.g., the first object, the second object, etc., may be one or more than one.Furthermore, in the description and claims, “and / or” indicates at least one of the connected objects, and the symbol “ / ” generally indicates that the connected objects are in an “or” relationship.

[0023] In the following, a device for connecting battery pack test interfaces provided by the embodiment of the present application will be explained in more detail in conjunction with the attached drawings using specific embodiments and application scenarios.

[0024] Fig. 1 shows a schematic diagram of the structure of a battery pack test interface connection apparatus provided by an embodiment of the present application.

[0025] See Fig. 1, a device for connecting battery pack test interfaces, comprising a test cable connector and a battery pack interface to be tested.

[0026] As in Fig. As shown in Figures 2 to 3, the test cable terminal comprises a first fitting structure 1 including a center post 11 and a plurality of terminal blocks 12 arranged on the side wall of the center post 11, wherein the plurality of terminal blocks 12 are located at one end of the center post 11, and wherein the terminal block 12 is provided with a first magnetic portion; and wherein a charge and discharge test cable of the battery testing device is connected to one end of the center post 11 without the terminal block.

[0027] As in Fig. 4 to 6, the battery pack interface to be tested comprises a second fitting structure 2 comprising a plug-in slot 21 and a plurality of clamping slots 22 communicating with the plug-in slot 21, and wherein the extension direction of the clamping slot 22 is oriented perpendicular to the length direction of the plug-in slot 21, and wherein a second magnetic portion is arranged in the clamping slot 22, and wherein the clamping slots 22 and the terminal blocks 12 correspond one-to-one.

[0028] In a state where the test cable terminal is connected to the battery pack interface to be tested, the center post 11 is inserted into the plug slot 21, the terminal block 12 is located in a corresponding clamp slot 22, and the first magnetic portion and the second magnetic portion are adsorbed to each other, and the first fitting structure 1 and the second fitting structure 2 are electrically connected to each other.

[0029] In the exemplary embodiment of the present application, the test cable connector comprises a first mating structure 1, wherein the battery pack interface to be tested comprises a second mating structure 2 having a plug-in slot 21, and wherein the first mating structure 1 can be plugged into the plug-in slot 21 of the second mating structure 2 to establish the connection between the test cable connector and the battery pack interface to be tested; and wherein the first mating structure 1 comprises a center post 11 and a plurality of terminal blocks 12, and wherein the plurality of terminal blocks 12 are arranged on the side wall of the center post 11 and are located at an end portion of the center post 11, and wherein the plurality of terminal blocks 12 form a projection that projects outwardly on the side wall of the center post 11, and wherein a plurality of clamping slots 22 are provided in the plug-in slot 21 of the second mating structure 2.and wherein the extension direction of the clamping slots 22 is oriented perpendicular to the length direction of the plug-in slot 21. When the center post 11 is inserted into the plug-in slot 21, the terminal block 12 can enter the clamping slot 22 by rotating the first fitting structure 1. The clamping slot 22 can now cooperate with the terminal block 12 to realize an axial mechanical fastening, thereby preventing the first fitting structure 1 from exiting the plug-in slot 21 to improve the reliability of the connection between the test cable connector and the battery pack interface to be tested; and wherein a first magnetic section is arranged on each terminal block 12, and a second magnetic section is arranged in each clamping slot 22.and wherein the first magnetic portion and the second magnetic portion can generate a mutually attractive magnetic force; when the terminal block 12 enters the clamping slot 22, the first magnetic portion and the second magnetic portion are adsorbed to each other, thereby achieving axial and circumferential magnetic fixation to prevent the first fitting structure 1 from exiting the plug-in slot 21. In this way, the reliability of the connection between the test cable terminal and the battery pack interface to be tested is improved. At the same time, the first fitting structure 1 is prevented from rotating to prevent the terminal block 12 from exiting the clamping slot 22 by rotating the center post 11.whereby the reliability of the connection between the test cable terminal and the battery pack interface to be tested is further improved; and wherein the corresponding surfaces of the first fitting structure 1 and the second fitting structure 2 are provided with electrical connection mechanisms, and wherein the electrical connection mechanism on the first fitting structure 1 is connected to the charge and discharge test cable of the battery testing device, and wherein the electrical connection mechanism on the second fitting structure 2 is connected to the corresponding electrode of the battery to be tested; when the first fitting structure 1 is inserted into the plug-in slot 21 of the second fitting structure 2, the electrical connection mechanisms of the first fitting structure 1 and the second fitting structure 2 come into contact with each other,to realize an electrical connection between the first fitting structure 1 and the second fitting structure 2.,

[0030] Specifically, during the test, the test cable terminal and the battery pack interface to be tested are connected to each other, namely, one end of the first fitting structure 1 provided with the terminal block 12 is inserted into the plug slot 21, and by rotating the first fitting structure 1, the terminal block 12 is driven to enter the clamping slot 22. When the first magnetic portion of the terminal block 12 and the second magnetic portion of the clamping slot 22 are close to each other to a certain distance, the first magnetic portion and the second magnetic portion naturally adsorb together, now the test cable terminal and the battery pack interface to be tested are relatively fixed by the constraint of the terminal block 12, the clamping slot 22, the first magnetic portion, and the second magnetic portion.

[0031] In the testing process of the device, only the first fitting structure 1 needs to be inserted into the plug-in slot 21 and rotated to complete the connection and fixing of the test cable terminal and the battery pack interface to be tested, and the disassembly and installation process is simple and convenient; by the cooperation of the terminal block 12, the clamping slot 22, the first magnetic section, and the second magnetic section, the test cable terminal and the battery pack interface to be tested are fixed, so that the connection between the test cable terminal and the battery pack interface to be tested is relatively firm and highly reliable, and the overall structure is relatively simple;Furthermore, the fitting structure consisting of the terminal block 12, the clamping slot 22, the first magnetic portion, and the second magnetic portion has a longer service life compared to the elastic mechanism of the clamping device, which can ensure the tightness of the connection between the test cable terminal and the battery pack interface to be tested during long-term use.

[0032] The terminal blocks 12 may be provided in a number of 2. Preferably, the terminal blocks 12 are provided in a number of 3 or more, and the 3 or more terminal blocks 12 are evenly distributed on the side surface of the center post 11. Due to the cooperation between all the terminal blocks 12 and clamping slots 22 and the adsorption of the first magnetic portion on the terminal block 12 and the second magnetic portion in the clamping slot 22, the first fitting structure 1 is made relatively stable in the plug slot 21 and is not easily shaken or displaced under the action of the external force, thereby reducing the possibility of the first fitting structure 1 shaking during the test process, which makes the electrical connection between the first fitting structure 1 and the second fitting mechanism unstable and impairs the stability of the test.

[0033] The arrangement of the first magnetic portion on the terminal block 12 may be such that a part of the terminal block 12 that is in contact with the second magnetic portion is the first magnetic portion, or such that the entire terminal block 12 is used as the first magnetic portion.

[0034] The connection between the clamping block 12 and the center post 11 can be that the clamping block 12 is placed on a side surface of the center post 11, or that the clamping block 12 is formed in one piece with the center post 11.

[0035] In this case, the design such that the extension direction of the clamping slot 22 is oriented perpendicular to the length direction of the plug-in slot 21 may involve the clamping slot 22 extending along a straight line perpendicular to the length direction of the plug-in slot 21 and the clamping slot 22 being rectilinear; or the clamping slot 22 extending around the circumference of the plug-in slot 21 and the clamping slot 22 being arcuate.

[0036] The terminal block 12 may be a rectangular structure, and the cross section of the clamping slot 22 may be a rectangle adapted to the terminal block 12.

[0037] Optionally, in some embodiments, as in Fig. 4 to 5, a plurality of guide slots 23 are provided on the inner wall of the plug-in slot 21, wherein the guide slots 23 extend along the length direction of the plug-in slot 21, and wherein the guide slots 23 and the clamping slots 22 correspond one-to-one, and wherein the guide slot 23 is connected to the corresponding clamping slot 22; and wherein the position of a plurality of clamping blocks 12 on the center post 11 and the position of a plurality of guide slots 23 in the plug-in slot 21 correspond to each other.

[0038] In the embodiment of the present application, the guide slot 23 extends along the length direction of the plug-in slot 21, one end of the guide slot 23 is exposed from the opening of the plug-in slot 21, and the other end of the guide slot 23 is connected to the clamping slot 22, now the connection structure between the clamping slot 22 and the guide slot 23 is formed in an "L" shape;the position of a plurality of terminal blocks 12 on the center post 11 and the position of a plurality of guide slots 23 in the plug-in slot 21 correspond to each other; when the first fitting structure 1 is inserted into the plug-in slot 21, the plurality of terminal blocks 12 can be aligned with the position of an end of the plurality of guide slots 23 exposed from the opening of the plug-in slot 21; then the first fitting structure 1 is inserted into the plug-in slot 21; now the plurality of terminal blocks 12 can move to one end of the clamping slot 22 under the guidance of the guide slots 23; then, by rotating the first fitting structure 1, the terminal block 12 is caused to enter the clamping slot 22;

[0039] With the arrangement of the guide slots 23, the terminal block 12 can directly enter from the plug slot 21 into the position where the clamping slot 22 is located, and by rotating, the terminal block 12 is caused to enter the clamping slot 22, and the whole operation is simple and quick.

[0040] It is possible that a first part of the second magnetic section is arranged in the clamping slot 22 within a projection area of ​​the guide slot 23 along the length direction of the plug-in slot 21 (the projection area of ​​the guide slot 23 along the length direction of the plug-in slot 21 is explained using an example, e.g., when the length direction of the plug-in slot 21 is a vertical direction, an area in the clamping slot 22 located directly below the guide slot 23 is the projection area of ​​the guide slot 23 along the length direction of the plug-in slot 21), and a second part is arranged in the clamping slot 22 outside a projection area of ​​the guide slot 23 along the length direction of the plug-in slot 21, so that when the terminal block 12 is passed straight from the guide slot 23 to one end of the clamping slot 22,The first magnetic portion on the terminal block 12 is adsorbed with the first part of the second magnetic portion. Then, by rotating the first fitting structure 1, the terminal block 12 must be moved out of the projection area of ​​the guide slot 23 along the length direction of the plug-in slot 21 and adsorbed with the second part of the second magnetic portion. Now, the terminal block 12, the clamping slot 22, the first magnetic portion, and the second magnetic portion cooperate to secure the test cable connector and the battery pack interface to be tested.

[0041] It is also possible that the second magnetic portion is not arranged in the clamping slot 22 within a projection range of the guide slot 23 along the length direction of the plug-in slot 21, and the second magnetic portion is arranged only in the clamping slot 22 at a location outside a projection range of the guide slot 23 along the length direction of the plug-in slot 21.

[0042] Optionally, in some embodiments, the second magnetic portion is arranged in the clamping slot 22 at a location outside a projection area of ​​the guide slot 23 along the length direction of the plug-in slot 21.

[0043] In the embodiment of the present application, when the terminal block 12 is passed straight from the guide slot 23 to one end of the clamping slot 22, the first magnetic portion on the terminal block 12 is not too hindered by the magnetic attraction force, so that it can be caused with a smaller force to rotate the first fitting structure 1 and penetrate the terminal block 12 deeply into the clamping slot 22 to complete the snap connection between the terminal block 12 and the clamping slot 22, thereby reducing the situation that the magnetic attraction force hinders the snap connection between the first fitting structure 1 and the second fitting structure 2, which makes the disassembly and assembly process of the test smoother.

[0044] It is possible that one end of the clamping slot 22 is connected to an adjacent guide slot 23 and the other end is closed; it is also possible that two ends of the clamping slot 22 are each connected to two adjacent clamping slots 22.

[0045] Optionally, in some embodiments, as in Fig. 5, a plurality of clamping slots 22 are connected together to form an annular slot structure.

[0046] In the embodiment of the present application, the annular slot formed by connecting the plurality of clamping slots 22 surrounds the plug-in slot 21. When the first fitting structure 1 is inserted into the plug-in slot 21, by rotating the first fitting structure 1, a plurality of terminal blocks 12 can be allowed to move arbitrarily in the annular slot. Now, the terminal block 12 and the first magnetic portion on the terminal block 12 can cooperate with any one of the clamping slots 22 and the second magnetic portion therein to realize the fastening between the test cable terminal and the battery pack interface to be tested, which makes the disassembly and assembly process of the test easier and faster.

[0047] It is possible for the first magnetic section to be a permanent magnet and the second magnetic section to be a ferrous component arranged in the clamping slot 22; it is also possible for the first magnetic section to be a ferrous bump and the second magnetic section to be a permanent magnet.

[0048] Optionally, in some embodiments, the first magnetic portion is a ferrous bump and the second magnetic portion is a permanent magnet.

[0049] In the embodiment of the present application, since the first magnetic portion is a ferrous bump, adsorption of the first magnetic portion to other metals can be avoided when moving the test cable terminal, causing inconvenience during use. The ferrous bump is also cheaper, making it possible to replace it at a lower cost when damage occurs to the terminal block 12 or the first magnetic portion. Furthermore, since the second magnetic portion is a permanent magnet, the permanent magnet can be stored deep in the plug-in slot 21, thereby reducing damage to the permanent magnet or weakening its magnetic properties. Thus, the service life of the entire device can be extended and costs reduced.

[0050] The entire terminal block 12 is considered as a first magnetic section.

[0051] Optionally, in some embodiments, the material of the center post 11 is copper, wherein a copper connecting element 24 is arranged on the bottom wall of the plug-in slot 21 for electrical connection to the center post 11, and wherein, in a state that the test cable terminal is connected to the battery pack interface to be tested, the copper connecting element 24 is in contact with the end surface of the center post 11.

[0052] In the embodiment of the present application, the copper center post 11 serves as an electrical connection mechanism on the first mating structure 1 and is connected to the charge and discharge test cable of the battery testing device; and the copper connection element 24 serves as an electrical connection mechanism on the second mating structure 2 and is connected to the corresponding electrode of the battery under test. The copper connection element 24 is arranged on the bottom wall of the plug-in slot 21, and a surface of the copper connection element 24 in contact with the center post 11 is flush with the bottom wall of the plug-in slot 21. During testing, the end surface of the center post 11 is brought into contact with the copper connection element 24 to realize electrical connection between the first mating structure 1 and the second mating structure 2.By disposing the copper connecting element 24 on the bottom surface of the plug-in slot 21, friction between the center post 11 and the copper connecting element 24 can be avoided during insertion of the center post 11 into the plug-in slot 21, thus causing wear of the copper connecting element 24, thereby extending the service life of the copper portion, ensuring the stability of the electrical connection between the first fitting structure 1 and the second fitting mechanism, and thereby improving the stability of the test.

[0053] The center post 11 may be cylindrical to facilitate the rotation of the first fitting structure 1 in the slot 21.

[0054] The diameter of the inner wall of the slot 21 may be equal to the diameter of the center post 11. By making the diameter of the inner wall of the slot 21 equal to the diameter of the center post 11, the inner wall of the slot 21 may confine the center post 11, thereby preventing the first mating structure 1 from wobbling during the test process, which would result in an unstable electrical connection between the first mating structure 1 and the second mating mechanism and impair the stability of the test.

[0055] Optionally, in some embodiments, the diameter of the copper connecting element 24 is less than or equal to the diameter of the center post 11.

[0056] In the embodiment of the present application, by making the diameter of the copper connecting member 24 smaller than or equal to the diameter of the center post 11, it is possible for the end surface of the center post 11 to completely cover the copper connecting member 24 to ensure the reliability of the contact between the center post 1 and the copper connecting member 24.

[0057] Optionally, in some embodiments, as in Fig. 5, the inner wall of a side of the clamping slot 22 facing the opening of the plug-in slot 21 has a magnetic inner wall 25 which is flush with the bottom wall of the plug-in slot 21, the second magnetic section being arranged in the magnetic inner wall 25.

[0058] Since, in the embodiment of the present application, the magnetic inner wall 25 is the inner wall of a side of the clamping slot 22 facing the opening of the plug-in slot 21, the direction of the magnetic attraction force generated by the second magnetic portion in the magnetic inner wall 25 on the first magnetic portion is a direction facing the depth of the plug-in slot 21;Since the magnetic inner wall 25 is flush with the bottom surface of the inner wall of the plug slot 21 when the first magnetic portion is adsorbed together with the second magnetic portion, the center post 11 can be firmly pressed against the copper connecting element 24 located on the bottom wall of the plug slot 21 under the action of the magnetic attraction force in the direction of the depth of the plug slot 21 to ensure the stability of the electrical connection between the first fitting structure 1 and the second fitting mechanism and thus improve the stability of the test.

[0059] Optionally, in some embodiments, it is possible for the height of the clamping block 12 to be smaller than the height of the clamping slot 22, which makes it easier for the clamping block 12 to enter the clamping slot 22 by turning.

[0060] Optionally, in some embodiments, a plurality of clamping blocks 12 are evenly distributed on the side wall of the center post 11; as in Fig. 6, the magnetic inner wall 25 is divided along the circumference of the plug-in slot 21 into a plurality of magnetic regions 251 and a plurality of non-magnetic regions 252, wherein the magnetic regions 251 and the non-magnetic regions 252 each have the shape of a fan ring.

[0061] Here, a fan-shaped region in the magnetic inner wall 25, which overlaps with the projection region of the guide slot 23 along the length direction of the plug-in slot 21, is arranged as a non-magnetic region 252, and a fan-shaped region in the magnetic inner wall 25, which does not overlap with the projection region of the guide slot 23 along the length direction of the plug-in slot 21, is arranged as a magnetic region 251, and the second magnetic portions are distributed in the magnetic regions 251.

[0062] In the embodiment of the present application, a plurality of terminal blocks 12 are evenly distributed on the side wall of the center post 11, namely, the plurality of terminal blocks 12 have an equal distance from each other, for example, when the terminal blocks 12 are provided in a number of 3, the connecting lines of the three terminal blocks 12 form an equilateral triangle;the magnetic inner wall 25 is divided along the circumference of the plug-in slot 21 into a plurality of magnetic regions 251 in which no second magnetic portion is arranged and a plurality of non-magnetic regions 252 in which the second magnetic portions are distributed. The magnetic regions 251 in which the second magnetic portions are distributed mean that the magnetic regions 251 are all capable of generating a magnetic attraction force to the first magnetic portion, for example, that the entire magnetic regions 251 are composed of permanent magnets;the magnetic regions 251 and the non-magnetic regions 252 each have the shape of a fan ring, the terminal blocks 12, the magnetic regions 251 and the non-magnetic regions 252 have an equal number, furthermore the plurality of magnetic regions 251 has an equal central angle, and the plurality of magnetic regions 251 are arranged evenly and spaced apart; By adjusting the magnetic regions 251 and the non-magnetic regions 252, it is possible to move the plurality of terminal blocks 12 simultaneously into different magnetic regions 251 separately and simultaneously, regardless of how the first fitting structure 1 is rotated, thereby ensuring that the first magnetic portions of the plurality of terminal blocks 12 are always subjected to a magnetic attraction force at the same time to ensure that the first fitting structure 1 and the second fitting mechanism are always subjected to a relatively stable magnetic connection, which ensures the stability of the electrical connection between the first fitting structure 1 and the second fitting mechanism and thus improves the stability of the test.

[0063] Finally, it should be noted that the above embodiments serve only to illustrate the technical solution of the present application and are not limiting. Although the present application is explained in more detail in connection with the above embodiments, those skilled in the art should understand that they may modify the technical solutions listed in the above embodiments or replace the technical features partially or entirely with equivalent ones. With these modifications or replacements, the corresponding technical solutions should still be considered to be covered by the spirit and scope of the technical solutions of the respective embodiments of the present application.

Claims

[1] Device for connecting battery pack test interfaces, characterized by that it includes: a test cable connector comprising a first fitting structure (1), the first fitting structure (1) comprising a center post (11) and a plurality of terminal blocks (12) arranged on the side wall of the center post (11), the plurality of terminal blocks (12) being located at one end of the center post (11), and the terminal block (12) being provided with a first magnetic portion; a battery pack interface to be tested, comprising a second fitting structure (2), wherein the second fitting structure (2) comprises a plug-in slot (21) and a plurality of clamping slots (22) communicating with the plug-in slot (21), and wherein the extension direction of the clamping slot (22) is oriented perpendicular to the length direction of the plug-in slot (21), and wherein a second magnetic portion is arranged in the clamping slot (22), and wherein the clamping slots (22) and the terminal blocks (12) correspond one-to-one; and wherein, in a state where the test cable terminal is connected to the battery pack interface to be tested, the center post (11) is inserted into the plug-in slot (21), and the terminal block (12) is located in a corresponding clamping slot (22), and the first magnetic portion and the second magnetic portion are adsorbed to each other, and the first fitting structure (1) and the second fitting structure (2) are electrically connected to each other. [2] Device for connecting battery pack test interfaces according to claim 1, characterized bythat a plurality of guide slots (23) are provided on the inner wall of the plug-in slot (21), wherein the guide slots (23) extend along the length direction of the plug-in slot (21), and wherein the guide slots (23) and the clamping slots (22) correspond one-to-one, and wherein the guide slot (23) is connected to the corresponding clamping slot (22); and wherein a position of a plurality of clamping blocks (12) on the center post (11) and the position of a plurality of guide slots (23) in the plug-in slot (21) correspond to one another. [3] Device for connecting battery pack test interfaces according to claim 2, characterized by that the second magnetic portion is arranged in the clamping slot (22) at a location outside a projection area of ​​the guide slot (23) along the length direction of the plug-in slot (21). [4] Device for connecting battery pack test interfaces according to one of the preceding claims, characterized by that the plurality of clamping slots (22) are interconnected to form an annular slot structure. [5] Device for connecting battery pack test interfaces according to one of the preceding claims, characterized by that the first magnetic section is a ferrous bump and the second magnetic section is a permanent magnet. [6] Device for connecting battery pack test interfaces according to one of claims 2 to 5, characterized bythat the material of the center post (11) is copper, wherein a copper connecting element (24) for electrical connection to the center post (11) is arranged on the bottom wall of the plug-in slot (21); and wherein, in a state that the test cable terminal is connected to the battery pack interface to be tested, the copper connecting element (24) is in contact with the end surface of the center post (11). [7] Device for connecting battery pack test interfaces according to claim 6, characterized by that the diameter of the copper connecting element (24) is less than or equal to the diameter of the center post (11). [8] Device for connecting battery pack test interfaces according to claim 6 or 7, characterized bythat the inner wall of a side of the clamping slot (22) facing the opening of the plug-in slot (21) is a magnetic inner wall (25) which is flush with the bottom wall of the plug-in slot (21), wherein the second magnetic section is arranged in the magnetic inner wall (25). [9] Device for connecting battery pack test interfaces according to claim 8, characterized by that a plurality of clamping blocks (12) are evenly distributed on the side wall of the center post (11); wherein the magnetic inner wall (25) is divided along the circumference of the plug-in slot (21) into a plurality of magnetic regions (251) and a plurality of non-magnetic regions (252), and wherein the magnetic regions (251) and the non-magnetic regions (252) each have the shape of a fan ring; and wherein a fan-shaped region in the magnetic inner wall (25) which overlaps with the projection region of the guide slot (23) along the length direction of the plug-in slot (21) is arranged as a non-magnetic region (252), and wherein a fan-shaped region in the magnetic inner wall (25) which does not overlap with the projection region of the guide slot (23) along the length direction of the plug-in slot (21) is arranged as a magnetic region (251), and wherein the second magnetic sections are distributed in the magnetic regions (251). [10] Device for connecting battery pack test interfaces according to one of the preceding claims, characterized by that the height of the clamping block (12) is smaller than the height of the clamping slot (22).

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