Output pole structure and battery pack

Abstract

The utility model discloses an output pole structure and a battery pack, the output pole structure comprises: a base comprising a base body, a first busbar and a limiting connecting piece, one end of the first busbar is located in the base body, the other end of the first busbar extends out of the base body, the limiting connecting piece is a metal piece and is arranged on the base body, and the limiting connecting piece is suitable for being in welding connection with an end plate; the plug-in comprises a shell and a second busbar, the shell is connected with the seat body, the shell and the seat body are insulating parts, one end of the second busbar is located in the shell and electrically connected with the end, located in the seat body, of the first busbar, and the other end of the second busbar extends out of the shell. According to the output pole structure provided by the utility model, the seat body can be fixed on the end plate through the welding connection between the limiting connecting piece and the end plate, so that the fixed connection between the output pole structure and the end plate is realized, and the welding connection is high in connection rigidity and simple in connection structure; therefore, the connection efficiency and the connection strength of the output pole structure and the end plate can be well improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an output pole structure and a battery pack. Background Art

[0002] With the increasingly serious environmental and energy problems, the research and production of electric vehicles are getting more and more attention. Among them, as a key component of electric vehicles, the safety of power batteries is of crucial importance. Among them, in a battery pack, an output pole is usually used to realize the electrical connection between the battery pack and an external circuit, and the output pole is usually arranged on an end plate. However, the connection strength between the output pole and the end plate in the related art is not good, and the output pole is extremely easy to fall off when stressed, directly affecting the reliability of the battery pack. Therefore, improvement is needed. Summary of the Utility Model

[0003] A first aspect of the utility model provides an output pole structure, which has the advantage of high connection strength with an end plate.

[0004] The output pole structure according to an embodiment of the first aspect of the utility model is used for a battery pack. The battery pack includes the output pole structure and an end plate. The output pole structure is arranged on the end plate. The output pole structure includes: a base, including a seat body, a first bus bar and a limiting connecting piece. One end of the first bus bar is located inside the seat body, and the other end of the first bus bar extends out of the seat body. The limiting connecting piece is a metal piece and is arranged on the seat body. The limiting connecting piece is suitable for being welded to the end plate; a plug-in part, including a housing and a second bus bar. The housing is connected to the seat body, and the housing and the seat body are insulating parts. One end of the second bus bar is located inside the housing and is electrically connected to one end of the first bus bar located inside the seat body, and the other end of the second bus bar extends out of the housing.

[0005] According to the output pole structure of the embodiment of the first aspect of the utility model, through the welded connection between the limiting connecting piece and the end plate, the seat body can be fixed on the end plate, so as to realize the fixed connection between the output pole structure and the end plate. Moreover, the welded connection has a large connection stiffness and a simple connection structure, so that the connection efficiency and connection strength between the output pole structure and the end plate can be better improved.

[0006] According to some embodiments of the utility model, the bottom of the seat body is provided with a plug-in column, and an installation groove is formed on the end plate of the battery pack. The plug-in column is suitable for being inserted into the installation groove.

[0007] According to some embodiments of the utility model, the limiting connecting piece and the plug-in column are located on different sides of the seat body.

[0008] According to some embodiments of the present utility model, a first insertion portion is formed on one side of the seat body facing the housing. An insertion slot that opens towards the housing is formed inside the first insertion portion. A connection nut is provided inside the insertion slot. A clamping protrusion is formed on the outer peripheral surface of the first insertion portion. A second insertion portion is formed on one side of the housing facing the seat body. A through hole that penetrates the housing along the axial direction of the insertion slot is formed inside the second insertion portion. A connection bolt that is screwed to the connection nut is provided inside the through hole. A clamping arm is formed on the housing at the outer peripheral side of the second insertion portion. A clamping hole that is in clamping cooperation with the clamping protrusion is formed on the clamping arm.

[0009] According to some embodiments of the present utility model, a limiting groove that extends along the extending direction of the insertion slot is formed on the inner peripheral surface of the insertion slot. A limiting protrusion is formed on the outer peripheral surface of the second insertion portion. The limiting protrusion is slidably arranged inside the limiting groove along the extending direction of the insertion slot.

[0010] According to some embodiments of the present utility model, a plurality of the clamping protrusions, the clamping arms, the limiting grooves, and the limiting protrusions are all provided and are evenly spaced apart along the circumferential direction of the insertion slot.

[0011] According to some embodiments of the present utility model, the number of the clamping protrusions, the clamping arms, the limiting grooves, and the limiting protrusions is the same.

[0012] According to some embodiments of the present utility model, an insulating layer is provided on the surface of the head of the connection bolt. The plug further includes an installation handle that is integrally injection-molded with the insulating layer. The installation handle is configured to separate from the insulating layer when the torque between the installation handle and the insulating layer is greater than a preset torque threshold.

[0013] According to some embodiments of the present utility model, the housing is an integrally injection-molded part; and / or, the seat body is an integrally injection-molded part.

[0014] A second aspect of the present utility model proposes a battery pack.

[0015] The battery pack according to the embodiments of the second aspect of the present utility model includes: the above output pole structure; an end plate; and a battery module. The end plate is located on one side of the battery module. One end of the first busbar that extends out of the seat body is electrically connected to the battery module.

[0016] For the battery pack according to the embodiments of the second aspect of the present utility model, the seat body can be fixed on the end plate through the welded connection of the limiting connecting piece and the end plate, so as to realize the fixed connection between the output pole structure and the end plate. Moreover, the welded connection has a large connection stiffness and a simple connection structure, so that the connection efficiency and connection strength between the output pole structure and the end plate can be better improved, and further the stability of the battery pack can be improved.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0018] Figure 1 is a schematic diagram of an output pole structure and an end plate according to an embodiment of the present utility model;

[0019] Figure 2 is an exploded view of an output pole structure according to an embodiment of the present utility model;

[0020] Figure 3 is a schematic diagram of an output pole structure according to an embodiment of the present utility model, wherein the mounting handle is not separated;

[0021] Figure 4 is a schematic diagram of an output pole structure according to an embodiment of the present utility model, wherein the mounting handle is separated;

[0022] Figure 5 is a schematic diagram of a plug-in of an output pole structure according to an embodiment of the present utility model mounted to a base at another angle;

[0023] Figure 6 is a schematic diagram of a base of an output pole structure according to an embodiment of the present utility model;

[0024] Figure 7 is a front view of a base of an output pole structure according to an embodiment of the present utility model;

[0025] Figure 8 is a left view of a base of an output pole structure according to an embodiment of the present utility model;

[0026] Figure 9 is a top view of a base of an output pole structure according to an embodiment of the present utility model;

[0027] Figure 10 is a schematic diagram of a plug-in of an output pole structure according to an embodiment of the present utility model;

[0028] Figure 11 is a front view of a plug-in of an output pole structure according to an embodiment of the present utility model;

[0029] Figure 12 is a bottom view of a plug-in of an output pole structure according to an embodiment of the present utility model;

[0030] Figure 13 is a top view of a plug-in of an output pole structure according to an embodiment of the present utility model;

[0031] Figure 14 is a schematic diagram of a battery pack according to an embodiment of the present utility model.

[0032] Reference numerals:

[0033] 100, battery pack; 10, output terminal structure; 1, base; 11, base body; 111, first plugging part; 112, plugging groove; 113, clamping projection; 114, limiting groove; 12, first bus bar; 13, limiting connecting piece; 14, plugging post; 15, connecting nut; 2, plug-in unit; 21, housing; 211, second plugging part; 212, through hole; 213, clamping arm; 214, clamping hole; 215, limiting projection; 22, second bus bar; 23, connecting bolt; 24, installation handle; 20, end plate; 30, battery module. Detailed implementation manners

[0034] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the applicability of other processes and / or the use of other materials.

[0036] The output terminal structure 10 according to the first aspect embodiment of the present invention will be described below with reference to the drawings.

[0037] As Figures 1 to 14As shown, the output terminal structure 10 according to the first aspect embodiment of the present utility model is used for a battery pack 100. The battery pack 100 includes an output terminal structure 10 and an end plate 20. The output terminal structure 10 is provided on the end plate 20. The output terminal structure 10 includes: a base 1 and a plug-in member 2. The base 1 includes a seat body 11, a first bus bar 12, and a limit connecting member 13. One end of the first bus bar 12 is located inside the seat body 11, and the other end of the first bus bar 12 extends out of the seat body 11. The limit connecting member 13 is a metal member and is provided on the seat body 11. The limit connecting member 13 is adapted to be welded to the end plate 20. The plug-in member 2 includes a housing 21 and a second bus bar 22. The housing 21 is connected to the seat body 11, and the housing 21 and the seat body 11 are insulating members. One end of the second bus bar 22 is located inside the housing 21 and is electrically connected to one end of the first bus bar 12 located inside the seat body 11. The other end of the second bus bar 22 extends out of the housing 21.

[0038] That is to say, after the base 1 and the plug-in member 2 are assembled in place, one end of the first bus bar 12 located inside the seat body 11 is connected to one end of the second bus bar 22 located inside the housing 21. One end of the first bus bar 12 located outside the seat body 11 facilitates the electrical connection between the first bus bar 12 and the battery module 30. One end of the second bus bar 22 located outside the housing 21 facilitates the electrical connection between the second bus bar 12 and the external circuit. Thus, the battery module 30 can be electrically connected to the external circuit through the first bus bar 12 and the second bus bar 22 to realize the transmission of current. Among them, through the welded connection between the limit connecting member 13 and the end plate 20, the seat body 11 can be fixed on the end plate 20, thereby realizing the fixed connection between the output terminal structure 10 and the end plate 20. And the welded connection has a large connection stiffness and a simple connection structure, so that the connection efficiency and connection strength between the output terminal structure 10 and the end plate 20 can be better improved.

[0039] For the output terminal structure 10 according to the first aspect embodiment of the present utility model, through the welded connection between the limit connecting member 13 and the end plate 20, the seat body 11 can be fixed on the end plate 20, thereby realizing the fixed connection between the output terminal structure 10 and the end plate 20. And the welded connection has a large connection stiffness and a simple connection structure, so that the connection efficiency and connection strength between the output terminal structure 10 and the end plate 20 can be better improved.

[0040] In some embodiments, the first bus bar 12 is a copper member, and an aluminum bar is welded to one end of the first bus bar 12 extending out of the seat body 11. In some other embodiments, the first bus bar 12 is an aluminum member.

[0041] According to some embodiments of the present utility model, a plug post 14 is provided at the bottom of the seat body 11, and an installation groove is formed on the end plate 20. The plug post 14 is adapted to be inserted into the installation groove. That is to say, on the basis of the welded connection between the seat body 11 and the end plate 20 through the limit connecting piece 13, the seat body 11 is also inserted and connected to the end plate 20 through the plug post 14. Thus, the connection position between the base 1 and the end plate 20 can be better increased, so as to improve the connection strength between the output pole structure 10 and the end plate 20 to prevent the output pole structure 10 from falling off the end plate 20. In addition, the matching mode of the insertion connection is simple, so that the connection difficulty between the output pole structure 10 and the end plate 20 can be reduced on the basis of improving the connection strength between the output pole structure 10 and the end plate 20. In addition, after the plug post 14 is inserted into the installation groove, the limit connecting piece 13 is welded to the end plate 20. Thus, through the cooperation between the plug post 14 and the installation groove, the position of the limit connecting piece 13 on the end plate 20 can be better positioned, and the connection difficulty between the limit connecting piece 13 and the end plate 20 can be reduced.

[0042] According to some embodiments of the present utility model, the limit connecting piece 13 and the plug post 14 are located on different sides of the seat body 11. That is to say, the limit connecting piece 13 can be arranged on other sides of the seat body 11 except the bottom. Thus, the step of the limit connecting piece 13 interfering with the insertion of the plug post 14 into the installation groove can be better avoided, and at the same time, a larger operation space can be provided for the welding connection of the limit connecting piece 13 to reduce the welding difficulty of the limit connecting piece 13.

[0043] In a specific example, one end of the limit connecting piece 13 is fixed on the side of the seat body 11 away from the plug post 14, the other end of the limit connecting piece 13 extends along the extension direction of the plug post 14 towards the bottom of the seat body 11, and the other end of the limit connecting piece 13 is located outside the plug post 14. After the plug post 14 is inserted into the installation groove, the limit connecting piece 13 abuts against the side surface of the end plate 20 outside the installation groove, and then the other end of the limit connecting piece 13 can be fixed on the outer side surface of the end plate 20 by welding.

[0044] According to some embodiments of the present utility model, a first insertion part 111 is formed on one side of the seat body 11 facing the housing 21. An insertion groove 112 is formed in the first insertion part 111 and opens towards the housing 21. A connection nut 15 is arranged in the insertion groove 112. A clamping protrusion 113 is formed on the outer peripheral surface of the first insertion part 111. A second insertion part 211 is formed on one side of the housing 21 facing the seat body 11. A through hole 212 is formed in the second insertion part 211 and penetrates through the housing 21 along the axial direction of the second insertion part 211. A connection bolt 23 screwed with the connection nut 15 is arranged in the through hole 212. A clamping arm 213 is formed on the housing 21 on the outer peripheral side of the second insertion part 211. A clamping hole 214 engaged with the clamping protrusion 113 is formed on the clamping arm 213.

[0045] That is to say, during the process of inserting the plug-in unit 2 into the base 1, the second plugging portion 211 is gradually inserted into the plugging slot 112 until the latching protrusion 113 cooperates with the latching hole 214 on the latching arm 213. Through the cooperation between the latching protrusion 113 and the latching hole 214, the relative position of the base body 11 and the housing 21 in the extending direction of the plugging slot 112 can be well maintained. Moreover, when the latching protrusion 113 cooperates with the latching hole 214, it indicates that the base body 11 and the housing 21 are installed in place. At this time, by applying a tightening force to the connecting bolt 23 to make it approach the connecting nut 15 and realizing the fixed connection between the base 1 and the plug-in unit 2 through screwing with the connecting nut 15. Thus, through the cooperation between the latching protrusion 113 and the latching hole 214, a good pre-positioning effect can be provided for the connection between the connecting bolt 23 and the connecting nut 15, which is beneficial to improving the connection efficiency between the connecting bolt 23 and the connecting nut 15. And, through the cooperation between the latching protrusion 113 and the latching hole 214, the connection stability between the base body 11 and the housing 21 can be well improved, thereby improving the connection stability between the base 1 and the plug-in unit 2.

[0046] In addition, the cooperation position between the latching protrusion 113 and the latching hole 214 is located on the outer peripheral side of the first plugging portion 111, which is convenient for the operator to operate on the latching protrusion 113 to release the latching relationship between the latching protrusion 113 and the latching hole 214, thereby reducing the difficulty of disassembling the base body 11 and the housing 21.

[0047] In a specific example, the first bus bar 12 is electrically connected to the connecting nut 15. A first conductive ring is provided on the first bus bar 12. The first conductive ring is sleeved on the outer peripheral side of the connecting nut 15 and is electrically connected to the connecting nut 15. A second conductive ring is provided on the second bus bar 22. The connecting bolt 23 passes through the second conductive ring. When the base 1 is connected to the plug-in unit 2, the first conductive ring and the second conductive ring are abutted against each other along the axial direction of the connecting bolt 23. At the same time, the head of the connecting bolt 23 abuts against the second conductive ring, so that the first bus bar 12 and the second bus bar 22 are electrically connected.

[0048] According to some embodiments of the present invention, a limiting groove 114 extending along the extending direction of the plugging slot 112 is formed on the inner peripheral surface of the plugging slot 112, and a limiting protrusion 215 is formed on the outer peripheral surface of the second plugging portion 211. The limiting protrusion 215 is slidably arranged in the limiting groove 114 along the extending direction of the plugging slot 112. That is to say, when the first plugging portion 111 is inserted into the plugging slot 112, by aligning the limiting protrusion 215 with the limiting groove 114 and inserting it, and through the limitation of the limiting groove 114 on the limiting protrusion 215, the installation direction of the first plugging portion 111 when inserted into the plugging slot 112 can be well limited, and the rotation of the first plugging portion 111 relative to the plugging slot 112 can be well avoided, thereby improving the connection reliability between the base body 11 and the housing 21.

[0049] According to some embodiments of the present utility model, a plurality of snap protrusions 113, snap arms 213, limiting grooves 114 and limiting protrusions 215 are provided at uniformly spaced intervals along the circumferential direction of the insertion slot 112. Among them, the plurality of snap protrusions 113 are in one-to-one snap fit with the plurality of snap holes 214 on the plurality of snap arms 213, so that the connection positions between the base body 11 and the housing 21 after being inserted in place can be better increased, thereby improving the strength for providing pre-positioning for the connection of the connection bolt 23 and the connection nut 15, and at the same time improving the connection strength between the base body 11 and the housing 21. In addition, the plurality of limiting grooves 114 are in one-to-one cooperation with the plurality of limiting protrusions 215, so that multiple limits can be formed between the first insertion portion 111 and the second insertion portion 211, thereby improving the limiting effect of the second insertion portion 211 on the installation of the first insertion portion 111, and further improving the connection reliability between the base body 11 and the housing 21.

[0050] According to some embodiments of the present utility model, the number of the snap protrusions 113, the snap arms 213, the limiting grooves 114 and the limiting protrusions 215 is the same. Thus, the housing 21 can be flexibly installed on the base 1 at a suitable angle according to the installation requirements, that is, the plug-in 2 can have multiple different installation angles relative to the base 1, so that the output pole structure 10 can be flexibly adapted to different installation requirements, which is beneficial to improving the application range of the output pole structure 10.

[0051] In a specific example, four snap protrusions 113, four snap arms 213, four limiting grooves 114 and four limiting protrusions 215 are provided.

[0052] According to some embodiments of the present utility model, an insulating layer is provided on the head surface of the connection bolt 23, so that the risk of electric shock caused by accidental contact with the connection bolt 23 can be better avoided, which is beneficial to improving the safety protection performance of the output pole structure 10. The plug-in 2 further includes an installation handle 24 integrally injection-molded with the insulating layer, and the installation handle 24 is configured to separate from the insulating layer when the torque between the installation handle 24 and the insulating layer is greater than a preset torque threshold. That is to say, the tightening force can be applied to the connection bolt 23 by rotating the installation handle 24. After the connection bolt 23 and the connection nut 15 are tightened, continuing to apply a rotational force to the installation handle 24 will cause relative rotation between the installation handle 24 and the insulating layer and separation from the insulating layer in the extreme state. Thus, the preset torque threshold can be set according to the tightening torque of the connection bolt 23 and the connection nut 15, so as to avoid applying too large a tightening force to the connection bolt 23. And when the installation handle 24 is separated from the insulating layer, it indicates that the connection bolt 23 and the connection nut 15 have been tightened at this time, so that the step of manually detecting and judging whether the connection bolt 23 and the connection nut 15 are tightened can be omitted, thereby reducing the labor cost and being beneficial to improving the production efficiency and production rhythm.

[0053] In a specific example, the preset torque threshold range for the installation handle 24 to be separated from the insulating layer is from 8 N·m to 10 N·m, so that while ensuring the connection strength between the connecting bolt 23 and the connecting nut 15, excessive tightening force applied to the connecting bolt 23 can be avoided, preventing fatigue of the connecting bolt 23.

[0054] According to some embodiments of the present utility model, the housing 21 is an integrally injection-molded part. Thus, the integrally formed structure can not only ensure the structural and performance stability of the housing 21, but also is convenient for molding, simple in manufacturing, and eliminates the fitting parts and connection processes used for connection, with low production costs.

[0055] Specifically, during the production process of the plug-in unit 2, the connecting bolt 23 and the second bus bar 22 can be encapsulated into the housing 21 through an injection molding process, while forming the second insertion part 211, the clamping arm 213, the clamping hole 214, the through hole 212 and the limiting protrusion 215. Moreover, the insulating layer and the installation handle 24 can be injection-molded on the head of the connecting bolt 23 at the same time, thereby eliminating the process of connecting multiple components of the plug-in unit 2 one by one, which is beneficial to improving the production efficiency of the plug-in unit 2.

[0056] According to some embodiments of the present utility model, the base body 11 is an integrally injection-molded part. Thus, the integrally formed structure can not only ensure the structural and performance stability of the base body 11, but also is convenient for molding, simple in manufacturing, and eliminates the fitting parts and connection processes used for connection, with low production costs.

[0057] Specifically, during the production process of the base 1, the first bus bar 12, the limiting connecting piece 13 and the connecting nut 15 can be encapsulated into the base body 11 through an injection molding process, while forming the first insertion part 111, the insertion groove 112, the clamping protrusion 113, the limiting groove 114 and the insertion post 14, eliminating the process of connecting multiple components of the base 1 one by one, which is beneficial to improving the production efficiency of the base 1.

[0058] Next, the battery pack 100 according to the second aspect embodiments of the present utility model will be described with reference to the accompanying drawings.

[0059] The battery pack 100 according to the second aspect embodiments of the present utility model includes: an output pole structure 10, an end plate 20 and a battery module 30. The end plate 20 is located on one side of the battery module 30, and one end of the first bus bar 12 extending out of the base body 11 is electrically connected to the battery module 30. Among them, through the welded connection between the limiting connecting piece 13 and the end plate 20, the base body 11 can be fixed on the end plate 20, thereby realizing the fixed connection between the output pole structure 10 and the end plate 20. Moreover, the welded connection has a large connection stiffness and a simple connection structure, so that the connection efficiency and connection strength between the output pole structure 10 and the end plate 20 can be better improved, and further the stability of the battery pack 100 can be improved.

[0060] According to the battery pack 100 of the second aspect embodiment of the present utility model, the seat body 11 can be fixed on the end plate 20 through the welded connection between the limiting connecting piece 13 and the end plate 20, so as to realize the fixed connection between the output pole structure 10 and the end plate 20. Moreover, the welded connection has a large connection stiffness and a simple connection structure, so that the connection efficiency and connection strength between the output pole structure 10 and the end plate 20 can be better improved, and further the stability of the battery pack 100 can be improved.

[0061] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0062] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means 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 the present utility model. In this specification, the schematic representations of the above terms do 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.

[0063] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An output electrode structure for a battery pack, characterized in that: The battery pack includes the output pole structure and an end plate, wherein the output pole structure is arranged on the end plate, and the output pole structure includes: The base comprises a base body, a first bus bar and a position-limiting connector, wherein one end of the first bus bar is located in the base body, and the other end of the first bus bar extends out of the base body, and the position-limiting connector is a metal part and is arranged on the base body, and the position-limiting connector is suitable for being welded to the end plate; The plug-in comprises a shell and a second bus, wherein the shell is connected to the base and the shell and the base are insulating parts, one end of the second bus is located in the shell and is electrically connected to one end of the first bus located in the base, and the other end of the second bus extends out of the shell.

2. The output pole structure according to claim 1, characterized in that: The bottom of the seat body is provided with a plug-in column, and a mounting groove is formed on the end plate, and the plug-in column is suitable for being plugged into the mounting groove.

3. The output pole structure according to claim 2, characterized in that: The limiting connector and the plug-in column are located on different sides of the seat body.

4. The output pole structure according to claim 1, characterized in that: A first plug-in portion is formed on the side of the seat body facing the shell, a plug-in groove open toward the shell is formed in the first plug-in portion, a connecting nut is provided in the plug-in groove, a clamping protrusion is formed on the outer peripheral surface of the first plug-in portion, a second plug-in portion is formed on the side of the shell facing the seat body, a through hole is formed in the second plug-in portion and passes through the shell along the axial direction of the plug-in groove, a connecting bolt threadedly connected to the connecting nut is provided in the through hole, a clamping arm is formed on the shell on the outer peripheral side of the second plug-in portion, and a clamping hole clamped with the clamping protrusion is formed on the clamping arm.

5. The output pole structure according to claim 4, characterized in that: The inner circumference of the plug-in slot is formed with a limiting groove extending along the extension direction of the plug-in slot, and the outer circumference of the second plug-in portion is formed with a limiting protrusion, which is slidably arranged in the limiting groove along the extension direction of the plug-in slot.

6. The output pole structure according to claim 5, characterized in that: The clamping protrusion, the clamping arm, the limiting groove and the limiting protrusion are all provided in plurality and are evenly spaced and arranged along the circumference of the plug-in groove.

7. The output pole structure according to claim 6, characterized in that: The numbers of the clamping protrusions, the clamping arms, the limiting grooves and the limiting protrusions are the same.

8. The output pole structure according to claim 4, characterized in that: An insulating layer is provided on the head surface of the connecting bolt, and the plug-in further comprises a mounting handle integrally injection-molded with the insulating layer, wherein the mounting handle is configured to separate from the insulating layer when the torque between the mounting handle and the insulating layer is greater than a preset torque threshold.

9. The output pole structure according to claim 1, characterized in that: The shell is an integral injection-molded part; and / or the seat body is an integral injection-molded part.

10. A battery pack, characterized in that: include: The output pole structure according to any one of claims 1 to 9; End plate; The end plate is located at one side of the battery module, and one end of the first busbar extending out of the base is electrically connected to the battery module.

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