Battery pack and battery pack

Abstract

The utility model provides a battery pack and a battery pack, which comprise a box body, supporting structures, output pole supporting seats and output pole connecting structures, and the supporting structures are arranged on the outer side wall of the box body in pairs; the two ends of the output pole supporting base are arranged on the two supporting structures in a supporting mode respectively. The first sub-connecting sheet of the output pole connecting structure is connected with the flow deflectors located at the edges of the end parts of the battery cells, and the second sub-connecting sheet of the output pole connecting structure is bent away from one side of the notch of the accommodating groove and is connected with the output pole supporting seat. According to the utility model, the problems that the assembly holes are directly formed in the box body of the battery pack in the prior art, so that the copper bars between the adjacent modules, the fixing columns of the output pole supporting seat and the output pole connecting structure generate shear force due to the vibration of the modules under a vibration working condition; further, a flow deflector or a battery core pole connected with the output pole connecting structure is damaged, and the working reliability and the service life of the battery pack are influenced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and a battery module. Background Technology

[0002] In existing technologies, when the output electrode support is located on the side of the module, as referenced in patent CN217387451U, mounting holes are typically directly opened on the side of the module housing. The output electrode support is fixedly installed in the mounting holes with bolts to secure it to the module. The output electrode support has a fixing post. One end of the module's output electrode connection structure is used to connect to the current guide plate of the battery cell or to the terminal post of the end battery cell. The other end of the output electrode connection structure has a through hole. During installation, the through hole on the output electrode connection structure is passed through the fixing post to fix the output electrode connection structure to the output electrode support. When connecting the module to other modules, the two ends of the copper busbar are fixedly connected to the fixing posts of the two modules respectively.

[0003] Therefore, under vibration conditions, the copper busbars between adjacent modules, the fixing posts of the output electrode support, and the output electrode connection structure are subjected to shearing forces due to the vibration of the modules, which in turn leads to damage to the current guide plates or cell terminals connected to the output electrode connection structure, affecting the working reliability and service life of the battery pack. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery pack and battery stack to solve the problem that in the prior art, because the battery pack has assembly holes directly opened on the casing, the copper busbars between adjacent modules, the fixing posts of the output pole support, and the output pole connection structure are subjected to shearing forces due to the vibration of the modules, which leads to the damage of the current guide plate or cell pole connected to the output pole connection structure, thus affecting the working reliability and service life of the battery pack.

[0005] To achieve the above objectives, this utility model provides a battery pack, including a housing, a support structure, an output electrode support base, and an output electrode connection structure. The housing has a receiving groove for accommodating multiple battery cells. The support structures are arranged in pairs on the outer wall of the housing. The two ends of the output electrode support base are respectively supported on the two support structures, such that the output electrode support base is positioned at a distance from the outer wall of the housing. The first sub-connecting piece of the output electrode connection structure is connected to a guide plate located at the end edge of the multiple battery cells. The second sub-connecting piece of the output electrode connection structure is connected to the first sub-connecting piece, and the second sub-connecting piece is bent on the side facing away from the opening of the receiving groove and connected to the output electrode support base.

[0006] In one exemplary embodiment, the support structure is welded to the housing; and / or, the output pole support is detachably connected to the support structure.

[0007] In an exemplary embodiment, the support structure is arched and has a first mounting hole; the output electrode support has a second mounting hole at a position opposite to the first mounting hole; the battery pack also includes a first fastener, which passes through the second mounting hole and the first mounting hole in sequence to connect the output electrode support and the support structure.

[0008] In an exemplary embodiment, the support structure includes an arched body and a support column, wherein the two ends of the arched body are supported at the outer side wall of the box; the support column is disposed on the surface of the arched body facing the box, and the end of the support column away from the arched body is connected to the box; a first assembly hole penetrates the arched body and extends into the support column.

[0009] In an exemplary embodiment, the outer peripheral surface of the first fastener has a first external thread structure; the wall surface of the first mounting hole has a first internal thread structure for engaging with the first external thread structure; and / or, the wall surface of the second mounting hole has a second internal thread structure for engaging with the first external thread structure.

[0010] In an exemplary embodiment, the first mounting hole is a circular hole; the second mounting hole is a tapered hole, with the smaller end of the tapered hole facing the support structure and the larger end of the tapered hole facing away from the support structure; the first fastener is a countersunk screw, and the countersunk screw is housed in the tapered hole.

[0011] In an exemplary embodiment, the second sub-connecting piece has a third mounting hole; the output electrode support includes an electrode body and a lug structure, wherein a fourth mounting hole is provided at a position opposite to the third mounting hole on the electrode body; the lug structures are arranged in pairs on both sides of the electrode body, and each lug structure has a second mounting hole; the battery pack also includes a second fastener, which passes through the fourth mounting hole and the third mounting hole in sequence to connect the output electrode connection structure and the output electrode support.

[0012] In one exemplary embodiment, a portion of the surface of the pole body opposite to the support structure is recessed to form a receiving recess for accommodating at least a portion of the second sub-connecting piece; and / or, the thickness of the pole body is greater than the thickness of the lug structure.

[0013] In an exemplary embodiment, the third mounting hole is an oblong hole, and the length direction of the oblong hole extends along the direction from the opening of the receiving groove to the bottom of the groove; the fourth mounting hole is a circular hole, and the second fastener is a bolt.

[0014] According to another aspect of the present invention, a battery pack is provided, including a battery pack, wherein the battery pack is the battery pack described above.

[0015] The present invention provides a battery pack comprising a housing, a support structure, an output electrode support base, and an output electrode connection structure. The housing has a receiving groove for accommodating multiple battery cells. The support structures are arranged in pairs on the outer wall of the housing. The two ends of the output electrode support base are respectively supported on the two support structures, such that the output electrode support base is positioned at a distance from the outer wall of the housing. A first sub-connecting piece of the output electrode connection structure is connected to a guide plate located at the end edge of the multiple battery cells. A second sub-connecting piece of the output electrode connection structure is connected to the first sub-connecting piece, and the second sub-connecting piece is bent on the side facing away from the opening of the receiving groove and connected to the output electrode support base.

[0016] By pairing two support structures on the outer wall of the housing, and with the output electrode support base supported on both ends of the two support structures respectively, the output electrode support base is positioned at a distance from the outer wall of the housing, thus preventing direct connection between the output electrode support base and the housing. Under vibration conditions, vibration generated by the housing will not directly cause vibration of the output electrode support base. Furthermore, the first sub-connecting piece of the output electrode connection structure is connected to the guide plate located at the end edge of multiple cells, and the second sub-connecting piece of the output electrode connection structure is connected to the first sub-connecting piece. The second sub-connecting piece is bent on the side away from the groove opening of the receiving slot and connected to the output electrode support base. This ensures the reliability of the connection between the output electrode connection structure and the guide plate through the first sub-connecting piece, as well as the reliability of the connection between the output electrode connection structure and the output electrode support base through the second sub-connecting piece. Since the connection between the second sub-connecting piece and the output electrode support base is detached from the housing, the connection point will not generate shear force due to housing vibration, which could damage the second sub-connecting piece or even damage or failure of the output electrode connection structure along with the guide plate. This ensures the operational reliability of the battery pack and maximizes its service life. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a battery pack according to an alternative embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A magnified structural diagram at point A in the diagram;

[0020] Figure 3 It shows Figure 1 A schematic diagram of the internal structure of the battery pack in the image, omitting the cover.

[0021] Figure 4 It shows Figure 3 A schematic diagram of the battery pack housing structure;

[0022] Figure 5 It shows Figure 4 A magnified structural diagram at point B in the diagram;

[0023] Figure 6 It shows Figure 2 A schematic diagram of the output terminal support of the battery pack in the diagram;

[0024] Figure 7 It shows Figure 3 A schematic diagram of the output electrode connection structure of the battery pack when the current guide plate is in the connected state.

[0025] The above figures include the following reference numerals:

[0026] 10. Box body; 11. Receiving tank;

[0027] 20. Battery cells;

[0028] 30. Supporting structure; 31. First assembly hole; 32. Arched body; 33. Supporting column;

[0029] 40. Output pole support; 41. Second mounting hole; 42. Pole base body; 421. Fourth mounting hole; 422. Accommodating countersunk platform; 43. Lug structure;

[0030] 50. Output pole connection structure; 51. First sub-connector piece; 52. Second sub-connector piece; 521. Third mounting hole;

[0031] 60. Flow guide plate; 70. Cover. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] To address the problem in existing battery packs where mounting holes are directly drilled into the casing, causing shear forces to be generated between adjacent modules, the fixing posts of the output electrode support, and the output electrode connection structure under vibration conditions, which in turn leads to damage to the current guide plates or cell terminals connected to the output electrode connection structure, thus affecting the reliability and service life of the battery pack, this utility model provides a battery pack and a battery stack, wherein the battery stack includes multiple battery packs, which are the battery packs described above and below.

[0034] like Figures 1 to 7 As shown, the battery pack includes a housing 10, a support structure 30, an output electrode support 40, and an output electrode connection structure 50. The housing 10 has a receiving groove 11 for accommodating multiple battery cells 20. The support structures 30 are arranged in pairs on the outer side wall of the housing 10. The two ends of the output electrode support 40 are respectively supported on the two support structures 30 so that the output electrode support 40 is positioned at a distance from the outer side wall of the housing 10. The first sub-connecting piece 51 of the output electrode connection structure 50 is connected to the guide piece 60 located at the end edge of the multiple battery cells 20. The second sub-connecting piece 52 of the output electrode connection structure 50 is connected to the first sub-connecting piece 51, and the second sub-connecting piece 52 is bent away from the opening of the receiving groove 11 and connected to the output electrode support 40.

[0035] By pairing two support structures 30 on the outer wall of the housing 10, and with the output electrode support 40 supported on both ends of the two support structures 30 respectively, the output electrode support 40 is positioned at a distance from the outer wall of the housing 10. This ensures that the output electrode support 40 is not directly connected to the housing 10, and under vibration conditions, the vibration generated by the housing 10 will not directly cause the output electrode support 40 to vibrate. Furthermore, the first sub-connecting piece 51 of the output electrode connection structure 50 is connected to the guide piece 60 located at the end edge of the multiple battery cells 20, and the second sub-connecting piece 52 of the output electrode connection structure 50 is connected to the first sub-connecting piece 51, and the second sub-connecting piece 52... The side facing away from the slot opening of the receiving groove 11 is bent and connected to the output pole support 40 to ensure the reliability of the connection between the output pole connection structure 50 and the guide plate 60 through the first sub-connecting piece 51, and to ensure the reliability of the connection between the output pole connection structure 50 and the output pole support 40 through the second sub-connecting piece 52. Since the connection between the second sub-connecting piece 52 and the output pole support 40 is detached from the housing 10, the connection between the two will not be damaged by shear force due to the vibration of the housing 10, or even the output pole connection structure 50 and the guide plate 60 will be damaged or the connection will fail. This ensures the working reliability of the battery pack and ensures that its service life can be as long as possible.

[0036] It should be noted that in this application, the guide plates 60 at the end edges of the multiple battery cells 20 are used to electrically connect the multiple battery cells 20 to the external structure. There are also guide plates 60, such as bar plates, between the multiple battery cells 20 to achieve electrical connection between the multiple battery cells 20.

[0037] It should be noted that in this application, the support structure 30 is welded to the housing 10; and / or, the output pole support base 40 is detachably connected to the support structure 30. This ensures the reliability of the connection between the support structure 30 and the housing 10, while eliminating the need for mounting holes in the housing 10 to fix the support structure 30, thus ensuring the overall structural strength of the housing 10. Furthermore, by making the output pole support base 40 and the support structure 30 detachably connected, the ease of installation and disassembly of both is ensured.

[0038] like Figures 1 to 5 As shown, the support structure 30 is arched and has a first mounting hole 31. The output electrode support 40 has a second mounting hole 41 at a position opposite to the first mounting hole 31. The battery pack also includes a first fastener, which passes through the second mounting hole 41 and the first mounting hole 31 in sequence to connect the output electrode support 40 and the support structure 30. In this way, the first fastener ensures the reliability of the connection between the support structure 30 and the output electrode support 40.

[0039] like Figure 4 and Figure 5 As shown, the support structure 30 includes an arched body 32 and a support column 33. The two ends of the arched body 32 are supported on the outer side wall of the housing 10. The support column 33 is disposed on the surface of the arched body 32 facing the housing 10, and the end of the support column 33 facing away from the arched body 32 is connected to the housing 10. A first mounting hole 31 passes through the arched body 32 and extends into the support column 33. Thus, by configuring the support structure 30 with an arched body 32 and a support column 33, it ensures that the first fastener passes through the second mounting hole 41 and extends into the first mounting hole 31 at the support column 33. This ensures reliable connection between the support structure 30 and the output electrode support 40, while also providing reliable support for the output electrode support 40.

[0040] It should be noted that, in this application, the outer peripheral surface of the first fastener has a first external thread structure; the wall surface of the first mounting hole 31 has a first internal thread structure for engaging with the first external thread structure; and / or, the wall surface of the second mounting hole 41 has a second internal thread structure for engaging with the first external thread structure. This ensures that the first fastener only needs to be screwed into the first mounting hole 31 by tightening, and / or that the first fastener only needs to be screwed into the second mounting hole 41 by tightening.

[0041] like Figure 6 As shown, the first mounting hole 31 is a circular hole; the second mounting hole 41 is a tapered hole, with the smaller end of the tapered hole facing the support structure 30 and the larger end facing away from the support structure 30; the first fastener is a countersunk screw, which is housed within the tapered hole. This helps prevent the countersunk screw from occupying a large portion of the battery pack's installation space.

[0042] like Figure 6 and Figure 7 As shown, the second sub-connecting piece 52 has a third mounting hole 521; the output electrode support 40 includes an electrode body 42 and a lug structure 43, and a fourth mounting hole 421 is provided at a position opposite to the third mounting hole 521 on the electrode body 42; the lug structures 43 are arranged in pairs on both sides of the electrode body 42, and each lug structure 43 has a second mounting hole 41; the battery pack also includes a second fastener, which passes through the fourth mounting hole 421 and the third mounting hole 521 in sequence to connect the output electrode connection structure 50 and the output electrode support 40. In this way, by setting the output electrode support 40 to include an electrode body 42 and a lug structure 43, the reliability of the electrode body 42 in receiving the second sub-connecting piece 52 and the reliability of the connection between the lug structure 43 and the support structure 30 are ensured.

[0043] like Figure 6 As shown, a portion of the surface of the base body 42 on the side opposite to the support structure 30 is recessed to form a receiving platform 422, which is used to receive at least a portion of the second sub-connecting piece 52. In this way, the receiving platform 422 serves to limit and position at least a portion of the second sub-connecting piece 52.

[0044] like Figure 6 As shown, the thickness of the base body 42 is greater than the thickness of the lug structure 43. This ensures that the depth of the fourth mounting hole 421 is large, so that the outer peripheral surface of the second fastener and the inner peripheral surface of the fourth mounting hole 421 have a large contact area.

[0045] Optionally, the fourth mounting hole 421 is a through hole.

[0046] Optionally, the fourth mounting hole 421 is a blind hole.

[0047] like Figure 6 and Figure 7As shown, there are at least two third mounting holes 521, spaced apart; there are at least two fourth mounting holes 421, each corresponding to one of the at least two third mounting holes 521; the outer circumferential surface of the second fastener has a second external thread structure; the hole wall of the third mounting hole 521 has a third internal thread structure for engaging with the second external thread structure; and / or, the hole wall of the fourth mounting hole 421 has a fourth internal thread structure for engaging with the second external thread structure. This ensures that the second fastener only needs to be screwed into the third mounting hole 521, and / or that the second fastener only needs to be screwed into the fourth mounting hole 421.

[0048] like Figure 6 and Figure 7 As shown, the third mounting hole 521 is an oblong hole, and the length of the oblong hole extends along the direction from the opening to the bottom of the receiving groove 11; the fourth mounting hole 421 is a circular hole, and the second fastener is a bolt. In this way, by setting the third mounting hole 521 as an oblong hole, and at the same time, the length of the oblong hole extends along the direction from the opening to the bottom of the receiving groove 11, the output pole connection structure 50 can have an up and down floating amount according to the guide plate 60 with different thicknesses.

[0049] It should be noted that in this application, the battery pack also includes a cover 70, which covers the opening of the receiving groove 11 of the housing 10.

[0050] The present invention provides a battery pack comprising a housing 10, a support structure 30, an output electrode support 40, and an output electrode connection structure 50. The housing 10 has a receiving groove 11 for accommodating multiple battery cells 20. The support structures 30 are arranged in pairs on the outer side wall of the housing 10. The two ends of the output electrode support 40 are respectively supported on the two support structures 30, so that the output electrode support 40 is positioned at a distance from the outer side wall of the housing 10. The first sub-connecting piece 51 of the output electrode connection structure 50 is connected to the guide piece 60 located at the end edge of the multiple battery cells 20. The second sub-connecting piece 52 of the output electrode connection structure 50 is connected to the first sub-connecting piece 51, and the second sub-connecting piece 52 is bent away from the opening of the receiving groove 11 and connected to the output electrode support 40.

[0051] By pairing two support structures 30 on the outer wall of the housing 10, and with the output electrode support 40 supported on both ends of the two support structures 30 respectively, the output electrode support 40 is positioned at a distance from the outer wall of the housing 10. This ensures that the output electrode support 40 is not directly connected to the housing 10, and under vibration conditions, the vibration generated by the housing 10 will not directly cause the output electrode support 40 to vibrate. Furthermore, the first sub-connecting piece 51 of the output electrode connection structure 50 is connected to the guide piece 60 located at the end edge of the multiple battery cells 20, and the second sub-connecting piece 52 of the output electrode connection structure 50 is connected to the first sub-connecting piece 51, and the second sub-connecting piece 52... The side facing away from the slot opening of the receiving groove 11 is bent and connected to the output pole support 40 to ensure the reliability of the connection between the output pole connection structure 50 and the guide plate 60 through the first sub-connecting piece 51, and to ensure the reliability of the connection between the output pole connection structure 50 and the output pole support 40 through the second sub-connecting piece 52. Since the connection between the second sub-connecting piece 52 and the output pole support 40 is detached from the housing 10, the connection between the two will not be damaged by shear force due to the vibration of the housing 10, or even the output pole connection structure 50 and the guide plate 60 will be damaged or the connection will fail. This ensures the working reliability of the battery pack and ensures that its service life can be as long as possible.

[0052] This utility model also provides a battery pack, including multiple battery groups as described in any of the above embodiments. Adjacent battery groups are connected to the output terminal connection structure 50 of two battery groups respectively by copper busbars, and the copper busbars are fixed by output terminal support bases 40 to achieve electrical connection between adjacent battery groups. This application does not limit the arrangement and number of multiple battery groups. For example, multiple battery groups can be stacked vertically or arranged side-by-side, etc., and can be adjusted according to actual needs.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, include: The housing (10) has a receiving slot (11) for accommodating multiple battery cells (20); Support structure (30), the support structure (30) is provided in pairs on the outer side wall of the box (10); Output pole support base (40), the two ends of the output pole support base (40) are respectively supported on the two support structures (30) so that the output pole support base (40) is set at a distance from the outer wall of the housing (10); The output electrode connection structure (50) has a first sub-connecting piece (51) connected to a guide piece (60) located at the end edge of the plurality of cells (20), a second sub-connecting piece (52) connected to the first sub-connecting piece (51), and the second sub-connecting piece (52) is bent away from the slot opening of the receiving groove (11) and connected to the output electrode support (40).

2. The battery pack according to claim 1, characterized in that, The supporting structure (30) is welded to the housing (10); and / or, The output pole support (40) is detachably connected to the support structure (30).

3. The battery pack according to claim 1, characterized in that, The support structure (30) is arched, and a first assembly hole (31) is provided on the support structure (30); The output pole support (40) has a second mounting hole (41) at a position opposite to the first mounting hole (31); The battery pack also includes a first fastener, which passes through the second mounting hole (41) and the first mounting hole (31) in sequence to connect the output terminal support (40) and the support structure (30).

4. The battery pack according to claim 3, characterized in that, The support structure (30) includes: An arched body (32) is provided at both ends of the arched body (32) on the outer side wall of the box (10); Support column (33) is provided on the surface of the arched body (32) facing the box (10), and the end of the support column (33) away from the arched body (32) is connected to the box (10). The first mounting hole (31) passes through the arched body (32) and extends into the support column (33).

5. The battery pack according to claim 3, characterized in that, The outer peripheral surface of the first fastener has a first external thread structure; The wall surface of the first assembly hole (31) has a first internal thread structure for mating with the first external thread structure; and / or, The wall surface of the second assembly hole (41) has a second internal thread structure for engaging with the first external thread structure.

6. The battery pack according to claim 5, characterized in that, The first assembly hole (31) is a circular hole; The second assembly hole (41) is a tapered hole, and the small end of the tapered hole is set towards the side of the support structure (30), while the large end of the tapered hole is set away from the side of the support structure (30). The first fastener is a countersunk screw, and the countersunk screw is housed within the tapered hole.

7. The battery pack according to claim 6, characterized in that, The second sub-connecting piece (52) has a third mounting hole (521); The output pole support (40) includes: The pole base body (42) has a fourth mounting hole (421) at a position opposite to the third mounting hole (521); Lug structure (43), the lug structure (43) is arranged in pairs on both sides of the pole body (42), and each lug structure (43) has the second mounting hole (41); The battery pack also includes: The second fastener passes through the fourth mounting hole (421) and the third mounting hole (521) in sequence to connect the output pole connection structure (50) and the output pole support (40).

8. The battery pack according to claim 7, characterized in that, The surface of the pole base body (42) on the side opposite to the support structure (30) is recessed to form a receiving platform (422), which is used to receive at least a portion of the second sub-connecting piece (52); and / or, The thickness of the base body (42) is greater than the thickness of the lug structure (43).

9. The battery pack according to claim 7, characterized in that, The third assembly hole (521) is a waist-shaped hole, and the length direction of the waist-shaped hole extends along the direction from the opening of the receiving groove (11) to the bottom of the groove; The fourth assembly hole (421) is a circular hole, and the second fastener is a bolt.

10. A battery pack, characterized in that, It includes multiple battery packs, wherein the battery packs are any one of claims 1 to 9.

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