Sampling wire harness connecting device

Abstract

The utility model relates to the technical field of batteries, in particular to a sampling wire harness connecting device which comprises a sampling wire connecting module, a battery cell wire connecting module and a conversion part, the sampling wire connecting module is provided with a plurality of sampling units, and each sampling unit is used for being connected with a corresponding sampling wire; the battery cell wire connection module is provided with a plurality of wire terminals, and each wire terminal is used for being connected with a corresponding battery cell wire; and the plurality of conversion parts are arranged between the sampling line connecting module and the battery cell wire connecting module, the conversion parts are connected with the wire terminals in a one-to-one correspondence manner, and each conversion part rotates around the axis of the conversion part so as to enable the corresponding wire terminal to be electrically connected with any sampling unit. According to the device, the corresponding battery core wire can be electrically connected with any sampling wire, and the connection relationship between the sampling wire harnesses can be quickly changed, so that the sampling wire harnesses are adaptive to a multi-channel conversion sampling environment, the development efficiency is effectively improved, the development period is shortened, and the development cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a sampling wire harness connection device. Background Art

[0002] During the project development stage, since the battery sampling channels and quantities of each project are different, a set of AFE (Analog Front End, in the battery management system refers to the battery sampling chip) sampling wire harness can only meet one environment, and a set of wire harness can only be used in the corresponding project and is not applicable to other projects. When using the same BMS (Battery Management System) main board to collect different AFE battery cells, different wire harness sampling environments need to be built separately to meet the requirements, and it is also troublesome to organize the wire harness.

[0003] For example, for the BMS battery cell sampling of different vehicles of the same vehicle factory in Project A, Project B, and Project C, the same main board is used for their main boards, but the configurations and sampling quantities of the AFE sampling lines are different. For example: Project A needs to collect 14 channels of AFEⅠ, among which, the No. 3 battery cell, No. 4 battery cell, and No. 5 battery cell need to be connected together; Project B needs to collect 14 channels of AFEⅠ, among which, the No. 5 battery cell and No. 6 battery cell need to be connected together; Project C needs to collect all 14 channels of AFEⅠ, and there is no sampling wire to be connected together; similarly, other AFE sampling configurations are also different (generally, there are six to nine AFEs in the BMS). At this time, three sets of different sampling wire harnesses are required to meet the needs of project development. Therefore, there is an urgent need for a set of sampling wire harness that can meet different sampling requirements when using the same BMS main board to collect different AFE battery cells. Summary of the Utility Model

[0004] This application provides a sampling wire harness connection device to solve the problem in the prior art that different sampling wire harnesses need to be used separately to build an adapted sampling environment when using the same BMS main board to collect different AFE battery cells.

[0005] This application provides a sampling wire harness connection device, including:

[0006] A sampling wire connection module, having a plurality of sampling units, each sampling unit is respectively used to connect with the corresponding sampling wire;

[0007] A battery cell wire connection module, having a plurality of wire terminals, each wire terminal is respectively used to connect with the corresponding battery cell wire;

[0008] There are a plurality of conversion parts, which are arranged between the sampling wire connection module and the battery cell wire connection module. The conversion parts are connected to the wire terminals one by one, and each conversion part makes the corresponding wire terminal electrically connected to any sampling unit by rotating around its own axis.

[0009] In a possible design, the sampling line connection module includes a central axis, the sampling units are annularly arrayed around the axis of the central axis on the side wall of the central axis, and the conversion parts are arranged along the axial direction of the central axis and sleeved on the outer surface of the sampling units.

[0010] In a possible design, each sampling unit respectively includes:

[0011] A conductor, the length direction of the conductor is the same as the axial direction of the central axis;

[0012] Sampling terminals, there are multiple of them, which are arranged on the conductor at intervals along the length direction of the conductor, and the sampling terminals are respectively arranged opposite to the corresponding conversion parts.

[0013] In a possible design, mounting grooves are formed on the side wall of the central axis in an annular array, the length direction of the mounting grooves is the same as the axial direction of the central axis, and the sampling units are arranged in the mounting grooves.

[0014] In a possible design, the conversion part includes:

[0015] A dial ring, the dial ring has an annular structure, the inner ring of the dial ring is an insulating layer, and the outer ring of the dial ring is a conductive layer;

[0016] A conductive block, which is arranged on the dial ring, one end of the conductive block is connected to the conductive layer, and the other end of the conductive block is used to connect to any sampling unit.

[0017] In a possible design, limiting card slots are formed on the outer ring of the dial ring in an annular array.

[0018] In a possible design, it further includes a first housing and a second housing, a receiving cavity is jointly formed between the first housing and the second housing, and an operation window communicating with the receiving cavity is formed on the first housing.

[0019] In a possible design, first through holes are respectively formed at the end parts of the first housing and the second housing, and the first through holes are arranged in one-to-one correspondence with the sampling units;

[0020] And / or, fixing holes are respectively formed at the end parts of the first housing and the second housing;

[0021] And / or, a base is formed on the second housing, second through holes are formed on the base at intervals, wire terminals are respectively arranged in the second through holes; the battery cell wire connection module further includes a cover plate, the cover plate is installed on the base, third through holes are formed on the cover plate at intervals, the diameter of the third through holes is smaller than that of the second through holes, and the ends of the wire terminals are respectively abutted against one end of the third through holes.

[0022] In a possible design, a baffle is arranged on the inner wall of the receiving cavity, and the baffle is located between two adjacent conversion parts.

[0023] In a possible design, the wire terminal and the sampling terminal are respectively spring thimbles.

[0024] The beneficial effects of this application are as follows:

[0025] The sampling wire harness connection device of this application includes a sampling wire connection module, a battery cell wire connection module, and a conversion part. The sampling units are respectively connected to the corresponding sampling wires, and the wire terminals are respectively connected to the corresponding battery cell wires. By rotating the conversion part around its own axis, the corresponding battery cell wire can be electrically connected to any sampling wire, and the connection relationship between the sampling wire harnesses can be quickly changed, so that the sampling wire harness can adapt to the sampling environment with multi-channel transformation, effectively improving the development efficiency, shortening the development cycle, reducing the development cost, being beneficial to the maintenance of the sampling environment, being able to improve the utilization rate of the sampling environment and the efficiency of BMS maintenance, and having strong practicability. Description of the Drawings

[0026] In order to more clearly illustrate the specific implementation manners of this application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific implementation manners or the prior art. Obviously, the drawings in the following description are some implementation manners of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the sampling wire harness connection device provided by the embodiment of this application;

[0028] Figure 2 Assembly drawing of the sampling wire harness connection device provided by the embodiment of this application;

[0029] Figure 3 Internal structure diagram of the sampling wire harness connection device provided by the embodiment of this application;

[0030] Figure 4 Structural schematic diagram of the first housing of the sampling wire harness connection device provided by the embodiment of this application;

[0031] Figure 5 Structural schematic diagram of the second housing of the sampling wire harness connection device provided by the embodiment of this application;

[0032] Figure 6 Side view of the second housing of the sampling wire harness connection device provided by the embodiment of this application;

[0033] Figure 7 Structural schematic diagram of the cover plate of the sampling wire harness connection device provided by the embodiment of this application;

[0034] Figure 8Schematic diagram of the sampling unit of the sampling wire harness connection device provided by the embodiment of the present application;

[0035] Figure 9 Schematic diagram of the dial ring of the sampling wire harness connection device provided by the embodiment of the present application;

[0036] Figure 10 Schematic diagram of the conductive block of the sampling wire harness connection device provided by the embodiment of the present application;

[0037] Figure 11 Schematic diagram of the BMS sampling system.

[0038] Reference signs:

[0039] 100, sampling wire connection module; 110, central axis; 111, mounting groove; 120, sampling unit; 121, conductor; 122, sampling terminal; 200, cell wire connection module; 210, wire terminal; 300, conversion part; 310, dial ring; 311, limit card slot; 320, conductive block; 410, first housing; 411, operation window; 420, second housing; 510, first through hole; 520, fixing hole; 530, base; 531, second through hole; 540, cover plate; 541, third through hole; 550, baffle; 600, sampling wire harness. Detailed implementation manners

[0040] Next, the technical solutions of the present application will be described clearly and completely in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] Figure 11 Schematic diagram of the BMS sampling system. Refer to Figure 11 As shown, currently, the battery simulation system is managed by the BMS. The BMS includes a BMS main board and a BMS slave board. The BMS slave board uses an AFE acquisition board, and the AFE acquisition board is equipped with an AFE chip. Signals such as the temperature and voltage of the cells in the battery simulation system are transmitted to the AFE acquisition board through the sampling wire harness 600. The AFE acquisition board transmits the acquired signals to the BMS main board, and the BMS main board manages the battery simulation system. The present application improves the sampling wire harness 600, enabling a set of sampling wire harnesses to be adapted to multiple AFE configurations.

[0042] Next, in conjunction with Figures 1 - 10 , the sampling wire harness connection device provided in the embodiment of the present application will be described.

[0043] Refer to Figure 1As shown, in the embodiment provided by the present application, the sampling wire harness connection device includes a sampling wire connection module 100, a battery cell wire connection module 200, and a conversion part 300. The sampling wire connection module 100 has a plurality of sampling units 120, and each sampling unit 120 is respectively used to connect to a corresponding sampling wire; the battery cell wire connection module 200 has a plurality of wire terminals 210, and each wire terminal 210 is respectively used to connect to a corresponding battery cell wire; there are a plurality of conversion parts 300, and the conversion parts 300 are arranged between the sampling wire connection module 100 and the battery cell wire connection module 200. The conversion parts 300 are connected to the wire terminals 210 in a one-to-one correspondence. Each conversion part 300 rotates around its own axis to electrically connect the corresponding wire terminal 210 to any one of the sampling units 120. In some specific embodiments, the sampling wire harness connection device further includes a first housing 410 and a second housing 420. A receiving cavity is jointly formed between the first housing 410 and the second housing 420. The sampling wire connection module 100, the battery cell wire connection module 200, and the conversion parts 300 are all arranged in the receiving cavity. An operation window 411 communicating with the receiving cavity is opened on the first housing 410, and a part of the conversion part 300 can be exposed from the operation window 411, so as to facilitate rotating the conversion part 300 at the position of the operation window 411, making the conversion part 300 rotate around its own axis, so that the corresponding wire terminal 210 is electrically connected to the target sampling unit 120. In some specific embodiments, a plurality of first through holes 510 are respectively opened at one end of the first housing 410 and the second housing 420. The first through holes 510 are arranged in a one-to-one correspondence with the sampling units 120. The sampling wires can extend into the first through holes 510 and be electrically connected to the sampling units 120 in a one-to-one correspondence respectively; a base 530 is formed on the second housing 420, and a plurality of second through holes 531 are spaced apart on the base 530. The wire terminals 210 are respectively arranged in the second through holes 531, and the battery cell wires can extend into the second through holes 531 and be electrically connected to the wire terminals 210 in a one-to-one correspondence respectively.

[0044] By using the technical solution provided by the above embodiment of the present application, by providing the conversion part 300 and making the conversion part 300 rotate around its own axis, the corresponding wire terminal 210 can be electrically connected to any one of the sampling units 120, and further the electrical connection between any sampling wire and any battery cell wire can be realized. Thus, the connection relationship between the sampling wire harnesses can be quickly changed, enabling the sampling wire harness to adaptively build a sampling environment with multi-channel transformation, effectively improving the development efficiency, shortening the development cycle, reducing the development cost, being conducive to the maintenance of the sampling environment, and being able to improve the utilization rate of the sampling environment.

[0045] Refer to Figure 2 、 Figure 3As shown, in some embodiments provided by the present application, the sampling line connection module 100 includes a central axis 110. The sampling units 120 are annularly arrayed around the axis of the central axis 110 on the side wall of the central axis 110, and the conversion parts 300 are arranged along the axial direction of the central axis 110 and sleeved on the outer surface of the sampling units 120. Specifically, the conversion parts 300 are in a ring structure, and the conversion parts 300 have conductive structures. The conductive structure of each conversion part 300 is always electrically connected to the corresponding wire terminal 210. Specifically, the central axis 110 is made of an insulating material. Thus, by rotating the conversion parts 300 around the axis of the central axis 110, the relative positions of the conversion parts 300 and the sampling units 120 can be changed, enabling the conductive structures to be electrically connected to different sampling units 120, so that different sampling units 120 can be electrically connected to the corresponding wire terminals 210 through the conductive structures. In some specific embodiments, fixing holes 520 are respectively formed at the end parts of the first housing 410 and the second housing 420. Threaded holes are also provided at both ends of the central axis 110, and both ends of the central axis 110 are fixedly connected to the first housing 410 and the second housing 420 respectively through fixing bolts. In some specific embodiments, mounting grooves 111 are formed on the side wall of the central axis 110 in an annular array, and the length direction of the mounting grooves 111 is the same as the axial direction of the central axis 110. The sampling units 120 are respectively arranged in the corresponding mounting grooves 111. Thus, the conversion parts 300 can be sleeved on the central axis 110, and by rotating the conversion parts 300, the conductive structures on the conversion parts 300 can be brought into contact with the sampling units 120 in the mounting grooves 111 to achieve electrical connection.

[0046] Referring to Figure 8 As shown, each sampling unit 120 respectively includes a conductor 121 and a sampling terminal 122. The length direction of the conductor 121 is the same as the axial direction of the central axis 110. There are multiple sampling terminals 122, which are arranged at intervals along the length direction of the conductor 121. Specifically, the conductor 121 is in a columnar shape, and the sampling terminals 122 are welded to the side wall of the conductor 121, and the sampling terminals 122 extend radially outward along the conductor 121. For example Figure 8 as shown in Figure 2 , Figure 3As shown, there are a total of fifteen conductors 121, which are the first conductor, the second conductor, …, the fifteenth conductor in clockwise order. Among them, the first to fourteenth conductors are respectively electrically connected to the corresponding sampling lines, and the fifteenth conductor is used to be connected to the ground wire. The first sampling terminals on all the conductors are located on the same circumference, the second sampling terminals on all the conductors are also located on the same circumference, and so on, …, the fourteenth sampling terminals on all the conductors are also located on the same circumference; correspondingly, there are also fourteen conversion parts 300, which are the first conversion part, the second conversion part, …, the fourteenth conversion part in order from left to right along the axial direction of the conductor 121; among them, the first conversion part is sleeved on the central axis 110 at the position corresponding to the first sampling terminals of all the conductors, the second conversion part is sleeved on the central axis 110 at the position corresponding to the second sampling terminals of all the conductors, and so on, the fourteenth conversion part is sleeved on the central axis 110 at the position corresponding to the fourteenth sampling terminals of all the conductors; referring to Figure 2 As shown, there are also fourteen wire terminals 210, which are the first wire terminal, the second wire terminal, …, the fourteenth wire terminal in order from left to right along the length direction of the second housing 420. Among them, the first wire terminal is in contact connection with the first conversion part, the second wire terminal is in contact connection with the second conversion part, and so on, …, the fourteenth wire terminal is in contact connection with the fourteenth conversion part. At the same time, each wire terminal 210 is respectively electrically connected to the corresponding battery cell wire; thus, by rotating the first conversion part, the battery cell wire electrically connected to the first wire terminal can be electrically connected to any one of the fourteen sampling lines; similarly, by rotating the second conversion part, the battery cell wire electrically connected to the second wire terminal can be electrically connected to any one of the fourteen sampling lines; thus, it can be realized that each battery cell wire can be electrically connected to any sampling line, so as to quickly change the connection relationship between the sampling wire bundles, make the sampling wire bundles adaptively build a sampling environment with multi-channel transformation, effectively improve the development efficiency, shorten the development cycle, and reduce the development cost.

[0047] Referring to Figure 2As shown, in some specific embodiments, one end of the installation groove 111 penetrates through the central axis 110, the other end of the installation groove 111 abuts against the end wall of the central axis 110, the bottom of the installation groove 111 is an arc groove that is shape-matched with the conductor 121, and the conductor 121 is fixedly installed by means of clearance fit with the inner wall of the arc groove; the sampling terminal 122 extends towards the notch of the installation groove 111 along the depth direction of the installation groove 111, so as to be able to abut against the conversion part 300. In some specific embodiments, the sampling terminal 122 is a spring pogo pin. The spring pogo pin specifically includes a barrel, a spring and a needle tip. The spring and the needle tip are respectively arranged in the barrel. The outer end of the needle tip extends out of the barrel. One end of the spring abuts against the inner end of the needle tip, and the other end of the spring abuts against the inner bottom of the barrel; thus, the spring can provide an elastic force for the needle tip to abut against the conversion part 300, so that the sampling terminal 122 and the conversion part 300 can maintain spring abutment, which is beneficial to protecting the sampling terminal 122 and at the same time ensuring stable contact between the sampling terminal 122 and the conversion part 300 to achieve stable conduction.

[0048] Refer to Figure 9 , Figure 10As shown, in some embodiments provided by the present application, the conversion unit 300 includes a dial ring 310 and a conductive block 320. The dial ring 310 has an annular structure. The inner ring of the dial ring 310 is an insulating layer, and the outer ring of the dial ring 310 is a conductive layer. The conductive block 320 is disposed on the dial ring 310. One end of the conductive block 320 is connected to the conductive layer, and the other end of the conductive block 320 is used to connect to any sampling unit 120. In some embodiments, the dial ring 310 has an inner ring and an outer ring. The outer ring is sleeved on the inner ring. The outer ring of the dial ring 310 is made of a conductive material, and the inner ring of the dial ring 310 is made of an insulating material. The conductive block 320 is embedded in the dial ring 310 along the radial direction of the dial ring 310. In other embodiments, the inner ring of the dial ring 310 is coated with an insulating material, and the outer ring of the dial ring 310 is coated with a conductive material. The conductive block 320 is embedded in the dial ring 310 along the radial direction of the dial ring 310. Thus, the outer ring of the dial ring 310 is conductive and the inner ring is insulating. During the rotation of the dial ring 310, the outer ring is always in contact with the wire terminal 210 to achieve electrical connection. When the conductive block 320 rotates to contact the corresponding wiring terminal, the corresponding wiring terminal can be electrically connected to the wiring terminal through the conductive block 320. In some specific embodiments, a notch is provided on the dial ring 310, and the conductive block 320 is disposed at the notch. Specifically, T-shaped blocks are respectively provided on the left and right sides of the conductive block 320, and T-shaped slots are correspondingly provided at the notch position. The T-shaped blocks slide along the radial direction of the dial ring 310 into the T-shaped slots, so that the conductive block 320 is installed at the notch of the dial ring 310. In this way, it is convenient to replace the conductive block 320 after wear. In some specific embodiments, limiting slots 311 are formed in an annular array along the outer ring of the dial ring 310. When the dial ring 310 rotates, the wire terminal 210 slides on the outer ring of the dial ring 310. When the wire terminal 210 is snapped into the limiting slot 311, it means that the conductive block 320 is in contact with the sampling terminal 122 on one of the conductors 121. At the same time, by snapping the wire terminal 210 into the limiting slot 311, the dial ring 310 can be limited to prevent the dial ring 310 from continuing to rotate. In some specific embodiments, marks are provided on the outer surface of the outer ring of the dial ring 310. The marks are 1, 2,..., 14, GND in clockwise order. When the dial ring 310 rotates, the marks can be successively exposed from the operation window 411 of the first housing 410. Thus, it can be judged which sampling terminal 122 on which conductor 121 the conductive block 320 on the dial ring 310 is in contact with through the exposed marks. For example, when rotating the first dial ring to expose the mark "3" at the operation window 411 of the first housing 410, it can be judged that at this time, the conductive block 320 on the first dial ring is electrically connected to the first sampling terminal on the third conductor, that is, the cell wire corresponding to the first dial ring is electrically connected to the sampling wire corresponding to the third conductor.

[0049] Refer to Figure 5 、 Figure 6 、 Figure 7As shown, in some embodiments provided by the present application, the battery cell wire connection module 200 further includes a cover plate 540. The cover plate 540 is installed on the base 530. Third through holes 541 are spaced apart on the cover plate 540. The diameter of the third through holes 541 is smaller than the diameter of the second through holes 531. The ends of the wire terminals 210 are respectively abutted against one end of the third through holes 541. In this way, the cover plate 540 can prevent the wire terminals 210 from moving outwards. At the same time, the battery cell wires can extend into the third through holes 541 to contact the wire terminals 210 to achieve electrical connection. In some specific embodiments, the wire terminals 210 are spring-loaded pins. The spring-loaded pin specifically includes a barrel, a spring and a needle tip. The spring and the needle tip are respectively arranged in the barrel. The outer end of the needle tip extends out of the barrel. One end of the spring abuts against the inner end of the needle tip, and the other end of the spring abuts against the inner bottom of the barrel. In this way, the spring can provide an elastic force to make the needle tip abut against the conversion part 300, so that the wire terminals 210 and the conversion part 300 can maintain spring abutment, which is beneficial to protecting the wire terminals 210 and at the same time ensuring stable contact between the wire terminals 210 and the conversion part 300 to achieve stable conduction.

[0050] Referring to Figure 4 , Figure 5 As shown, in some embodiments provided by the present application, a baffle 550 is provided on the inner wall of the accommodation cavity. The baffle 550 is located between two adjacent conversion parts 300. The baffle 550 is an insulating plate. By providing the baffle 550 between two adjacent conversion parts 300, insulation can be maintained between the two adjacent conversion parts 300. At the same time, it can also play a role in limiting the conversion part 300 to prevent the conversion part 300 from shifting axially along the central axis 110.

[0051] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0055] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A sampling wire harness connection device, characterized in that, Comprising: A sampling line connection module, having a plurality of sampling units, each of the sampling units being respectively used for connecting with a corresponding sampling line; A battery cell wire connection module, having a plurality of wire terminals, each of the wire terminals being respectively used for connecting with a corresponding battery cell wire; A plurality of conversion parts, arranged between the sampling line connection module and the battery cell wire connection module, the conversion parts being connected to the wire terminals in one-to-one correspondence, and each of the conversion parts making the corresponding wire terminal electrically connected to any one of the sampling units by rotating around its own axis.

2. The sampling wire harness connection device according to claim 1, characterized in that: The sampling line connection module includes a central axis, and the sampling units are annularly arrayed around the axis of the central axis on the side wall of the central axis, and the conversion parts are arranged along the axial direction of the central axis and sleeved on the outer surface of the sampling units.

3. The sampling wire harness connection device according to claim 2, characterized in that Each of the sampling units respectively includes: A conductor, the length direction of the conductor being the same as the axial direction of the central axis; A plurality of sampling terminals, arranged at intervals along the length direction of the conductor on the conductor, and the sampling terminals are respectively arranged opposite to the corresponding conversion parts.

4. The sampling wire harness connection device according to claim 2, characterized in that: The side wall of the central axis is provided with mounting grooves in an annular array, the length direction of the mounting grooves being the same as the axial direction of the central axis, and the sampling units are arranged in the mounting grooves.

5. The sampling wire harness connection device according to any one of claims 1-4, characterized in that, The conversion part includes: A dial ring, the dial ring being in a ring structure, the inner ring of the dial ring being an insulating layer, and the outer ring of the dial ring being a conductive layer; A conductive block, arranged on the dial ring, one end of the conductive block being connected to the conductive layer, and the other end of the conductive block being used for connecting with any one of the sampling units.

6. The sampling wire harness connection device according to claim 5, wherein: The outer ring of the dial ring is provided with limiting card slots in an annular array.

7. The sampling wire harness connection device according to claim 5, characterized in that: It further includes a first housing and a second housing, a receiving cavity is jointly formed between the first housing and the second housing, and an operation window communicating with the receiving cavity is opened on the first housing.

8. The sampling wire harness connection device according to claim 7, characterized in that: First through holes are respectively opened at the end parts of the first housing and the second housing, and the first through holes are arranged in one-to-one correspondence with the sampling units; And / or, fixing holes are respectively opened at the end parts of the first housing and the second housing; And / or, a base is formed on the second housing, second through holes are spacedly opened on the base, and the wire terminals are respectively arranged in the second through holes in one-to-one correspondence; the battery cell wire connection module further includes a cover plate, the cover plate is installed on the base, third through holes are spacedly opened on the cover plate, the diameter of the third through holes is smaller than the diameter of the second through holes, and the end parts of the wire terminals are respectively abutted against one end of the third through holes.

9. The sampling wire harness connection device according to claim 7, wherein: A baffle is arranged on the inner wall of the receiving cavity, and the baffle is located between two adjacent conversion parts.

10. The sampling wire harness connection device according to claim 3, wherein: The wire terminals and the sampling terminals are respectively spring thimbles.

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