Housing assembly and battery

Abstract

A housing assembly and a battery. The housing assembly comprises a conductive shell (10); the conductive shell (10) is provided with an accommodating cavity (101); the accommodating cavity (101) is provided with a first open end (103) in a first direction; a first mounting surface (104) is formed on the conductive shell (10); the first mounting surface (104) is arranged to be perpendicular to the first direction; the first mounting surface (104) is provided with a first mounting hole (1041) communicated with the accommodating cavity (101); a first cover plate (30) is connected to the conductive shell (10) and covers the first open end (103); a negative electrode member (40) is connected to the first mounting surface (104); a positive electrode member (50) is connected to the first mounting surface (104); the positive electrode member (50) comprises a positive pole (501); the positive pole (501) extends into the first mounting hole (1041); and the positive pole (501) is insulated from the conductive shell (10) by means of an insulating assembly. The housing assembly can effectively reduce the thickness of a housing, so that the thickness of the battery can be reduced, thereby better meeting the demand for thin battery products.

Description

Shell assembly and battery

[0001] Priority information: This application claims priority to Chinese patent application No. 202420660603.3 filed on April 2, 2024, and priority to Chinese patent application No. 202422571746.X filed on October 24, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of batteries, and in particular to a housing component and a battery. Background Art

[0003] Lithium-ion batteries have been widely used in recent years due to their safety, stability, and durability. Existing lithium batteries typically consist of a housing and a cover, with the positive and negative electrodes mounted on the housing. This makes the battery housing relatively thick. However, some electronic products require thinner batteries to function properly. For example, foldable phones require ultra-thin batteries, but existing battery structures cannot meet these requirements. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to reduce the thickness of the battery so that the battery can meet the needs of more electronic products.

[0005] In order to solve the above technical problems, the present invention provides a housing assembly, comprising:

[0006] A conductive housing having a receiving cavity, the receiving cavity having a first open end arranged along a first direction, a first mounting surface formed on the conductive housing, the first mounting surface being arranged perpendicular to the first direction, and a first mounting hole communicating with the receiving cavity being arranged on the first mounting surface;

[0007] a first cover plate, the first cover plate being connected to the conductive housing and covering the first open end;

[0008] a negative electrode member connected to the first mounting surface;

[0009] A positive electrode member is connected to the first mounting surface, the positive electrode member includes a positive electrode column, the positive electrode column extends into the first mounting hole, and the positive electrode column is insulated from the conductive shell by an insulating component.

[0010] In one embodiment of the present invention, the insulating assembly includes a first insulating member and a second insulating member, and one end of the positive electrode column facing away from the first cover is insulated from the conductive housing by the first insulating member, and the other end is insulated from the conductive housing by the second insulating member;

[0011] Wherein, the first insulating member and the second insulating member are both connected to the conductive shell, and the second insulating member is located in the accommodating cavity.

[0012] In one embodiment of the present invention, the accommodating cavity is provided with a first open end and a second open end at both ends along the first direction, the second open end is covered by a second cover plate, and the second cover plate is connected to the conductive housing;

[0013] The positive electrode is connected to the first mounting surface and does not contact the second cover plate. One end of the positive electrode column facing away from the first cover plate is insulated from the conductive shell by a first insulating member, and the other end is also insulated from the first cover plate by a second insulating member.

[0014] In one embodiment of the present invention, the first mounting surface is located between the first cover plate and the second cover plate, and the first cover plate and the second cover plate are both parallel to the first mounting surface.

[0015] In one embodiment of the present invention, one end portion of the conductive housing protrudes outward to form a first protruding portion, and the first mounting surface is formed on the first protruding portion.

[0016] In one embodiment of the present invention, the end of the conductive shell forming the first protrusion also has a first notch.

[0017] In one embodiment of the present invention, one end portion of the conductive housing protrudes inward to form a second protruding portion, and the first mounting surface is formed on the second protruding portion.

[0018] In one embodiment of the present invention, the second protrusion has a corner notch in a direction perpendicular to the protruding direction.

[0019] In one embodiment of the present invention, the second protrusion has no corner notch in a direction perpendicular to the protruding direction.

[0020] In one embodiment of the present invention, the first insulating member includes a cylindrical portion, which is at least partially located in the first mounting hole, and the second insulating member includes an upper insulating portion, which is provided with a first through hole, and one end of the positive electrode column extends into the cylindrical portion and passes through the first through hole.

[0021] In one embodiment of the present invention, the positive electrode member further includes a first end plate and a second end plate, the positive electrode column is located between the first end plate and the second end plate, the outer peripheral edges of the first end plate and the second end plate both exceed the outer peripheral edge of the positive electrode column, the upper end of the cylindrical portion of the first insulating member extends toward the periphery to form an insulating plate body, the insulating plate body is located on the upper part of the first mounting surface, and the first end plate is located on the upper part of the insulating plate body.

[0022] In one embodiment of the present invention, the second insulating member includes an upper insulating portion and a lower insulating portion arranged opposite to each other, the upper insulating portion and the lower insulating portion are connected by a transition insulating portion, a first gap is formed between the upper insulating portion and the lower insulating portion, the upper insulating portion is provided with a first through hole, one end of the positive electrode column extends into the cylindrical portion and passes through the first through hole into the first gap.

[0023] In one embodiment of the present invention, a countersunk hole connected to the cylindrical portion is provided on the insulating plate body, the first end plate is located in the countersunk hole, the second end plate is located in the first gap, the upper insulating portion of the second insulating member is located between the first mounting surface and the second end plate, and the lower insulating portion is located between the second end plate and the first cover plate.

[0024] In one embodiment of the present invention, a conductive extension plate is further connected between the upper insulating portion and the second end plate, and the positive electrode column is connected to the conductive extension plate.

[0025] In one embodiment of the present invention, the upper insulating portion includes a protruding portion and a limiting portion protruding toward the first cover plate;

[0026] The thickness of the protrusion is greater than the thickness of the conductive extension plate, and the protrusion is arranged corresponding to the side of the conductive extension plate;

[0027] The conductive extension plate includes a limiting groove, and the limiting portion is arranged in the limiting groove;

[0028] The outer edge of the conductive extension plate does not exceed the outer edge of the upper insulating portion.

[0029] In one embodiment of the present invention, the limiting portion is U-shaped, and the limiting groove is adapted to the outer contour of the limiting portion.

[0030] In one embodiment of the present invention, a liquid injection hole communicating with the accommodating cavity is further provided on the first mounting surface, and the liquid injection hole is blocked by a liquid blocking plug.

[0031] In one embodiment of the present invention, the first mounting surface has a stepped surface, the positive electrode member is located on one side of the stepped surface, and the negative electrode member is located on the other side of the stepped surface.

[0032] In one embodiment of the present invention, the distance between the top surface of the second cover plate and the bottom surface of the first cover plate is 1 to 4 mm.

[0033] In one embodiment of the present invention, the conductive shell is polygonal.

[0034] In one embodiment of the present invention, the conductive housing is arc-shaped, and the first cover is also arc-shaped.

[0035] In one embodiment of the present invention, the conductive shell includes a base plate and an annular side wall connected to the outer edge of the base plate, the base plate includes a first plate body, a second plate body and a third plate body connected between the first plate body and the second plate body, the second plate body is closer to the first opening end than the first plate body; the first mounting surface is formed on the second plate body.

[0036] In one embodiment of the present invention, the conductive housing includes an annular flange connected to the outer end of the annular side wall, and the first cover plate is in contact with the annular flange.

[0037] In one embodiment of the present invention, the first plate and the second plate are in the shape of flat plates and are arranged in parallel;

[0038] The third plate is in the shape of a flat plate, and is arranged perpendicular to or at an obtuse angle to the first plate and the second plate; or

[0039] The third plate body is in the shape of an arc plate.

[0040] In one embodiment of the present invention, the annular side wall includes a first plate portion, a second plate portion, a third plate portion, and a fourth plate portion. The projections of the first plate portion and the second plate portion on the same plane along the thickness direction of the conductive shell are arc-shaped, and the centers of curvature of the first plate portion and the second plate portion are located on the same side of the conductive shell. The two ends of the first plate portion and the two ends of the second plate portion are connected respectively by the third plate portion and the fourth plate portion. The fourth plate portion is connected to the second plate body, and the third plate portion is connected to the first plate body.

[0041] [Corrected 23.12.2024 according to Rule 26] The central angle between the first plate portion and the second plate portion is 5° to 270°.

[0042] In one embodiment of the present invention, the third plate portion is provided with a liquid injection hole communicating with the accommodating cavity, and the liquid injection hole is blocked by a liquid blocking plug.

[0043] The present invention also discloses a battery, comprising a battery cell and a shell assembly as described above, wherein the battery cell is located in the accommodating cavity of the conductive shell, the positive electrode of the battery cell is connected to the positive electrode component, and the negative electrode of the battery cell is connected to the negative electrode component.

[0044] The above technical solution of the present invention has the following advantages over the prior art:

[0045] The housing assembly and battery of the present invention can effectively reduce the thickness of the housing, thereby making the battery thinner and better meeting the needs of thin battery products. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0047] FIG1 is a schematic diagram of a battery structure according to a first embodiment of the present invention;

[0048] FIG2 is a top view of the structure shown in FIG1 ;

[0049] FIG3 is a cross-sectional view of a point EE in FIG2 ;

[0050] FIG4 is a partial enlarged view of point M in FIG3 ;

[0051] FIG5 is a cross-sectional view of FIG3 at FF in FIG2;

[0052] FIG6 is an exploded view of the structure shown in FIG1

[0053] FIG7 is a schematic structural diagram of the battery structure in FIG1 after removing the first cover plate and the second cover plate;

[0054] FIG8 is a schematic diagram of the structure in FIG7 from another angle;

[0055] FIG9 is an exploded view of the structure shown in FIG7

[0056] FIG10 is a schematic structural diagram of the first insulating member of the present invention;

[0057] FIG11 is a schematic structural diagram of the second insulating member of the present invention;

[0058] FIG12 is a schematic diagram of a battery structure according to a second embodiment of the present invention;

[0059] FIG13 is a top view of the structure shown in FIG12;

[0060] FIG14 is a cross-sectional view of a portion GG in FIG13 ;

[0061] FIG15 is an exploded view of the structure shown in FIG12

[0062] FIG16 is a schematic structural diagram of the battery structure in FIG12 after removing the first cover plate and the second cover plate;

[0063] FIG17 is a schematic diagram of the structure in FIG16 from another angle;

[0064] FIG18 is an exploded view of the structure shown in FIG16 ;

[0065] FIG19 is a schematic diagram of a battery structure according to a third embodiment of the present invention;

[0066] FIG20 is a top view of the structure shown in FIG19;

[0067] FIG21 is a cross-sectional view of a portion JJ in FIG20 ;

[0068] FIG22 is an exploded view of the structure shown in FIG19

[0069] FIG23 is a schematic structural diagram of the battery structure in FIG19 after removing the first cover plate and the second cover plate;

[0070] FIG24 is a schematic diagram of the structure in FIG23 from another angle;

[0071] FIG25 is a schematic diagram of a housing assembly according to a fourth embodiment of the present invention.

[0072] FIG. 26 is an exploded view of the housing assembly shown in FIG. 25 .

[0073] FIG. 27 is a perspective view of the housing assembly shown in FIG. 25 with the first cover plate removed.

[0074] FIG28 is a partial enlarged view of point Ⅰ in FIG27.

[0075] FIG. 29 is a top view of the housing assembly shown in FIG. 25 .

[0076] FIG30 is a cross-sectional view taken along section line DD in FIG29.

[0077] FIG31 is a cross-sectional view of a housing assembly according to an embodiment of the present invention. The connection angles of the third plate body with the first plate body and the second plate body in FIG30 and FIG31 are different.

[0078] FIG32 is a cross-sectional view of a housing assembly according to an embodiment of the present invention. FIG32 is different from the shape of the third plate in FIG30 and FIG31 .

[0079] FIG33 is a cross-sectional view of the positive electrode member of the housing assembly shown in FIG25.

[0080] FIG34 is a partial enlarged view of point II in FIG30.

[0081] FIG35 is a schematic diagram of the second insulating member in the housing assembly shown in FIG25.

[0082] FIG36 is an exploded view of a battery according to an embodiment of the present invention.

[0083] FIG37 is an exploded view of a battery according to an embodiment of the present invention. The battery cells shown in FIG36 and FIG37 have different shapes.

[0084] FIG38 is an exploded view of another special-shaped housing assembly of the present invention;

[0085] Description of the accompanying drawings: 10, conductive shell; 101, accommodating cavity; 1011, first cavity; 1012, second cavity; 102, second opening end; 103, first opening end; 104, first mounting surface; 1041, first mounting hole; 1042, injection hole; 1043, stepped surface; 105, first protrusion; 106, first notch; 107, second notch; 108, second protrusion; 1081, angle notch; 109, bottom plate; 1091, first plate; 1092, second plate; 1093, third plate; 110, annular side wall; 1101, first plate; 1102, second plate; 1103, third plate; 1104, fourth plate; 111 , annular flange; 112, receiving space; 113, fillet; 20, second cover plate; 30, first cover plate; 40, negative electrode member; 50, positive electrode member; 501, positive electrode column; 502, first end plate; 503, second end plate; 60, conductive extension plate; 601, second through hole; 602, limiting groove; 70, first insulating member; 701, cylindrical body; 702, insulating plate body; 7021, countersunk hole; 80, second insulating member; 801, upper insulating portion; 8011, first through hole; 8012, convex portion; 8013, limiting portion; 8014, arc surface; 802, lower insulating portion; 803, transition insulating portion; 804, first gap; 90, liquid blocking plug; 100, gasket; 200, battery cell. DETAILED DESCRIPTION

[0086] The present invention will be further described below with reference to the accompanying drawings and specific examples to enable those skilled in the art to better understand and implement the present invention. However, the examples set forth herein are not intended to limit the present invention. It is apparent that the described examples are merely some examples of the present disclosure, and not all examples. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present disclosure, its application, or use.

[0087] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "vertical", "upper", "lower", "top", "side", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0088] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0089] Example 1

[0090] 1 to 11 , the present embodiment discloses a housing assembly comprising a conductive shell 10, a second cover plate 20, a first cover plate 30, a negative electrode member 40, and a positive electrode member 50; in the figure, the X, Y, and Z directions are mutually perpendicular directions, wherein the Z direction is a first direction, which is also a height direction / thickness direction. It can be understood that in the embodiment, “vertical,” “up,” “down,” “top,” and “bottom” are all in the first direction - Z direction, and refer to “up,” “down,” “top,” and “bottom” along the first direction.

[0091] The conductive housing 10 has a receiving cavity 101 for accommodating the battery cell. The receiving cavity 101 is provided with a second open end 102 and a first open end 103 at both ends along the first direction, each of which has an opening. A first mounting surface 104 is formed on the conductive housing 10. The first mounting surface 104 is arranged perpendicular to the first direction and has a first mounting hole 1041 connected to the receiving cavity 101.

[0092] The second cover plate 20 is connected to the conductive housing 10 and covers the second open end 102; the first cover plate 30 is connected to the conductive housing 10 and covers the first open end 103, so that the conductive housing 10 is sealed by the cover plates;

[0093] The negative electrode member 40 is connected to the first mounting surface 104;

[0094] The positive electrode member 50 is connected to the first mounting surface 104 and does not contact the second cover plate 20 so that the positive electrode member 50 and the second cover plate 20 are insulated and isolated;

[0095] The positive electrode member 50 includes a positive electrode column 501, which is insulated from the conductive shell by an insulating component;

[0096] The insulating assembly includes a first insulating member 70 and a second insulating member 80. The positive electrode post 501 extends into the first mounting hole 1041. One end of the positive electrode post 501 facing away from the first cover plate 30 is insulated from the conductive housing 10 by the first insulating member 70, thereby isolating this end from the housing in the area where the first mounting surface 104 is located. The other end is insulated from the first cover plate 30 by the second insulating member 80, thereby further achieving better insulation isolation between the positive electrode post 501 and the conductive housing.

[0097] The first insulating member 70 and the second insulating member 80 are both connected to the conductive housing 10 , and the second insulating member 80 is located in the accommodating cavity 101 .

[0098] Specifically, the first insulating member 70 and the second insulating member 80 are both connected to the housing in the area where the first mounting surface 104 is located.

[0099] The conductive shell is in a polygonal shape, and the first cover plate and the second cover plate are also in polygonal shapes.

[0100] In the conventional prior art, the positive and negative electrode members of the battery casing are directly mounted on the outer peripheral side wall of the casing, which is parallel to the first direction. This structure limits the thickness (i.e., height) of the casing, making the casing thicker. However, the solution of this embodiment changes the casing structure, sets a first mounting surface 104 perpendicular to the first direction, and mounts the positive and negative electrode members on the first mounting surface, thereby effectively reducing the thickness of the casing, making the casing thickness thinner.

[0101] The accommodating cavity is provided with two opening ends, namely a first opening end and a second opening end, or may be provided with only one opening end.

[0102] Compared with a housing cavity having only one open end, for example, only the bottom end is open but the top end is not open, since its shell is generally made by a stamping and stretching process, there will be an arc chamfer between its top surface and the outer peripheral side wall. In order to avoid interference between the arc chamfer and the internal battery cell, the battery cell size can only be made smaller. However, in this embodiment, open ends are set at both ends, so the above-mentioned arc chamfer will not appear, thereby making more effective use of the space of the housing cavity, increasing the battery cell size while avoiding the above-mentioned interference phenomenon, which is conducive to increasing the battery capacity.

[0103] It can be understood that in the above structure, the negative electrode member 40 is directly connected to the conductive shell 10. At this time, the conductive shell 10 and the negative electrode member 40 are used as a negative electrode, while the positive electrode member 50 needs to be insulated and isolated from the conductive shell 10.

[0104] The second cover plate 20 and the first cover plate 30 can both be made of stainless steel plates.

[0105] In some embodiments, the conductive housing 10 is made of an alloy material and is integrally formed to improve production efficiency. Alternatively, the conductive housing 10 can be made of stainless steel, which has excellent corrosion resistance and ductility. Further, the conductive housing 10 can be made of 316L stainless steel. By using an alloy material to make the housing, the housing wall thickness can be made very thin, making the housing more lightweight and providing a larger internal space.

[0106] The negative electrode member 40 may be a nickel sheet, and the positive electrode member 50 may be an aluminum member.

[0107] In some embodiments, the first mounting surface 104 is located between the second cover plate 20 and the first cover plate 30, and both the second cover plate 20 and the first cover plate 30 are parallel to the first mounting surface 104. In other words, the first mounting surface 104 is lower than the second cover plate 20, which is more conducive to improving space utilization and making the housing thinner.

[0108] In this embodiment, one end portion of the conductive housing 10 protrudes outward to form a first protruding portion 105 , and a first mounting surface 104 is formed on the first protruding portion 105 .

[0109] In some embodiments, as shown in FIG. 7 , one end of the conductive housing 10 where the first protrusion 105 is formed further has a first notch 106 to facilitate subsequent assembly and fixation.

[0110] A second notch 107 may also be provided on the end of the conductive housing 10 opposite to the first protrusion 105 as needed.

[0111] In some embodiments, the first insulating member 70 includes a cylindrical portion 701, which is at least partially located in the first mounting hole 1041, as shown in Figures 4 and 11. The second insulating member 80 includes an upper insulating portion 801 and a lower insulating portion 802 arranged opposite to each other. The upper insulating portion 801 and the lower insulating portion 802 are connected by a transition insulating portion 803. A first gap 804 is formed between the upper insulating portion 801 and the lower insulating portion 802. The upper insulating portion 801 is provided with a first through hole 8011; one end of the positive electrode column 501 extends into the cylindrical portion 701 and passes through the first through hole 8011 into the first gap 804.

[0112] The above structure insulates the upper portion of the positive electrode post 501 from the region of the housing where the first mounting surface 104 is located via the cylindrical portion 701 of the first insulating member 70. The upper insulating portion 801 of the second insulating member 80 further ensures insulation in this region. The lower portion of the positive electrode post 501 is insulated from the lower first cover plate 30 via the lower insulating portion 802 of the second insulating member 80. Therefore, the arrangement of the first insulating member 70 and the second insulating member 80 above can more reliably ensure insulation between the positive electrode member 50 and the conductive housing 10 and the first cover plate 30.

[0113] In some embodiments, as shown in FIG4 and FIG9 , the positive electrode member 50 further includes a first end plate 502 and a second end plate 503 , and the positive electrode column 501 is located between the first end plate 502 and the second end plate 503 . The outer peripheral edges of the first end plate 502 and the second end plate 503 both extend beyond the outer peripheral edge of the positive electrode column 501 to facilitate better positioning.

[0114] As shown in Figures 4 and 10, the upper end of the cylindrical portion 701 of the first insulating member 70 extends outward to form an insulating plate body 702. The insulating plate body 702 is provided with a countersunk hole 7021 that communicates with the cylindrical portion 701. The insulating plate body 702 is located above the first mounting surface 104, and the first end plate 502 is located in the countersunk hole 7021 to achieve insulation isolation from the first mounting surface 104.

[0115] The second end plate 503 is located in the first gap 804, the upper insulating portion 801 of the second insulating member 80 is located between the first mounting surface 104 and the second end plate 503 to better achieve insulation isolation between the positive electrode column 501 and the conductive shell 10, and the lower insulating portion 802 is located between the second end plate 503 and the first cover plate 30 to achieve insulation isolation between the second end plate 503 and the first cover plate 30.

[0116] The cylindrical portion 701 and insulating plate 702 of the first insulating member 70 can be integrally formed; the first end plate 502, the second end plate 503, and the positive electrode column 501 of the positive electrode member 50 can also be integrally formed. The positive electrode member 50 can be connected to the second insulating member 80 by riveting.

[0117] Furthermore, a conductive extension plate 60 is connected between the upper insulating portion 801 and the second end plate 503 , and the positive electrode column 501 and the conductive extension plate 60 are connected to better connect the positive electrode member 50 and the positive electrode of the battery cell through the conductive extension plate 60 .

[0118] The conductive extension plate 60 may be made of an aluminum sheet.

[0119] Preferably, a second through hole 601 may be provided on the conductive extension plate 60 , and the positive electrode column 501 passes through the second through hole 601 .

[0120] The first insulating member and the second insulating member are both made of insulating materials, and optionally, made of polymer materials, such as PFA (fluoroplastic) or PP (polypropylene).

[0121] In some embodiments, as shown in FIG9 , the first mounting surface 104 is further provided with a liquid injection hole 1042 communicating with the accommodating cavity 101 to facilitate injection of electrolyte into the accommodating cavity 101. The liquid injection hole 1042 is blocked by a liquid blocking plug 90. The liquid blocking plug 90 can be welded to the first mounting surface 104 via the gasket 100.

[0122] In some embodiments, as shown in FIG7 , the first mounting surface 104 has a stepped surface 1043 , i.e., the first mounting surface 104 has two uneven portions, with the positive electrode member 50 located on one side of the stepped surface 1043 and the negative electrode member 40 located on the other side of the stepped surface 1043 . This facilitates subsequent assembly and positioning of the electrode assembly.

[0123] Furthermore, the negative electrode member 40 and the liquid blocking plug 90 can be disposed on the same side of the stepped surface 1043. For example, as shown in FIG7 , the negative electrode member 40 and the liquid blocking plug 90 can be disposed on the lower side of one side of the stepped surface 1043, and the positive electrode member 50 can be disposed on the higher side of the other side. Alternatively, the opposite arrangement can be used.

[0124] In some embodiments, as shown in FIG. 7 , a liquid blocking plug 90 may be disposed between the positive electrode member 50 and the negative electrode member 40 .

[0125] In some embodiments, a distance H between the top surface of the second cover plate 20 and the bottom surface of the first cover plate 30 is 1 to 4 mm.

[0126] This embodiment also discloses a battery, including a battery cell 200 and a shell assembly described in any of the above schemes, the battery cell 200 is located in the accommodating cavity 101 of the conductive shell 10, the positive electrode of the battery cell is connected to the positive electrode member 50, and the negative electrode of the battery cell is connected to the negative electrode member 40.

[0127] The battery of the above embodiment is thin overall, with a thickness of 1 to 4 mm, which can better meet the demand for thin and light battery products.

[0128] Example 2

[0129] 12-18 , the main difference between this embodiment and the first embodiment is that one end portion of the conductive housing 10 protrudes inward to form a second protrusion 108, and a first mounting surface 104 is formed on the second protrusion 108. The second protrusion 108 has a corner notch in a direction perpendicular to the protruding direction.

[0130] As shown in Figures 12 and 16, the second protrusion 108 is located at the corner of the shell. The protruding direction of the second protrusion 108 is the Y direction, and a corner notch is set in the X direction. That is, in this manner, the second protrusion 108 not only has a notch facing the opposite direction of the Y direction, but also has a corner notch facing the opposite direction of the X direction.

[0131] This embodiment also discloses a battery, including a battery cell 200 and a shell assembly described in any of the above schemes, the battery cell 200 is located in the accommodating cavity 101 of the conductive shell 10, the positive electrode of the battery cell is connected to the positive electrode member 50, and the negative electrode of the battery cell is connected to the negative electrode member 40.

[0132] Example 3

[0133] 19-24 , the main difference between this embodiment and the first embodiment is that one end portion of the conductive housing 10 protrudes inward to form a second protrusion 108, and a first mounting surface 104 is formed on the second protrusion 108. The second protrusion 108 does not have a corner notch in a direction perpendicular to the protrusion direction.

[0134] As shown in Figures 1 and 23, the second protrusion 108 is located near the middle of one end of the shell. The protruding direction of the second protrusion 108 is the Y direction. It has side walls on both sides of the X direction and no corner notches. That is, in this manner, the second protrusion 108 only has a notch facing the opposite direction of the Y direction.

[0135] This embodiment also discloses a battery, including a battery cell 200 and a shell assembly described in any of the above schemes, the battery cell 200 is located in the accommodating cavity 101 of the conductive shell 10, the positive electrode of the battery cell 200 is connected to the positive electrode member 50, and the negative electrode of the battery cell 200 is connected to the negative electrode member 40.

[0136] Example 4

[0137] 25 to 37 , the main difference between this embodiment and the first embodiment is that the conductive housing 10 is arc-shaped, and the first cover plate 30 is also arc-shaped.

[0138] The conductive shell 10 includes a base plate 109 and an annular side wall 110 connected to the outer edge of the base plate 109. The base plate 109 includes a first plate body 1091, a second plate body 1092, and a third plate body 1093 connected between the first plate body 1091 and the second plate body 1092. The second plate body 1092 is closer to the first opening end 103 than the first plate body 1091. The first plate body 1091, the second plate body 1092, and the third plate body 1093 form a step, and the first mounting surface 104 is formed on the second plate body 1092.

[0139] The conductive housing 10 may be provided with only one open end, namely the first open end 103, and the bottom thereof may be provided with a bottom plate 109. The conductive housing 10 and the first cover plate 30 may be fixedly connected by welding or gluing.

[0140] By sequentially connecting the first plate 1091, the second plate 1092, and the third plate 1093 to form a step, a receiving space 112 can be reserved, which also allows the wires connected to the electrode assembly (positive and negative electrode members 40) to be partially located within the receiving space 112, making welding convenient and allowing the two ends of the battery shell to fit closer to external components, making the arrangement of external components more compact, and thus more conducive to the miniaturization of products using the battery shell (such as smart rings).

[0141] In some embodiments, the conductive housing 10 is made of an alloy material and is integrally formed, thereby improving production efficiency.

[0142] In some embodiments, the conductive housing 10 is formed by stamping. The conductive housing 10 can be formed in one step by stamping a sheet of alloy material using a punch that is adapted to the shape of the conductive housing 10 .

[0143] Optionally, the conductive housing 10 includes an annular flange 111 connected to the outer end of the annular sidewall 110, and the first cover plate 30 is in contact with the annular flange 111. The two are connected by, for example, laser welding. The presence of the annular flange 111 helps improve the dimensional accuracy and molding quality of the stamped housing, reduces cracking, and enhances the overall structural strength of the housing. Furthermore, the annular flange 111 protrudes from the annular sidewall 110, facilitating the connection between the first cover plate 30 and the conductive housing 10 and ensuring a reliable and leak-tight connection.

[0144] In some embodiments, the first plate 1091 and the second plate 1092 are arranged in parallel, and both are flat plates. The third plate 1093 can be flat or curved. As a feasible embodiment, as shown in FIG6 , the third plate 1093 is flat and perpendicular to the first plate 1091 and the second plate 1092. As another feasible embodiment, as shown in FIG31 , the third plate 1093 is flat and is arranged at an obtuse angle to the first plate 1091 and the second plate 1092. As yet another feasible embodiment, as shown in FIG32 , the third plate 1093 is curved.

[0145] As shown in FIG32 , the electrode assembly (positive and negative electrodes) is arranged on the second plate 1092 , and the spacing C between the first plate 1091 and the second plate 1092101 is not less than 0.10 mm, which is conducive to better accommodating the wires connected to the electrode assembly.

[0146] As shown in Figures 25, 26, 29 and 30, the annular side wall 110 includes a first plate portion 1101, a second plate portion 1102, a third plate portion 1103 and a fourth plate portion 1104. The projection of the first plate portion 1101 and the second plate portion 1102 along the thickness direction A of the battery shell on the same plane (for example, the plane where the first cover plate 30 or the first plate body 1091 is located) is arc-shaped. It can be understood that the projection plane is perpendicular to the thickness direction A (i.e., the first direction) of the conductive shell. The center of curvature of the first plate portion 1101 and the second plate portion 1102 is located on the same side of the shell 1. The two ends of the first plate portion 1101 and the two ends of the second plate portion 1102 are connected by the third plate portion 1103 and the fourth plate portion 1104 respectively. The fourth plate portion 1104 is connected to the second plate body 1092, and the third plate portion 1103 is connected to the first plate body 1091. The four plate portions form a closed ring.

[0147] In the embodiments shown in Figures 25 and 29, the projections of the first plate portion 1101 and the second plate portion 1102 onto the same plane along the thickness direction A of the battery shell are concentric arcs, and the central angles B are the same. For example, when a battery including such a battery shell is placed in a circular device such as a ring, the contour of the battery shell is adapted to the device, enabling rational use of space and making the device more compact, thereby facilitating miniaturization of the device. It will be understood that in some embodiments, the centers of the arc surfaces 8014 projected onto the same plane by the first plate portion 1101 and the second plate portion 1102 can be in the same position or at different positions, and similarly, the central angles can be the same or different.

[0148] 27 , the housing 1 has a central angle B. Optionally, the central angle B is 5° to 270°.

[0149] In some embodiments, the third plate portion 1103 is provided with an injection hole 1042 that communicates with the accommodating cavity 101, and the injection hole 1042 is blocked by a liquid blocking plug 90. As shown in FIG2 , the fourth plate portion 1104 is connected to the second plate body 1092, and the third plate portion 1103 is connected to the first plate body 1091. The area of ​​the third plate portion 1103 is larger than that of the second plate body 1092. Therefore, it is easier to open a hole in the third plate portion 1103, for example, by laser cutting, drilling, or punching to form the injection hole 1042. In addition, the injection hole 1042 is away from the electrode assembly, thereby reducing the impact of electrolyte leakage on the electrode assembly.

[0150] As shown in Figures 25, 26, 27, 28 and 33, the positive electrode assembly includes a positive electrode column 501 and a conductive extension plate 60 arranged in a conductive shell 10. The insulating assembly includes a first insulating member 7070 and a second insulating member 8080. The upper insulating portion 801 of the second insulating member 80 separates the conductive extension plate 60 and the second plate body 1092. The first insulating member 70 separates the positive electrode column 501 and the second plate body 1092. The positive electrode column 501 passes through the first insulating member 70, the first plate body 1091 and the upper insulating portion 801 to be connected to the conductive extension plate 60.

[0151] As shown in Figure 33, the positive electrode component 50 also includes a first end plate 502 and a second end plate 503. The positive electrode column 501 is located between the first end plate 502 and the second end plate 503. The outer peripheral edges of the first end plate 502 and the second end plate 503 both exceed the outer peripheral edge of the positive electrode column 501. The upper end of the cylindrical portion 701 of the first insulating component 70 extends toward the periphery to form an insulating plate body 702. The insulating plate body 702 is located on the upper part of the first mounting surface 104, and the first end plate 502 is located on the upper part of the insulating plate body 702.

[0152] The first end plate 502 and the second end plate 503 are formed by roughening a columnar component, so that the positive electrode component 50 is connected to the shell by riveting.

[0153] The positive electrode component 50 and the negative electrode component 40 are both disposed on the second plate 1092 , which not only facilitates thinning of the housing but also facilitates wiring, thereby improving assembly efficiency.

[0154] As shown in Figures 28, 30, 34 and 35, the second insulating member 80 has only an upper insulating portion 801, and the upper insulating portion 801 includes a protrusion 8012 protruding toward the first cover plate 30 and a limiting portion 8013; the thickness of the protrusion 8012 is greater than the thickness of the conductive extension plate 60, thereby preventing the conductive extension plate 60 from contacting the first cover plate 30, thereby protecting the safety of battery use.

[0155] Furthermore, the protrusion 8012 is disposed corresponding to the side of the conductive extension plate 60, thereby limiting the position of one side of the conductive extension plate 60 and preventing the conductive extension plate 60 from swinging relative to the upper insulating portion 801 and contacting the housing, thereby causing a short circuit. In one embodiment, as shown in Figures 34 and 35, a protrusion 8012 is disposed on one side of the conductive extension plate 60. In the embodiment shown in Figures 34 and 35, the electrode assembly is disposed on the second plate body 1092, and the protrusion 8012 is located between the fourth plate portion 1104 and the conductive extension plate 60. Even if the conductive extension plate 60 swings relative to the upper insulating portion 801, it will be blocked by the protrusion 8012, thereby preventing the conductive extension plate 60 from contacting the fourth plate portion 1104 and causing a short circuit.

[0156] In another embodiment, protrusions 8012 are symmetrically provided on both sides of the conductive extension plate 60 .

[0157] Optionally, the protrusion 8012 is preferably in the shape of an elongated strip and is disposed corresponding to the long side of the conductive extension plate 60 .

[0158] The conductive extension plate 60 has a second through-hole 601, through which the positive electrode post 501 is inserted and held in place by a first end plate 502 and a second end plate 503 at each end. If the positive electrode post 501 becomes loose, the conductive extension plate 60 will rotate around the positive electrode post 501. During this rotation, the conductive extension plate 60 may contact the housing 1, causing a short circuit and compromising the battery's safety. As shown in Figures 26, 28, and 35, the conductive extension plate 60 includes a retaining groove 602, within which a retaining portion 8013 is positioned, thereby securing the conductive extension plate 60 relative to the second insulating member 80. Because the outer edge of the conductive extension plate 60 does not extend beyond the outer edge of the second insulating member 80, even if the second insulating member 80 becomes loose and rotates, the conductive extension plate 60 will not contact the housing.

[0159] Furthermore, as shown in Figures 26, 28 and 33, the limiting portion 8013 is U-shaped for easy processing. It can be understood that the shape of the limiting portion 8013 can be selected according to actual conditions; the limiting groove 602 is adapted to the outer contour of the limiting portion 8013, thereby improving the stability of the position of the conductive extension plate 60.

[0160] As shown in Figures 30 and 34, a rounded corner 113 is provided between the second plate body 1092 and the third plate body 1093, and the upper insulating portion 801 of the second insulating member 80 is provided with an arc surface 8014 that fits with the rounded corner 113, which can improve the stability of the position of the second insulating member 80 and prevent it from rotating toward the fourth plate portion 1104.

[0161] In the embodiment shown in Figure 25, the electrode assembly is arranged on the second plate 1092, the third plate 1093 is plate-shaped, and the third plate 1093 is arranged perpendicular to the first plate 1091 and the second plate 1092. As shown in Figure 28, the accommodating cavity 101 includes a first cavity 1011 and a second cavity 1012 arranged on both sides of the third plate 1093. The shape of the battery cell 200 is adapted to the first cavity 1011 and is arranged in the first cavity 1011.

[0162] [Corrected 23.12.2024 according to Rule 26] It can be understood that the shape of the battery cell 200 can be adapted to the accommodating cavity 101, as shown in Figures 27, 31 and 37. In this case, the battery cell 200 partially extends into the second cavity 1012, thereby increasing the battery storage capacity.

[0163] In some embodiments, as shown in FIG. 37 , the first cover plate 30 may be in the shape of a flat plate, and the shape of the connecting surface between the conductive housing 10 and the first cover plate 30 is adapted to the shape of the first cover plate 30 .

[0164] In other embodiments, as shown in FIG38 , the first cover plate 30 may be in the shape of a spiral sheet, and the shape of the connecting surface between the conductive shell 10 and the first cover plate 30 is adapted to the shape of the first cover plate 30 to better meet the needs of special-shaped batteries.

[0165] This embodiment also discloses a battery, including a battery cell 200 and a shell assembly described in any of the above schemes, the battery cell 200 is located in the accommodating cavity 101 of the conductive shell 10, the positive electrode of the battery cell 200 is connected to the positive electrode member 50, and the negative electrode of the battery cell 200 is connected to the negative electrode member 40.

[0166] It can be understood that the insulating component form in Example 4 can also be applied to any of Examples 1 to 3. Similarly, the insulating component form in Examples 1 to 3 can also be applied to Example 4. It can be selected according to actual needs.

[0167] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present invention, that is, any multiple embodiments can be combined to meet the needs of different application scenarios. They are all within the scope of protection of this application and will not be described in detail here.

[0168] It should be noted that the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A housing assembly, characterized in that: include, A conductive housing having a receiving cavity, the receiving cavity having a first open end arranged along a first direction, a first mounting surface formed on the conductive housing, the first mounting surface being arranged perpendicular to the first direction, and a first mounting hole communicating with the receiving cavity being arranged on the first mounting surface; a first cover plate, the first cover plate being connected to the conductive housing and covering the first open end; a negative electrode member connected to the first mounting surface; A positive electrode member is connected to the first mounting surface, the positive electrode member includes a positive electrode column, the positive electrode column extends into the first mounting hole, and the positive electrode column is insulated from the conductive shell by an insulating component.

2. The housing assembly according to claim 1, wherein: The insulating assembly includes a first insulating member and a second insulating member, wherein one end of the positive electrode column facing away from the first cover is insulated from the conductive shell by the first insulating member, and the other end of the positive electrode column is insulated from the conductive shell by the second insulating member; Wherein, the first insulating member and the second insulating member are both connected to the conductive shell, and the second insulating member is located in the accommodating cavity.

3. The housing assembly according to claim 2, wherein: The accommodating cavity is provided with a first open end and a second open end at both ends along the first direction, the second open end is covered by a second cover plate, and the second cover plate is connected to the conductive housing; The positive electrode is connected to the first mounting surface and does not contact the second cover plate. One end of the positive electrode column facing away from the first cover plate is insulated from the conductive shell by a first insulating member, and the other end is also insulated from the first cover plate by a second insulating member.

4. The housing assembly according to claim 3, wherein: The first mounting surface is located between the first cover plate and the second cover plate, and the first cover plate and the second cover plate are both parallel to the first mounting surface.

5. The housing assembly according to claim 2, wherein: One end portion of the conductive shell protrudes outward to form a first protruding portion, and the first mounting surface is formed on the first protruding portion.

6. The housing assembly according to claim 5, wherein: One end of the conductive shell forming the first protrusion also has a first notch.

7. The housing assembly according to claim 6, wherein: One end portion of the conductive shell protrudes inward to form a second protruding portion, and the first mounting surface is formed on the second protruding portion.

8. The housing assembly according to claim 7, wherein: The second protrusion has a corner notch in a direction perpendicular to the protruding direction.

9. The housing assembly according to claim 7, wherein: The second protrusion has no corner notch in a direction perpendicular to the protruding direction.

10. The housing assembly according to claim 2, wherein: The first insulating member includes a cylindrical portion, which is at least partially located in the first mounting hole. The second insulating member includes an upper insulating portion, which is provided with a first through hole. One end of the positive electrode column extends into the cylindrical portion and passes through the first through hole.

11. The housing assembly according to claim 10, wherein: The positive electrode component also includes a first end plate and a second end plate, the positive electrode column is located between the first end plate and the second end plate, the outer peripheral edges of the first end plate and the second end plate both exceed the outer peripheral edge of the positive electrode column, the upper end of the cylindrical portion of the first insulating component extends toward the periphery to form an insulating plate body, the insulating plate body is located on the upper part of the first mounting surface, and the first end plate is located on the upper part of the insulating plate body.

12. The housing assembly according to claim 11, wherein: The second insulating member includes an upper insulating portion and a lower insulating portion arranged opposite to each other, the upper insulating portion and the lower insulating portion are connected by a transition insulating portion, a first gap is formed between the upper insulating portion and the lower insulating portion, the upper insulating portion is provided with a first through hole, one end of the positive electrode column extends into the cylindrical portion and passes through the first through hole into the first gap.

13. The housing assembly according to claim 12, wherein: The insulating plate body is provided with a countersunk hole connected to the cylindrical portion, the first end plate is located in the countersunk hole, the second end plate is located in the first gap, the upper insulating portion of the second insulating member is located between the first mounting surface and the second end plate, and the lower insulating portion is located between the second end plate and the first cover plate.

14. The housing assembly according to claim 11, wherein: A conductive extension plate is further connected between the upper insulating portion and the second end plate, and the positive electrode column is connected to the conductive extension plate.

15. The housing assembly according to claim 14, wherein: The upper insulating portion includes a protruding portion protruding toward the first cover plate and a limiting portion; The convex portion has a thickness greater than that of the conductive extension plate and is disposed corresponding to a side edge of the conductive extension plate; The conductive extension plate includes a limiting groove, and the limiting portion is arranged in the limiting groove; The outer edge of the conductive extension plate does not exceed the outer edge of the upper insulating portion.

16. The housing assembly according to claim 15, wherein: The limiting portion is U-shaped, and the limiting groove is adapted to the outer contour of the limiting portion.

17. The housing assembly according to claim 1, wherein: The first mounting surface is further provided with a liquid injection hole communicating with the accommodating cavity, and the liquid injection hole is blocked by a liquid blocking plug.

18. The housing assembly according to claim 1, wherein: The first mounting surface has a stepped surface, the positive electrode member is located on one side of the stepped surface, and the negative electrode member is located on the other side of the stepped surface.

19. The housing assembly according to claim 2, wherein: The distance between the top surface of the second cover plate and the bottom surface of the first cover plate is 1 to 4 mm.

20. The housing assembly according to claim 1, wherein: The conductive shell is polygonal.

21. The housing assembly according to claim 1, wherein: The conductive housing is arc-shaped, and the first cover is also arc-shaped.

22. The housing assembly according to claim 21, wherein: The conductive shell includes a base plate and an annular side wall connected to the outer edge of the base plate. The base plate includes a first plate body, a second plate body and a third plate body connected between the first plate body and the second plate body. The second plate body is closer to the first opening end than the first plate body; the first mounting surface is formed on the second plate body.

23. The housing assembly according to claim 22, wherein: The conductive shell includes an annular flange connected to the outer end of the annular side wall, and the first cover plate is in contact with the annular flange.

24. The housing assembly according to claim 22, wherein: The first plate and the second plate are in the shape of flat plates and are arranged in parallel; The third plate is in the shape of a flat plate, and is arranged perpendicular to or at an obtuse angle to the first plate and the second plate; or The third plate body is in the shape of an arc plate.

25. [Corrected 23.12.2024 according to Rule 26] The housing assembly according to claim 22, characterized in that: The annular side wall includes a first plate portion, a second plate portion, a third plate portion, and a fourth plate portion. The projections of the first plate portion and the second plate portion on the same plane along the thickness direction of the conductive shell are arc-shaped, and the centers of curvature of the first plate portion and the second plate portion are located on the same side of the conductive shell. The two ends of the first plate portion and the two ends of the second plate portion are connected respectively by the third plate portion and the fourth plate portion. The fourth plate portion is connected to the second plate body, and the third plate portion is connected to the first plate body. A central angle between the first plate portion and the second plate portion is 5° to 270°.

26. The housing assembly according to claim 25, wherein: The third plate portion is provided with a liquid injection hole communicated with the accommodating cavity, and the liquid injection hole is blocked by a liquid blocking plug.

27. A battery, characterized in that: It comprises a battery cell and a shell assembly according to any one of claims 1 to 26, wherein the battery cell is located in the accommodating cavity of the conductive shell, the positive electrode of the battery cell is connected to the positive electrode member, and the negative electrode of the battery cell is connected to the negative electrode member.

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