Battery and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and a battery pack. In the battery, a top cover sheet is provided with a first surface and a second surface which are oppositely arranged along a first direction; a pole hole is formed in the top cover plate in the first direction and penetrates through the first surface and the second surface; the riveting block is located on the side, away from the second face, of the first face. The pole column comprises a first column body and a second column body, a column body groove is formed in the side, deviating from the first surface, of the first column body, the column body groove is sunken in the direction close to the second surface in the first direction, the second column body is partially arranged in the column body groove, the second column body is connected with the first column body, and the second column body located outside the column body groove is fixedly connected with the riveting block; and at least part of the first column body penetrates through the pole column hole. Part of the first column body is positioned in the pole hole, so that the space occupied by the pole in the first direction is relatively small, and the space occupied by the top cover plate, the riveting block and the pole in the first direction of the battery after being assembled is reduced.

Description

Technical Field

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

[0002] Batteries are used to power electric vehicles, and they can also be used in electric cars, electric airplanes, electric ships, and power tools, among other things. Therefore, battery technology is a crucial factor in the development of many industries.

[0003] However, existing batteries suffer from low internal space utilization. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery and battery pack to solve or partially solve the technical problem of low internal space utilization in existing batteries.

[0005] In a first aspect, this utility model provides a battery having a first direction. The battery includes a top cover, a riveting block, and a terminal post. The top cover has a first surface and a second surface disposed opposite to each other along the first direction. The top cover has a terminal post hole along the first direction, the terminal post hole penetrating the first surface and the second surface. The riveting block is located on the side of the first surface away from the second surface. The terminal post includes a first column and a second column. A portion of the first column is located within the terminal post hole. The end of the first column near the terminal post hole along the first direction passes through the first surface. The end of the first column away from the terminal post hole along the first direction has a column groove. The column groove is recessed along the first direction towards the second surface. A portion of the second column is disposed within the column groove. The second column is connected to the first column. The second column located outside the column groove is fixedly connected to the riveting block.

[0006] In some embodiments, the riveting block is provided with a through hole along the first direction, the through hole being connected to the pole hole, and the second column passing through the through hole; the riveting block is provided with a receiving groove on the side near the first surface, the receiving groove being connected to the through hole, the groove wall surrounding the first column, and the portion of the first column facing away from the first surface along the first direction being located within the receiving groove.

[0007] In some embodiments, the battery further includes a second insulating member and a connecting piece. The second insulating member is disposed on a side close to the second surface and is connected to the second surface. The connecting piece is located on a side of the second insulating member opposite to the second surface. The end of the first column near the electrode hole along the first direction is located inside the electrode hole. The groove of the column has a bottom wall, which is connected to the second column along the first direction. The bottom wall is located outside the electrode hole and is spaced apart from the first surface along the first direction. A portion of the connecting piece passes through the second insulating member and the second surface in sequence, is located inside the electrode hole, and is fixedly connected to the first column.

[0008] In some embodiments, the connecting piece is provided with a connecting portion, the connecting portion protruding in the first direction toward the first column, and the connecting portion passing through the second insulating member and fixedly connected to the first column.

[0009] In some embodiments, the connecting piece is provided with a first limiting protrusion, which protrudes along the first direction toward the direction close to the second insulating member; the second insulating member is provided with a second limiting protrusion, which protrudes along the first direction toward the direction close to the second surface to form a first positioning groove, and the first limiting protrusion is fitted into the first positioning groove; the second surface is provided with a second positioning groove, which is recessed along the first direction toward the direction close to the first surface, and the second limiting protrusion is fitted into the second positioning groove.

[0010] In some embodiments, the first limiting protrusion is a plurality of first protrusions, which are circumferentially spaced around the first column; the first positioning groove is a plurality of first grooves, which are circumferentially spaced around the first column, and each first protrusion is disposed in a first groove; the second positioning groove is a plurality of second grooves, which are circumferentially spaced around the first column, and each first groove is embedded in a second groove.

[0011] In some embodiments, the first limiting protrusion is a second protrusion, which is disposed around the first column; the first positioning groove is a first annular groove, which is disposed around the first column, and the second protrusion is disposed within the first annular groove; the second positioning groove is a second annular groove, which is disposed around the first column.

[0012] In some embodiments, the battery further includes a first insulating member surrounding the terminal post, the first insulating member including a main body portion connected to the first surface, the main body portion being disposed between the top cover and the riveting block; the battery further includes a sealing member surrounding the terminal post, the main body portion having a first groove on the side near the first surface, the first groove communicating with the terminal post hole, the sealing member including a second sealing portion located within the first groove, and the second sealing portion abutting against the main body portion and the terminal post hole along the first direction.

[0013] In some embodiments, the main body portion is further provided with a first insulating member protrusion on the side near the first surface. The first insulating member protrusion protrudes towards the first surface along the first direction, and the first insulating member protrusion is spaced apart from the second groove.

[0014] A third positioning groove is provided on the side of the first surface near the main body, and the first insulating member protrudes and is disposed in the third positioning groove.

[0015] Secondly, embodiments of the present invention provide a battery pack, which includes the battery as described above.

[0016] This utility model discloses a battery with a terminal post comprising a first post and a second post. A portion of the first post is located within a terminal post hole. The end of the first post facing away from the terminal post hole along a first direction has a post groove. The post groove is recessed towards a second surface along the first direction. A portion of the second post is located within the post groove and connected to the first post. The remaining portion of the second post is located outside the post groove and is fixedly connected to a riveting block. The portion of the first post located within the terminal post hole results in a relatively small space occupied by the terminal post in the first direction, reducing the space occupied by the terminal post in the first direction of the battery and thus improving the utilization rate of the battery's internal space.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the battery described in this utility model;

[0020] Figure 2 This is a schematic diagram of the exploded view of the battery described in this utility model;

[0021] Figure 3 This is an exploded view of the structure at the top cover plate of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the top cover plate structure described in this utility model;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure in the AA sectional view;

[0024] Figure 6 for Figure 5 A structural schematic diagram of part B in the enlarged view;

[0025] Figure 7 This is a schematic diagram of the connection between the pole post and the connecting piece described in this utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the top cover sheet described in this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the connecting piece described in this utility model;

[0028] Figure 10 This is a three-dimensional structural schematic diagram of the pole section described in this utility model;

[0029] Figure 11 for Figure 10 A schematic diagram of the structure in the CC section view;

[0030] Figure 12 This is a partial exploded view of the structure at the top cover plate of the present invention.

[0031] Figure 13 This is a schematic diagram of the structure described in this utility model;

[0032] Figure 14 This is a schematic diagram of the negative electrode post of this utility model.

[0033] Figure label:

[0034] 10. Pole post; 101. First column; 102. Second column; 103. Column groove; 104. Bottom wall;

[0035] 20. Top cover plate; 21. Pole post hole; 22. Second groove; 23. Second annular groove; 24. First surface; 25. Second surface; 26. First mounting hole; 27. Second positioning groove; 28. Third positioning groove;

[0036] 30. Connecting piece; 31. First protrusion; 32. Second protrusion; 33. Connecting part; 34. First limiting protrusion;

[0037] 40. Riveting block; 411. Through hole of rivet block; 412. Receiving groove; 42. Boss of rivet block;

[0038] 50. First insulating component; 51. First through hole; 52. First insulating component protrusion; 53. First groove; 54. Second groove; 55. Main body;

[0039] 60. Sealing element; 61. First sealing part; 62. Second sealing part;

[0040] 70. Second insulating component; 71. Second through hole; 72. First groove; 73. First annular groove; 74. Second limiting protrusion; 75. First positioning groove;

[0041] 80. Housing; 82. Battery cell; 821. Electrode; 83. Insulating film;

[0042] 90. Explosion-proof valve protective plate; 91. Explosion-proof valve;

[0043] Z, First direction. Detailed Implementation

[0044] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0045] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering. For example, "parallel" refers to the angle between two lines, a line and a surface, or a surface, where the angle is between -1° and 1°. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. For example, "perpendicular" refers to the angle between two lines, a line and a surface, or a surface, where the angle is between 89° and 91°. Equal distances or equal angles include not only absolute equality but also approximate equality as commonly understood in engineering, meaning there may be a certain degree of error, such as a tolerance range of -1% to 1%.

[0046] The applicant noted that when using a flanged injection-molded top cover sheet for the battery, the flanged manufacturing process is more difficult, and the thickness of the electrode area in the top cover sheet is thinner. After assembly with the electrodes and sealing rings, the top cover sheet is more prone to deformation under the influence of the sealing ring's rebound force, which cannot guarantee mechanical performance. When using a plate-shaped top cover sheet for the battery, the top cover sheet has sufficient mechanical strength, but after assembly with the electrodes and sealing rings, it occupies a large space in the height direction of the battery, resulting in a low internal space utilization rate.

[0047] In view of this, embodiments of this application provide a battery that solves the problem of low utilization rate of internal space in current batteries.

[0048] In some embodiments, refer to Figures 1 to 14 As shown, a battery is provided. The battery has a first direction Z. The battery includes a top cover plate 20, a riveting block 40, and a terminal post 10. The top cover plate 20 has a first surface 24 and a second surface 25 disposed opposite to each other along the first direction Z. The top cover plate 20 is provided with a terminal post hole 21 along the first direction Z, and the terminal post hole 21 penetrates the first surface 24 and the second surface 25. The riveting block 40 is located on the side of the first surface 24 away from the second surface 25. The terminal post 10 includes a first column 101 and a second column 102, and a portion of the first column 101 is located on the side opposite to the second surface 25. Inside the pole hole 21, the end of the first column 101 close to the pole hole 21 along the first direction Z passes through the first surface 24. The end of the first column 101 away from the pole hole 21 along the first direction Z is provided with a column groove 103. The column groove 103 is recessed along the first direction Z towards the second surface 25. The second column 102 is partially disposed in the column groove 103. The second column 102 is connected to the first column 101. The second column 102 located outside the column groove 103 is fixedly connected to the riveting block 40.

[0049] In this application, the battery has a first direction Z, which is the height direction of the battery and is the same as the first direction of the top cover 20.

[0050] The battery of this application embodiment includes a first column 101 and a second column 102. A portion of the first column 101 is located inside the column hole 21. The end of the first column 101 away from the column hole 21 along the first direction Z is provided with a column groove 103. The column groove 103 is recessed along the first direction Z towards the second surface 25. A portion of the second column 102 is located inside the column groove 103. The second column 102 is connected to the first column 101. The remaining portion of the second column 102 is located outside the column groove 103. The second column 102 located outside the column groove 103 is fixedly connected to the riveting block 40. The first column 101 is partially located in the electrode hole 21, which makes the space occupied by the electrode 10 in the first direction Z relatively small. Compared with the structure of some electrodes in the prior art that include an upper column and a lower column, and the upper column and the lower column are fixedly connected along the first direction Z, the present application reduces the space occupied by the electrode 10 in the first direction of the battery because the second column 102 is partially located in the column groove 103, thereby improving the utilization rate of the internal space of the battery.

[0051] Furthermore, the second column 102 is partially disposed within the column groove 103 of the first column 101 to achieve the connection between the second column 102 and the first column 101. Compared with the prior art where the lower surface of the upper column and the upper surface of the lower column are connected by friction welding, the pole column 10 in this application can reduce the risk of connection failure between the second column 102 and the first column 101 when subjected to shear force perpendicular to the first direction Z.

[0052] In some embodiments, such as Figure 3 and Figure 11 As shown, the riveting block 40 along the first direction Z has a through hole 411, which is connected to the pole hole 21. The second column 102 passes through the through hole 411. The riveting block 40 has a receiving groove 412 on the side near the first surface 24. The receiving groove 412 is connected to the through hole 411. The groove wall of the receiving groove 412 surrounds the first column 101. The part of the first column 101 facing away from the first surface 24 along the first direction Z is located in the receiving groove 412.

[0053] In this embodiment, the second column 102, located outside the column groove 103, passes through the riveting block through hole 411 and is fixedly connected to the riveting block 40. The portion of the first column 101 facing away from the first surface 24 along the first direction Z is located within the receiving groove 412 and connected to the riveting block 40. Both the second column 102 and the first column 101 are connected to the riveting block 40, ensuring a stable connection between the electrode post 10 and the riveting block 40. Furthermore, the space occupied by the second column 102 and the first column 101 in the first direction Z partially overlaps with the space occupied by the riveting block 40 in the first direction Z, reducing the space occupied by the top cover 20, the riveting block 40, and the electrode post 10 in the battery height direction after assembly, thereby improving the utilization rate of the battery's internal space.

[0054] In some embodiments, to increase the reliability of the connection, the second column 102 and the riveting block 40 are welded together.

[0055] In some embodiments, the battery further includes a second insulating member 70 and a connecting piece 30. The second insulating member 70 is disposed on the side near the second surface 25 and is connected to the second surface 25. A portion of the connecting piece 30 is located on the side of the second insulating member 70 away from the second surface 25. The end of the first column 101 near the electrode hole 21 along the first direction Z is located inside the electrode hole 21. The column groove 103 has a bottom wall 104. The bottom wall 104 is connected to the second column 102 along the first direction Z. The bottom wall 104 is located outside the electrode hole 21, and the bottom wall 104 and the first surface 24 are spaced apart along the first direction Z. A portion of the connecting piece 30 passes through the second insulating member 70 and the second surface 25 in sequence inside the electrode hole 21 and is fixedly connected to the first column 101.

[0056] In this embodiment, the second insulating member 70 is used to insulate the top cover plate 20 and the terminal post 10. A portion of the connecting piece 30 passes through the second insulating member 70 and the second surface 25 is located in the terminal post hole 21 and connected to the first post 101. The first post 101 can be set relatively small in the first direction Z to reduce the space occupied by the terminal post 10 in the first direction Z, thereby improving the utilization rate of the internal space of the battery.

[0057] In some embodiments, the connecting piece 30 is provided with a connecting portion 33, which protrudes along the first direction Z towards the first pillar 101. The connecting portion 33 passes through the second insulating member 70 and is fixedly connected to the first pillar 101. In the above structure of the embodiments of this application, the connecting portion 33 passes through the second insulating member 70 and is fixedly connected to the first pillar 101. The first pillar 101 can be set relatively small in the first direction Z to reduce the space occupied by the electrode post 10 in the first direction Z, thereby improving the utilization rate of the internal space of the battery.

[0058] The connecting part 33 protrudes along the first direction Z towards the first column 101. Compared with the structure with a protrusion on the connecting piece, the connecting piece 30 of this application does not need to be processed separately to create a protrusion structure, thus saving process steps.

[0059] Further reference Figure 6 As shown, part of the first column 101 is located inside the electrode hole 21, and the end of the second column 102 along the first direction Z close to the first column 101 does not exceed the second surface 25, so as to prevent the electrolyte in the shell from coming into contact with the composite interface of the first column 101 and the second column 102.

[0060] Furthermore, the connecting portion 33 of the connecting piece 30 is also inserted into the electrode hole 21, and the connection position of the second column 102 and the connecting portion 33 is located inside the electrode hole 21, thereby reducing the space occupied in the first direction Z and improving the utilization rate of the internal space of the battery.

[0061] In some embodiments, the second insulating member 70 is provided with a second through hole 71, which is connected to the pole post hole 21. The connecting part 33 passes through the second through hole 71 and extends into the pole post hole 21. The connection position of the second column 102 and the connecting part 33 is located inside the pole post hole 21.

[0062] In some embodiments, the connecting piece 30 is provided with a first limiting protrusion 34, which protrudes along the first direction Z toward the direction close to the second insulating member 70; the second insulating member 70 is provided with a second limiting protrusion 74, which protrudes along the first direction Z toward the direction close to the second surface 25 to form a first positioning groove 75, and the first limiting protrusion 34 is fitted into the first positioning groove 75; the second surface 25 is provided with a second positioning groove 27, which is recessed along the first direction Z toward the direction close to the first surface 24, and the second limiting protrusion 74 is fitted into the second positioning groove 27.

[0063] During battery assembly, the first limiting protrusion 34 is fitted into the first positioning groove 75 to limit the position between the connecting piece 30 and the second insulating member 70. The second limiting protrusion 74 is fitted into the second positioning groove 27 to limit the position between the second insulating member 70 and the top cover piece 20, thereby ensuring accurate positioning between the connecting piece 30 and the second insulating member 70, and between the second insulating member 70 and the top cover piece 20, without any deviation.

[0064] In some embodiments, the first limiting protrusion 34 comprises a plurality of first protrusions 31, which are circumferentially spaced around the first column 101; the first positioning groove 75 comprises a plurality of first grooves 72, which are circumferentially spaced around the first column 101, with each first protrusion 31 disposed within one first groove 72; the second positioning groove 27 comprises a plurality of first grooves 72, which are circumferentially spaced around the first column 101, with each first groove 72 embedded within one second groove 22. In the above structure of the embodiments of this application, the arrangement of the first protrusions 31, the first grooves 72, and the first grooves 72 can achieve limiting between the connecting piece 30, the second insulating member 70, and the top cover piece 20, thereby ensuring accurate positional connection between the connecting piece 30 and the second insulating member 70, and between the second insulating member 70 and the top cover piece 20; and effectively preventing rotation between the connecting piece 30 and the second insulating member 70, and between the second insulating member 70 and the top cover piece 20.

[0065] Understandably, the number of the first protrusion 31 is set according to usage requirements, for example, referring to... Figure 9 As shown, four first protrusions 31 are provided, and the four first protrusions 31 are arranged circumferentially around the first column 101. Correspondingly, four first grooves 72 are also provided.

[0066] In other embodiments, the first limiting protrusion 34 is a second protrusion 32, which surrounds the first pillar 101; the first positioning groove 75 is a first annular groove 73, which surrounds the first pillar 101, and the second protrusion 32 is disposed within the first annular groove 73; the second positioning groove 27 is a second annular groove 23, which surrounds the first pillar 101, and the second limiting protrusion 74 is disposed within the second annular groove 23. In the above structure of the embodiments of this application, the arrangement of the second protrusion 32, the first annular groove 73, and the second annular groove 23 can realize the limiting between the connecting piece 30, the second insulating member 70, and the top cover piece 20, thereby ensuring accurate positional connection between the connecting piece 30 and the second insulating member 70, and between the second insulating member 70 and the top cover piece 20.

[0067] In some embodiments, refer to Figure 12 As shown, the second protrusion 32, the first annular groove 73, and the second annular groove 23 are all quadrilateral to prevent rotation between the connecting piece 30 and the second insulating member 70, and between the second insulating member 70 and the top cover piece 20. Meanwhile, compared to the first protrusion 31, the second protrusion 32 presses against the second insulating member 70, increasing the contact area and the force applied.

[0068] In some embodiments, the battery further includes a first insulating member 50, which surrounds the terminal post 10. The first insulating member 50 includes a main body portion 55, which is connected to the first surface 24 and is disposed between the top cover plate 20 and the riveting block 40. The battery further includes a sealing member 60, which surrounds the terminal post 10. The main body portion 55 has a second groove 54 on the side near the first surface 24, which communicates with the terminal post hole 21. The sealing member 60 includes a second sealing portion 62, which is located in the second groove 54 and abuts against the main body portion 55 and the terminal post hole 21 along the first direction Z.

[0069] In this embodiment, the main body 55 of the first insulating member 50 is connected to the first surface 24, and the main body 55 is disposed between the top cover plate 20 and the riveting block 40. The first insulating member 50 is used for insulation between the riveting block 40 and the top cover plate 20. The second sealing part 62 of the sealing member 60 is located in the second groove 54, and the second sealing part 62 abuts against the main body 55 and the pole hole 21 along the first direction Z, so that the sealing member 60 can effectively achieve sealing and avoid leakage.

[0070] In one embodiment, reference is made to Figure 3and Figure 11 As shown, a first groove 53 is provided at one end of the first insulating member 50 facing away from the top cover plate 20 along the first direction Z, and a second groove 54 is provided at the other end of the first insulating member 50 facing the top cover plate 20. A first through hole 51 penetrates the bottom of the first groove 53 and the bottom of the second groove 54, connecting the first groove 53 and the second groove 54. The first through hole 51 communicates with the pole post hole 21. A rivet block boss 42 is provided at one end of the riveting block 40 facing the first surface 24. The rivet block boss 42 is located in the first groove 53, and the first post 101 passes through the first through hole 51.

[0071] In this embodiment, a rivet block boss 42 is provided at one end of the rivet block 40 facing the first surface 24, and the rivet block boss 42 is disposed in the first groove 53, which can better achieve insulation between the rivet block 40 and the top cover plate 20.

[0072] In some embodiments, the seal 60 further includes a first sealing portion 61 disposed along a first direction Z. The first sealing portion 61 is disposed around the pole post 10 and located between the top cover plate 20 and the side wall of the first post 101, thereby achieving a seal between the top cover plate 20 and the first post 101. Therefore, the seal 60 in this embodiment can achieve a seal between the top cover plate 20 and the first post 101, as well as between the first insulating member 50 and the top cover plate 20, preventing leakage and other issues.

[0073] In one embodiment, the main body 55 is further provided with a first insulating member protrusion 52 on the side near the first surface 24. The first insulating member protrusion 52 protrudes along the first direction Z towards the first surface 24, and the first insulating member protrusion 52 is spaced apart from the second groove 54.

[0074] The first surface 24 is provided with a third positioning groove 28 on the side near the main body 55, and the first insulating member protrusion 52 is disposed in the third positioning groove 28.

[0075] Specifically, there can be multiple first insulating member protrusions 52, which are circumferentially spaced around the second groove 54; the first surface is provided with multiple third positioning grooves 28, which are circumferentially spaced around the pole post 10, and each first insulating member protrusion 52 is disposed in the corresponding third positioning groove 28 to achieve the limiting between the first insulating member 50 and the top cover plate 20, ensure the accurate installation between the first insulating member 50 and the top cover plate 20, and prevent rotation between the first insulating member 50 and the top cover plate 20.

[0076] In some embodiments, the electrode post 10 includes a positive electrode post and a negative electrode post. The positive and negative electrode posts can have the same structure, with the positive electrode post including a first post 101 and a second post 102, and the negative electrode post including a first post 101 and a second post 102. Alternatively, the positive and negative electrode posts can have different structures. For example, the negative electrode post may include a first post 101 and a second post 102, where the first post 101 is a copper post and the second post 102 is an aluminum post. (The positive electrode post is referenced...) Figure 14 As shown, the positive electrode post is a single structural component; for example, the positive electrode post is an aluminum electrode post.

[0077] In some embodiments, refer to Figure 3 As shown, the battery also includes an explosion-proof valve protection plate 90 and an explosion-proof valve 91; a first mounting hole 26 is provided on the top cover plate 20, and the explosion-proof valve protection plate 90 is disposed in the first mounting hole 26. The explosion-proof valve 91 is disposed between the explosion-proof valve protection plate 90 and the second insulating member 70, and the explosion-proof valve protection plate 90 and the explosion-proof valve 91 are used for battery explosion protection.

[0078] In some embodiments, the electrode post 10 is a composite electrode post, such as a copper-aluminum composite electrode post. The two can be formed by solid-liquid bonding. The copper-aluminum composite electrode post has the advantages of being thinner and having higher reliability. It is understood that the specific material of the electrode post 10 is not limited in the embodiments of this application, as long as it meets the usage requirements.

[0079] In some embodiments, refer to Figure 1 and Figure 2 As shown, the battery also includes a casing 80, a battery cell 82, and an insulating film 83. A receiving cavity is formed within the casing 80, and the battery cell 82 is disposed within the receiving cavity. To prevent leakage and further protect the battery cell 82, an insulating film 83 is also provided between the casing 80 and the battery cell 82. A tab 821 is provided at the end of the battery cell 82 in the first direction Z. The tab 821 is connected to a connecting piece 30 to electrically connect the battery cell 82 to the terminal post 10. The casing 80 is connected to a top cover plate 20 at the end in the first direction Z, and the top cover plate 20 seals the receiving cavity.

[0080] In some embodiments, the battery assembly process is as follows, referring to... Figures 3 to 11 As shown, and refer to Figure 3 The left side shown:

[0081] The connection portion 33 between the pole post 10 and the connecting piece 30 is laser-welded. The first sealing portion 61 of the sealing member 60 is placed in the pole post hole 21 of the top cover plate 20, and the second sealing portion 62 is placed in the second groove 54 of the first insulating member 50. The compression of the sealing member 60 is controlled by the joint compression of the riveting block 40, the first insulating member 50, and the top cover plate 20. The integral piece of the welded pole post 10 and the connecting piece 30 is connected to the riveting block 40, that is, the pole post 10 is pressed into contact with the through hole 411 of the riveting block. The first limiting protrusion 34 on the connecting piece 30, the second limiting protrusion 74 on the second insulating member 70, and the second positioning groove 27 on the top cover plate 20 are pressed into contact. The second column 102 of the pole post 10 is laser-welded to the riveting block 40 to fix the pole post 10.

[0082] Figure 3 The connection method of the left and right parts shown is the same, and will not be repeated in this embodiment.

[0083] In this embodiment of the battery, the terminal post 10 includes a first post 101 and a second post 102. The first post 101 has a post groove 103 at its end along the first direction Z. Part of the second post 102 is disposed within the post groove 103, and the remaining part of the second post 102 is disposed outside the post groove 103. The second post 102 disposed outside the post groove 103 is fixedly connected to the riveting block 40 within the riveting block through hole 411. Part of the first post 101 is located within the terminal post hole 21, and the connecting portion 33 of the connecting piece 30 is also disposed within the terminal post hole 21. The connection position of the second post 102 and the connecting portion 33 is located within the terminal post hole 21. The above-described connection structure of the terminal post 10 results in a smaller space occupied by the top cover 20, riveting block 40, connecting piece 30, and terminal post 10 in the first direction of the battery after assembly, thereby improving the utilization rate of the internal space of the battery.

[0084] This application also provides a battery pack including the battery as described above. The battery described above has the advantage of high internal space utilization, enabling the battery pack to achieve higher energy density and offering greater design flexibility.

[0085] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0086] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For embodiments of devices, electronic devices, computer-readable storage media, and computer program products containing instructions, the descriptions are relatively simple because they are basically similar to the method embodiments; relevant parts can be referred to the descriptions of the method embodiments.

[0087] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A battery, characterized in that, The battery has a first orientation (Z) and includes: The top cover plate (20) has a first surface (24) and a second surface (25) disposed opposite to each other along the first direction (Z); the top cover plate (20) is provided with a pole hole (21) along the first direction (Z), the pole hole (21) penetrating the first surface (24) and the second surface (25); The rivet block (40) is located on the side of the first surface (24) opposite to the second surface (25); The pole post (10) includes a first pole body (101) and a second pole body (102). A portion of the first pole body (101) is located inside the pole post hole (21). The end of the first pole body (101) near the pole post hole (21) along the first direction (Z) passes through the first surface (24). The end of the first pole body (101) away from the pole post hole (21) along the first direction (Z) is provided with a pole body groove (103). The pole body groove (103) is recessed along the first direction (Z) towards the second surface (25). A portion of the second pole body (102) is located inside the pole body groove (103). The second pole body (102) is connected to the first pole body (101). The second pole body (102) located outside the pole body groove (103) is fixedly connected to the riveting block (40).

2. The battery according to claim 1, characterized in that, The riveting block (40) along the first direction (Z) is provided with a through riveting block through hole (411), the riveting block through hole (411) is connected to the pole hole (21), and the second column (102) passes through the riveting block through hole (411); The rivet block (40) has a receiving groove (412) on the side near the first surface (24). The receiving groove (412) is connected to the through hole (411) of the rivet block. The groove wall of the receiving groove (412) surrounds the first column (101). Along the first direction (Z), the part of the first column (101) away from the first surface (24) is located in the receiving groove (412).

3. The battery according to claim 1, characterized in that, The battery also includes a second insulating member (70) and a connecting piece (30). The second insulating member (70) is disposed on the side close to the second surface (25) and is connected to the second surface (25). The connecting piece (30) is partially located on the side of the second insulating member (70) away from the second surface (25). The end of the first column (101) near the pole hole (21) along the first direction (Z) is located inside the pole hole (21). The column groove (103) has a bottom wall (104). The bottom wall (104) is connected to the second column (102) along the first direction (Z). The bottom wall (104) is located outside the pole hole (21). The bottom wall (104) and the first surface (24) are spaced apart along the first direction (Z). A portion of the connecting piece (30) passes through the second insulating member (70) and the second surface (25) in sequence. The second surface (25) is located inside the pole hole (21) and is fixedly connected to the first column (101).

4. The battery according to claim 3, characterized in that, The connecting piece (30) is provided with a connecting part (33), which protrudes along the first direction (Z) toward the first column (101) and is fixedly connected to the second insulating member (70) and the first column (101).

5. The battery according to claim 3, characterized in that, The connecting piece (30) is provided with a first limiting protrusion (34), which protrudes along the first direction (Z) toward the direction close to the second insulating member (70); The second insulating member (70) is provided with a second limiting protrusion (74), which protrudes along the first direction (Z) toward the direction close to the second surface (25) to form a first positioning groove (75), and the first limiting protrusion (34) is fitted into the first positioning groove (75); The second surface (25) is provided with a second positioning groove (27), which is recessed along the first direction (Z) towards the first surface (24), and the second limiting protrusion (74) is embedded in the second positioning groove (27).

6. The battery according to claim 5, characterized in that, The first limiting protrusion (34) is a plurality of first protrusions (31), and the plurality of first protrusions (31) are arranged circumferentially around the first column (101); The first positioning groove (75) is a plurality of first grooves (72), and the plurality of first grooves (72) are arranged circumferentially around the first column (101), and each first protrusion (31) is disposed in one of the first grooves (72). The second positioning groove (27) is a plurality of second grooves (22), which are arranged circumferentially around the first column (101), and each first groove (72) is embedded in a second groove (22).

7. The battery according to claim 5, characterized in that, The first limiting protrusion (34) is a second protrusion (32), and the second protrusion (32) is arranged around the first column (101); The first positioning groove (75) is a first annular groove (73), which surrounds the first column (101), and the second protrusion (32) is disposed in the first annular groove (73); The second positioning groove (27) is a second annular groove (23), which surrounds the first column (101).

8. The battery according to claim 1, characterized in that, The battery also includes a first insulating member (50), which is disposed around the terminal post (10). The first insulating member (50) includes a main body (55), which is connected to the first surface (24). The main body (55) is disposed between the top cover plate (20) and the riveting block (40). The battery also includes a seal (60) surrounding the terminal post (10). The main body (55) has a second groove (54) on the side near the first surface (24). The second groove (54) communicates with the terminal post hole (21). The seal (60) includes a second sealing part (62) located in the second groove (54) and abuts against the main body (55) and the terminal post hole (21) along the first direction (Z).

9. The battery according to claim 8, characterized in that, The main body (55) is also provided with a first insulating member protrusion (52) on the side near the first surface (24). The first insulating member protrusion (52) protrudes towards the first surface (24) along the first direction (Z). The first insulating member protrusion (52) is spaced apart from the second groove (54). The first surface (24) is provided with a third positioning groove (28) on the side near the main body (55), and the first insulating member protrusion (52) is disposed in the third positioning groove (28).

10. A battery pack, characterized in that, Includes the battery as described in any one of claims 1-9.

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