Battery monomer, battery device and electric device

Abstract

The utility model discloses a battery monomer, a battery device and a power utilization device, the battery monomer comprises a shell, a pole and a sealing element, the shell comprises a first wall body; the pole comprises a pole body and a clamping structure, the clamping structure is connected with the first wall body and comprises a first clamping piece and a second clamping piece which are connected, and the first clamping piece and the second clamping piece clamp the pole body in the thickness direction of the first wall body; the sealing piece is clamped between the first clamping piece and the pole body; the first clamping piece is bent towards the second clamping piece at least at the position where the sealing piece is clamped. According to the technical scheme, the problem of loosening or insufficient compression amount of the sealing element can be improved, and the sealing reliability of the single battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power utilization device. BACKGROUND

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable important role. Among them, the power battery includes a plurality of battery monomers, however, the sealing reliability of the battery monomer needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a battery monomer, a battery device and a power utilization device, which are beneficial to improve the sealing reliability of the battery monomer.

[0004] In a first aspect, the embodiments of the present application provide a battery monomer, which comprises a shell, a pole and a sealing element, the shell comprises a first wall body; the pole comprises a pole body and a clamping structure, the clamping structure is connected with the first wall body and comprises a first clamping element and a second clamping element which are connected and arranged, the first clamping element and the second clamping element clamp the pole body along the thickness direction of the first wall body; the sealing element is clamped between the first clamping element and the pole body; the first clamping element is bent towards the second clamping element at least at the position for clamping the sealing element.

[0005] In the above technical solution, by pre-bending at least the part of the first clamping element for clamping the sealing element, the first clamping element is deformed in the direction of pressing the sealing element, so that the first clamping element can resist the rebound force released by the sealing element through the deformation, so that the first clamping element can still maintain the bent shape for pressing the sealing element in the product form, so that the first clamping element can provide sufficient clamping force, so that the sealing element has sufficient compression, thereby improving the problem of loosening or insufficient compression of the sealing element and improving the sealing reliability of the battery monomer.

[0006] In some embodiments, the first clamping element and the second clamping element are connected and arranged by welding.

[0007] In the above technical solution, since the first clamping element has a deformation in the direction of pressing, after the clamps are removed after welding the first clamping element and the second clamping element, the deformation of the first clamping element can simply and effectively overcome the rebound force of the first clamping element, thereby improving the problem of loosening or insufficient compression of the sealing element. Moreover, the welding scheme is easy to operate and implement, reduces the processing difficulty, and can effectively protect the pole body and improve the sealing reliability of the battery monomer.

[0008] In some embodiments, an insulating element is arranged between the second clamping element and the pole body, and the second clamping element and the pole body are integrally connected by injection molding through the insulating element.

[0009] In the above technical solution, for the solution that is more likely to cause the first clamping piece to be loosened and deformed, by setting the first clamping piece to have a reverse deformation amount bent towards the compression direction, the problem of the first clamping piece being loosened and deformed by the rebounding and pushing of the sealing piece can be more directly and effectively improved from the root, thereby improving the problem of the sealing piece being loosened or the compression amount being insufficient. In the above technical solution, since the second clamping piece and the pole body are integrally connected by the insulating piece injection molding, the reliability of the second clamping piece clamping the pole body and the reliability of the insulating piece insulating the second clamping piece from the pole body can be improved. In addition, when the first clamping piece and the second clamping piece are simultaneously arranged in a welded connection, the second clamping piece, the pole body and the insulating piece can be first connected into an inseparable integrated assembly, and then the first clamping piece, the sealing piece and the integrated assembly are assembled, and then the welding of the first clamping piece and the second clamping piece is performed. After welding, the relative positions of the parts in the obtained component are stable, the assembly efficiency is high, and the yield is high.

[0010] In some embodiments, the first clamping piece includes a bent portion participating in clamping the sealing piece. In the thickness direction of the first wall body, the side surface of the bent portion away from the sealing piece is a first surface, and the side surface of the bent portion towards the sealing piece is a second surface. At least one of the first surface and the second surface extends towards the direction close to the second clamping piece along the direction from the first wall body to the pole body.

[0011] In the above technical solution, when the first surface and / or the second surface are configured to extend towards the direction close to the second clamping piece along the direction from the first wall body to the pole body, it indicates that after the battery monomer is processed, the first surface and / or the second surface still maintain the state of extending towards the direction close to the second clamping piece along the direction from the first wall body to the pole body under the rebounding force of the sealing piece on the bent portion, thereby indicating that the bent portion effectively overcomes the rebounding force of the sealing piece, maintains the compression state of the sealing piece, and guarantees the sealing effect. Moreover, if the first surface and the second surface are both configured to extend towards the direction close to the second clamping piece along the direction from the first wall body to the pole body, the bent portion can be processed in an equal wall thickness or close to equal wall thickness form, thereby facilitating the processing of the first clamping piece, and the clamping effect of the bent portion is reliable, which is beneficial to guarantee the compression amount of the sealing piece.

[0012] In some embodiments, the first surface is entirely configured as an inclined surface inclined and extending towards the direction close to the second clamping piece along the direction from the first wall body to the pole body.

[0013] In the technical scheme, the first surface is configured as a slope extending in a direction close to the second clamping member along a direction from the first wall body to the pole body, so that the shape of the first surface is simple, and the bending part is easy to process.

[0014] In some embodiments, the second surface is configured as a slope extending in a direction close to the second clamping member along a direction from the first wall body to the pole body.

[0015] In the technical scheme, the first surface and the second surface are both configured as slopes extending in a direction close to the second clamping member along a direction from the first wall body to the pole body, so that the first clamping member is easy to process, and the bending part can be processed as an equal wall thickness or a nearly equal wall thickness according to needs, so that the first clamping member is easy to process, and the clamping effect of the bending part is reliable, which helps to ensure the compression amount of the sealing member.

[0016] In some embodiments, the bending part includes a plurality of sub-bending parts arranged in sequence along a direction from the first wall body to the pole body, and in adjacent two sub-bending parts, one close to the pole body is bent in a direction close to the second clamping member relative to one close to the first wall body.

[0017] In the technical scheme, the bending part is configured as multiple segments, and the bending direction is increasingly directed to the second clamping member, so that the structural strength of the bending part is more reliable, the rebound force of the sealing member can be more effectively resisted, the sealing member can be more reliably clamped, and the sealing effect is improved.

[0018] In some embodiments, at least two sub-bending parts are involved in clamping the sealing member.

[0019] In the technical scheme, the stress of the bending part can be dispersed, the bending part can more reliably clamp the sealing member, and the sealing effect is improved. Moreover, this way is also helpful to shorten the length of the sub-bending part, increase the number of the sub-bending part, and further improve the structural strength of the bending part.

[0020] In some embodiments, the second surface includes a slope part and a step part arranged in sequence along a direction from the first wall body to the pole body, the slope part extends in a direction close to the second clamping member along a direction from the first wall body to the pole body, the step part protrudes in a direction close to the second clamping member relative to the slope part, and is formed as a plane perpendicular to the thickness direction of the first wall body, and at least part of the sealing member is clamped between the step part and the pole body.

[0021] In the technical solution, the step part is arranged to clamp the sealing element, compared with the scheme of clamping the sealing element by using the inclined surface, the stress uniformity of the sealing element can be improved, the compression uniformity of the sealing element can be improved, and the sealing effect can be improved, and the sealing element is clamped by the flat surface, so that the sealing element will not be applied with the component force along the radial direction of the pole body, so that the stability of the clamped sealing element can be improved, the sealing element can be stably stayed at the clamped position, and the sealing effect can be more reliably played.

[0022] In some embodiments, the sealing element is located on the side of the inclined part close to the pole body.

[0023] In the technical solution, the sealing element is arranged at a position deviated from the inclined part and is not clamped by the inclined part, so that the stability and reliability of the clamped sealing element can be further improved.

[0024] In some embodiments, the bending part extends from the connection position of the second clamping part and the first clamping part to the direction of the pole body, and a part of the bending part is located on the side of the sealing element away from the pole body.

[0025] In the technical solution, the end of the bending part away from the pole body extends to the connection position of the second clamping part and the first clamping part and exceeds the range covered by the sealing element, so that the overall range of the bending part is large, the processing is facilitated, the clamping demand of sealing elements of various sizes can be met, and the application range is wide.

[0026] In some embodiments, the second clamping part comprises a clamping part and a lap part arranged in sequence along the direction from the first wall body to the pole body, the lap part is lapped on the bending part, and the edge of the pole body is clamped between the clamping part and the bending part.

[0027] In the technical solution, the first clamping part and the second clamping part can be lapped and matched, so that the stability and reliability of the matching can be improved, the pole body and the sealing element can be more reliably clamped, and the sealing property can be improved.

[0028] In some embodiments, the first clamping part comprises an extension part, the bending part is connected to the side of the extension part close to the pole body and is bent relative to the extension part to the direction of the second clamping part, the second clamping part and the first clamping part are connected at the end of the extension part away from the bending part, and at least part of the extension part is located on the side of the sealing element away from the pole body.

[0029] In the technical solution, the first clamping part can be bent according to the demand, the connection position of the extension part and the bending part is bent, so that the structural strength at the position can be improved, the bending part can more reliably clamp the sealing element, and the sealing effect can be improved.

[0030] In some embodiments, the second clamping piece comprises, in sequence along a direction from the first wall body to the pole body, a clamping portion and a clamping portion, the clamping portion is parallel to and overlaps the extension portion, and the edge of the pole body is clamped between the clamping portion and the bent portion.

[0031] In the above technical solution, by setting the part of the first clamping piece for cooperating with the second clamping piece to also include an extension portion, the extension portion does not need to extend in the direction close to the second clamping piece as the bent portion does for clamping the sealing piece, so that the extension portion can remain parallel to the overlapping portion, thereby improving the stability of the overlapping of the second clamping piece and the first clamping piece, thereby facilitating the connection reliability of the first clamping piece and the second clamping piece, so that the pole body and the sealing piece can be clamped more reliably, and the sealing performance is improved.

[0032] In some embodiments, the clamping portion is bent in a direction away from the first clamping piece relative to the overlapping portion to form a clamping groove between the clamping portion and the bent portion, and the edge of the pole body extends into the clamping groove and is clamped between the clamping portion and the bent portion.

[0033] In the above technical solution, by setting the second clamping piece to have the above bent shape, the structure of the first clamping piece can be simplified, so that the first clamping piece and the second clamping piece can stably and reliably clamp the pole body together.

[0034] In some embodiments, the first clamping piece comprises, in sequence along a direction from the first wall body to the pole body, a connecting segment and a cantilever segment, the connecting segment is connected to the first wall body, and the cantilever segment is recessed to form a sink in a direction away from the second clamping piece relative to the connecting segment, and the overlapping portion is embedded in the sink to overlap the cantilever segment.

[0035] In the above technical solution, by setting the sink, the pre-positioning effect can be achieved, the assembly efficiency is improved, and when the first clamping piece and the second clamping piece are connected, the cooperation stability of the first clamping piece and the second clamping piece can be improved, which facilitates reliable connection of the two, so that the pole body and the sealing piece can be clamped more reliably, and the sealing performance is improved.

[0036] In some embodiments, the end of the overlapping portion away from the clamping portion is welded to the connecting segment.

[0037] In the above technical solution, the cantilever segment is recessed to form a sink in a direction away from the second clamping piece relative to the connecting segment, and the overlapping portion is embedded in the sink to overlap the cantilever segment, so the connecting segment can naturally be opposite to the overlapping portion, which facilitates the welding connection of the two, is convenient to operate and has reliable connection.

[0038] In some embodiments, in the direction from the first wall body to the pole body, the length of the extension portion is L2, the length of the overlapping portion is L0, and L2≥L0.

[0039] In the technical solution, the cooperation stability of the first clamping member and the second clamping member is improved.

[0040] In some embodiments, L2≥L0≥1.72 mm.

[0041] In the technical solution, the cooperation stability of the first clamping member and the second clamping member is improved, the reliable connection of the two is facilitated, the pole body and the sealing member can be clamped more reliably, and the sealing performance is improved.

[0042] In some embodiments, in the direction from the first wall body to the pole body, the length of the second surface of the bending part is L3, and the length of the part of the sealing member clamped by the first clamping member is W0, and L3≥W0.

[0043] In the technical solution, the bending part can provide a sufficient compression amount of the sealing member.

[0044] In some embodiments, L3≥W0≥1.1 mm.

[0045] In the technical solution, the bending part can provide a sufficient compression amount of the sealing member.

[0046] In some embodiments, the first clamping member comprises a cantilever section oppositely arranged with the second clamping member along the thickness direction of the first wall body, the cantilever section is staggered with the first wall body, the cantilever section comprises a bending part, and the wall thickness of the root end of the cantilever section away from the pole body is greater than the wall thickness of the tip end of the cantilever section close to the pole body.

[0047] In the technical solution, the root strength of the cantilever section can be improved, the support effect of the first clamping member on the second clamping member is improved, and the installation reliability and working stability of the pole body are improved.

[0048] In some embodiments, the wall thickness of the cantilever section gradually decreases along the direction from the first wall body to the pole body.

[0049] In the technical solution, the wall thickness of the cantilever section is gradually changed, so that the structure of the cantilever section is simple, the stability is good, and the processing is facilitated.

[0050] In some embodiments, in the thickness direction of the first wall body, the side surface of the cantilever section away from the second clamping member is a third surface, and the third surface is integrally configured as an inclined surface inclined and extended in the direction from the first wall body to the direction close to the second clamping member.

[0051] In the technical solution, the structure of the cantilever section can be further simplified, the processing of the cantilever section is facilitated, and the bending section is formed.

[0052] In some embodiments, the first clamping member comprises a cantilever segment arranged opposite to the second clamping member along the thickness direction of the first wall body, the cantilever segment is staggered from the first wall body, the cantilever segment comprises a bending part, the length L1 of the cantilever segment in the perpendicular direction of the thickness direction of the first wall body is 4mm-20mm in the direction from the first wall body to the pole body, and the included angle θ between the second surface and the reference plane perpendicular to the thickness direction of the first wall body is 1.5°-10°.

[0053] In the above technical solution, the bending part can provide sufficient compression amount for the sealing member.

[0054] In some embodiments, the wall thickness of the cantilever segment gradually decreases along the direction from the first wall body to the pole body, the side surface of the cantilever segment away from the second clamping member is a third surface, the third surface is configured as an inclined surface extending towards the second clamping member in the direction from the first wall body to the pole body, and the included angle β between the third surface and the reference plane perpendicular to the thickness direction of the first wall body is 20°-40°.

[0055] In the above technical solution, the root of the cantilever segment can have sufficient reinforcing thickness, and the bending part can provide sufficient compression amount for the sealing member.

[0056] In some embodiments, the housing is provided with an electrode assembly, the electrode assembly is electrically connected to the pole body through a conductive part, and the first clamping member is arranged on the side of the second clamping member close to the electrode assembly.

[0057] In the above technical solution, since the first clamping member is arranged on the side of the second clamping member close to the electrode assembly, and the sealing member is clamped between the first clamping member and the pole body, the sealing member can more effectively avoid the electrolyte in the housing from entering the fitting gap between the clamping structure and the pole body, thereby more effectively improving the leakage problem and improving the corrosion problem caused by the electrolyte to the fitting gap, and improving the installation reliability and working stability of the pole body.

[0058] In some embodiments, the first clamping member and the first wall body are separate parts and are assembled.

[0059] In the above technical solution, the overall assembly of the battery monomer is facilitated, for example, the clamping structure, the pole body and the sealing member can be assembled into a pole part, and then the pole part is assembled to the first wall body. Since the pressure during assembly of the sealing member meets the requirement in the process of assembling the pole part, when the pole part is installed to the first wall body, it is not necessary to apply a large pressure to the first wall body to ensure sealing, thereby protecting the first wall body.

[0060] In some embodiments, the first clamping member and the first wall body are integrally formed.

[0061] In the technical solution, the sealing property of the connection between the first clamping member and the first wall body can be improved.

[0062] In some embodiments, the first clamping member is provided with a protruding portion at the end close to the pole body, the protruding portion protrudes towards the second clamping member, the sealing member is provided with a groove at the position corresponding to the protruding portion, the groove is open towards the electrode assembly, and the protruding portion is embedded in the groove.

[0063] In the technical solution, the installation stability of the sealing member can be improved through the embedding cooperation between the protruding portion and the groove, so that the sealing member can reliably seal.

[0064] In some embodiments, the pole body includes a central portion and an edge portion, the edge portion is arranged around the central portion, the central portion includes an inner protruding portion protruding towards the electrode assembly relative to the edge portion, and an outer protruding portion protruding away from the electrode assembly relative to the edge portion; the sealing member includes a sealing portion and a separation portion, the sealing portion is clamped between the first clamping member and the edge portion, and the separation portion is arranged on the side of the first clamping member away from the first wall body and is isolated between the inner protruding portion and the first clamping member.

[0065] In the technical solution, the distance between the pole body and the electrode assembly can be shortened through the arrangement of the inner protruding portion, so that the connection between the pole body and the electrode assembly can be simplified, the separation portion can play an insulating role, the short-circuit connection between the first clamping member and the pole body can be simply and effectively avoided, other insulating parts can be omitted, the structure and assembly can be simplified, and the reliability of the battery monomer can be improved.

[0066] In some embodiments, the housing is arranged with an electrode assembly, the electrode assembly is electrically connected to the pole body through a conductive portion, the pole is arranged with a receiving groove recessed away from the electrode assembly, and at least part of the conductive portion is received in the receiving groove and connected to the pole body.

[0067] In the technical solution, the space occupation of the conductive portion in the housing can be reduced through the arrangement of the receiving groove, and the energy density of the battery monomer can be improved.

[0068] In some embodiments, the battery monomer further includes a pressure relief device, the pressure relief device is arranged in the housing and located on the same side or different side of the pole.

[0069] In the technical solution, when the pressure in the housing exceeds a preset value, the pressure relief device can be used for directional pressure relief, so that the reliability of the battery monomer can be improved.

[0070] In a second aspect, the embodiments of the present application further provide a battery device including the battery monomer of any one of the above-mentioned solutions.

[0071] In the above technical solution, the reliability of the battery cell according to the embodiment of this application is improved, which is beneficial to improving the performance of the battery device.

[0072] In some embodiments, the battery device includes a housing, multiple battery cells housed within the housing, a bottom plate at the bottom of the housing, and terminal posts located on either the side of the housing near the bottom plate or the side of the housing away from the bottom plate.

[0073] In the above technical solution, the relative position of the terminal post component and the bottom plate of the casing is not limited, allowing for flexible arrangement of the battery cell and casing orientation. Specifically, when the terminal post component of the battery cell is located on the side of the casing facing the bottom plate, the battery cell is inverted, and the depressurized products are ejected in the direction away from the passenger compartment, which is safer. When the terminal post component of the battery cell is located on the side of the casing away from the bottom plate, the battery cell is upright, and electrolyte leakage is less likely.

[0074] Thirdly, embodiments of this application also provide an electrical device, including a battery device according to any of the above-described solutions.

[0075] In the above technical solution, the improved performance of the battery device is beneficial to improving the power consumption performance of the electrical device. Attached Figure Description

[0076] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0077] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0078] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0079] Figure 3 This is a schematic diagram of the structure of a battery cell provided in some embodiments of this application;

[0080] Figure 4 Partial cross-sectional view of a battery cell provided in some embodiments of this application;

[0081] Figure 5 Partial cross-sectional view of a battery cell provided in some embodiments of this application;

[0082] Figure 6 for Figure 5Enlarged view of a portion of A shown in FIG. 1;

[0083] Figure 7 Partial cross-sectional view of a first clamp member according to an embodiment of the present application;

[0084] Figure 8 Partial cross-sectional view of a first clamp member according to an embodiment of the present application;

[0085] Figure 9 Partial cross-sectional view of a first clamp member according to an embodiment of the present application;

[0086] Figure 10 Partial cross-sectional view of a first clamp member according to an embodiment of the present application;

[0087] Figure 11 Partial cross-sectional view of a battery cell according to an embodiment of the present application;

[0088] Figure 12 Partial cross-sectional view of a first clamp member according to an embodiment of the present application;

[0089] Figure 13 Partial cross-sectional view of a battery cell according to some embodiments of the present application;

[0090] Figure 14 Process diagram of a battery cell according to some embodiments of the present application;

[0091] Figure 15 Process diagram of a battery cell according to some other embodiments of the present application;

[0092] Figures 16-19 Four state diagrams of an assembly process of a pole member according to some embodiments of the present application;

[0093] Figures 20-22 Three state diagrams of an assembly process of a battery cell according to some embodiments of the present application.

[0094] Reference Signs:

[0095] Vehicle 1000;

[0096] Battery device 100; controller 200; motor 300;

[0097] Case 101; first case portion 1011; second case portion 1012;

[0098] Battery cell 102; first direction F1; second direction F2; third direction F3;

[0099] Housing 1; first wall 111; mounting hole 1111; second wall 112;

[0100] pole 2; pole member 20;

[0101] pole body 21; center portion 211; inner protruding portion 2111; edge portion 212;

[0102] clamping structure 22;

[0103] first clamping piece 221;

[0104] connecting section 221a; cantilever section 221b; sink groove 221c;

[0105] bent portion 2211; sub-bent portion 22111;

[0106] first surface S1; second surface S2; inclined portion S21; step portion S22;

[0107] extension portion 2212; protruding portion 2214;

[0108] second clamping piece 222; lapping portion 2221; clamping portion 2222;

[0109] clamping groove 223;

[0110] insulation sealing structure 23;

[0111] sealing piece 231; sealing portion 2311; partition portion 2312; groove 2313;

[0112] insulation piece 232; inner insulation piece 2321; outer insulation piece 2322;

[0113] electrode assembly 3; active material coating portion 32; tab portion 33;

[0114] conductive portion 4; pressure relief device 5; accommodating groove 6. DETAILED DESCRIPTION

[0115] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0116] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The terms "include" and "have" and their derivatives as used in the specification of the present application herein are meant to be equivalent to "comprise" and "comprising", respectively. The terms "first", "second", and the like used in the specification of the present application herein are used to distinguish between similar objects, and are not meant to be limiting of the present application.

[0117] Reference to "an embodiment" or "the embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" or "in the embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0118] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood in a broad sense, for example, can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0119] The term "and / or" in the present application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in an "or" relationship.

[0120] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0121] "Multiple" appearing in the present application means two or more, including two.

[0122] In the present application, the battery cell can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or a solid-state battery, etc. The present application embodiments are not limited thereto. The battery cell can be in the shape of a cylinder, a cuboid, or other shapes, etc. The present application embodiments are also not limited thereto.

[0123] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery monomers to provide higher voltage and capacity. For example, the battery device can include a box for packaging one or more battery monomers or one or more battery modules, and the box can prevent liquid or other foreign matters from affecting the charging or discharging of the battery monomers.

[0124] The battery monomer includes a shell, an electrode assembly, and an electrolyte (in a solid-state battery, it can be a solid-state electrolyte layer located between the positive and negative electrode sheets), the electrode assembly includes at least one electrode assembly, the electrode assembly and the electrolyte are both accommodated in the shell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator film (which can be omitted in a solid-state battery). The battery monomer mainly works by moving metal ions between the positive and negative electrode sheets.

[0125] The positive electrode sheet includes a positive current collector and a positive active material layer, the positive active material layer is coated on the surface of the positive current collector, the positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer, and the positive current collector without the positive active material layer serves as a positive tab sheet. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc.

[0126] The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer is coated on the surface of the negative current collector, the negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer, and the negative current collector without the negative active material layer serves as a negative tab sheet. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc.

[0127] The material of the separator film can be PP, polypropylene, or PE, polyethylene, etc. The electrode assembly mentioned in the embodiments of the present application is a winding or stacking type structure.

[0128] The material of the shell includes but is not limited to an aluminum shell, a steel shell, an aluminum plastic film, plastic, or other electrolyte corrosion-resistant materials, etc.

[0129] In the related art, the battery monomer is provided with a pole body on the shell, the pole body is electrically connected with the electrode assembly accommodated in the shell on one hand, and the pole body is electrically connected with the busbar component outside the shell on the other hand, so that the busbar component can realize the connection of multiple battery monomers in the battery device, and the busbar component meets the electrical connection requirements between multiple battery monomers.

[0130] In order to fix the pole body, a clamping structure for clamping the pole body can be arranged on the shell. The clamping structure is annular to surround the pole body and clamp the edge of the pole body. The annular clamping structure can expose part of the inner surface of the pole body to meet the requirement of electrical connection between the pole body and the electrode assembly, and can expose part of the outer surface of the pole body to meet the requirement of electrical connection between the pole body and the busbar outside the shell.

[0131] In order to seal the battery cell at the pole body, a sealing ring is arranged between the pole body and the clamping structure. The sealing ring clamped between the pole body and the clamping structure is compressed to achieve sealing effect. During the processing of the battery cell, after the clamping process of the clamping structure on the pole body is completed, the sealing ring will rebound to a certain extent, pushing the clamping structure to deform towards the loosening direction, causing the sealing ring to loosen or insufficient compression, affecting the sealing reliability of the battery cell.

[0132] For example, when the clamping structure includes two parts connected by welding process, the assembly of the clamping structure, the pole body and the sealing ring can be performed first, then the two parts of the clamping structure are clamped by a clamp to make the clamping structure and the pole body clamp the sealing ring together, so that the sealing ring is in a compressed sealing state, then the two parts of the clamping structure are welded together, and the clamp is removed after welding. However, when the clamp is loosened, the sealing ring will rebound to a certain extent, pushing the clamping structure to deform towards the loosening direction, causing the sealing ring to loosen or insufficient compression, affecting the sealing reliability of the battery cell.

[0133] More specifically, when the clamping structure includes a first clamping piece and a second clamping piece, the second clamping piece is connected to the pole body by overmolding to form an integrated assembly, then the sealing ring and the first clamping piece are assembled to the integrated assembly, and a clamp is used to clamp the first clamping piece to clamp the sealing ring, so that the sealing ring is in a compressed sealing state, then the welding of the first clamping piece and the second clamping piece can be performed, for example, laser welding can be used to weld and fix the first clamping piece and the second clamping piece. Since the compressed sealing ring has a rebound force of 1000-1500N, when the clamp is loosened after welding, the sealing ring will push the first clamping piece to deform towards the loosening direction, causing the sealing ring to loosen or insufficient compression, affecting the sealing reliability of the battery cell.

[0134] Therefore, the battery monomer provided in the application comprises a shell, a pole and a sealing element, the shell comprises a first wall body, the pole comprises a pole body and a clamping structure, the clamping structure is connected with the first wall body and comprises a first clamping element and a second clamping element arranged in connection, the first clamping element and the second clamping element clamp the pole body along the thickness direction of the first wall body, and the sealing element is clamped between the first clamping element and the pole body; the first clamping element is arranged to be bent towards the second clamping element at least at the position where the sealing element is clamped, so that the problem of loosening or insufficient compression of the sealing ring can be effectively improved, and the sealing reliability of the battery monomer is improved.

[0135] For example, when the second clamping element is integrally connected with the pole body by injection molding, and the first clamping element and the second clamping element are connected by welding, when the clamp is loosened after welding, although the rebounding force of the sealing element will push the first clamping element to deform towards the loosening direction, since the part pushed by the sealing element is the bent part of the first clamping element, the bent part has a reverse deformation towards the compression direction by pre-bending, so when the sealing element pushes the bent part to deform towards the loosening direction, the bent part is only pushed back towards the loosening direction to some extent, but the bent part is not pushed to the direction away from the second clamping element to make the sealing ring loosen, that is, the rebounding force of the sealing element only offsets part of the reverse deformation, and the bent part still retains part of the reverse deformation, that is, the bent part is in a state of bending towards the second clamping element, so that the first clamping element can still compress the sealing ring, thereby effectively improving the problem of loosening or insufficient compression of the sealing ring, and improving the sealing reliability of the battery monomer.

[0136] The technical solutions described in the embodiments of the application are suitable for battery monomers, battery devices containing battery monomers, and electric devices using battery devices.

[0137] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the application do not specially limit the above electric devices.

[0138] The following embodiments take the electric device as a vehicle for example for convenient description.

[0139] Please refer toFigure 1 , Figure 1 A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application, the vehicle 1000 is provided with a battery device 100, which can be arranged at a bottom or a head or a tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0140] The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0141] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0142] Please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 is provided for some embodiments of the present application, the battery device 100 includes a battery monomer 102 and a box 101 for accommodating the battery monomer 102. The box 101 can be in various structural forms.

[0143] In some embodiments, the box 101 can include a first box part 1011 and a second box part 1012, the first box part 1011 and the second box part 1012 are covered with each other, and the first box part 1011 and the second box part 1012 jointly define an accommodation space for accommodating the battery monomer 102. The connection position of the first box part 1011 and the second box part 1012 can also be provided with a sealing material piece to realize the sealed connection of the first box part 1011 and the second box part 1012.

[0144] For example, referring to Figure 2 , the first box part 1011 and the second box part 1012 can each be a hollow structure with one side open, the open side of the first box part 1011 covers the open side of the second box part 1012, and the box 101 with the accommodation space is formed. For another example, the second box part 1012 can be a hollow structure with one side open, and the first box part 1011 is in the form of a cover and can cover the open side of the second box part 1012. The box 101 can be in various shapes, such as a cylindrical box, a cuboid box, etc.

[0145] In the battery device 100, the battery cell 102 can be one or multiple. If the battery cell 102 is multiple, the multiple battery cells 102 can be connected in series, in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 102 are connected in series and in parallel. The multiple battery cells 102 can be directly connected in series, in parallel or in a mixed manner, and then the multiple battery cells 102 are accommodated in the box 101. Of course, the multiple battery cells 102 can be connected in series, in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series, in parallel or in a mixed manner to form a whole and are accommodated in the box 101. In some embodiments, the multiple battery cells 102 can be connected by a busbar to realize the parallel connection, the series connection or the mixed connection of the multiple battery cells 102.

[0146] Please refer to Figure 3 , Figure 3 The structure of the battery cell 102 provided in some embodiments of the present application is shown in the figure. The battery cell 102 is in the form of a cuboid, the height direction of the battery cell 102 is the first direction F1, the thickness direction of the battery cell 102 is the second direction F2, and the width direction of the battery cell 102 is the third direction F3. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. Not limited to this, the battery cell 102 in the embodiments of the present application can also be in the form of a cylinder or other shapes, and the battery cell 102 can be a hard-shell battery or a soft-pack battery, etc.

[0147] Please refer to Figure 3 and Figure 4 , Figure 4 The partial cross-sectional view of the battery cell 102 provided in some embodiments of the present application is shown in the figure. In some embodiments of the present application, the battery cell 102 includes a shell 1, an electrode assembly 3 and a pole 2. The electrode assembly 3 is arranged in the shell 1, and the shell 1 includes a first wall 111, and the pole 2 is arranged on the first wall 111. The pole 2 includes a pole body 21 and a clamping structure 22. The pole body 21 is connected with the electrode assembly 3, the clamping structure 22 is connected with the first wall 111, and the clamping structure 22 clamps the pole body 21.

[0148] Exemplarily, referring to Figure 3 and Figure 4 , the shell 1 has a receiving cavity 13, and the electrode assembly 3 includes an active material coated part 32 and a tab part 33. The active material coated part 32 is accommodated in the receiving cavity 13, and the tab part 33 is connected with the active material coated part 32. The electrode assembly 3 includes one or more electrode assemblies (the electrode assembly can be in the form of winding or in the form of stacking). The part of the current collector of the electrode assembly 3 coated with the active material layer constitutes the active material coated part 32, and the part of the current collector not coated with the active material layer constitutes the tab part 33. The tab part 33 includes multiple layers of tab sheets.

[0149] Exemplarily, referring toFigure 3 and Figure 4 The pole column 2 is located on the same side of the electrode assembly 3 as the first wall body 111, that is, the pole column 2 is arranged on the side where the first wall body 111 is located, so that the pole column 2 is arranged on the first wall body 111, for example, when the first wall body 111 is located above the electrode assembly 3, the pole column 2 is also located above the electrode assembly 3; when the first wall body 111 is located below the electrode assembly 3, the pole column 2 is also located below the electrode assembly 3; when the first wall body 111 is located on the side of the electrode assembly 3, the pole column 2 is also located on the same side of the electrode assembly 3.

[0150] The pole column 2 is connected to the first wall body 111 through the clamping structure 22, wherein the connection mode of the clamping structure 22 and the first wall body 111 is not limited, for example, the two can be an integral part (that is, integrally formed), or the two can also be separate parts and assembled, for example, welded, riveted, etc.

[0151] Exemplarily, refer to Figure 3 and Figure 4 To realize the connection between the pole column body 21 and the electrode assembly 3, the active material coating part 32 can be connected to the pole column body 21 through the conductive part 4 and form an electrical conduction. The connection mode of the conductive part 4 and the pole column body 21 is not limited, for example, can include, but is not limited to, ultrasonic welding, ultrasonic pre-welding combined with laser welding, resistance welding, pressure fusion welding, brazing, cementing, etc. In this application, the pole column body 21 can be used for a positive pole column body to connect with the positive electrode of the electrode assembly 3, or can be used for a negative pole column body to connect with the negative electrode of the electrode assembly 3.

[0152] For example, refer to Figure 4 The conductive part 4 can also only include the tab part 33, which is directly connected (for example, ultrasonic welding, ultrasonic pre-welding combined with laser welding, resistance welding, pressure fusion welding, brazing, etc. welding or cementing, etc.) with the pole column body 21, so that the introduction and use of other conductive material parts can be omitted, the material and cost can be reduced, the connection process can be simplified, and the production efficiency can be improved.

[0153] This application is not limited to this, for example, the conductive part 4 can also include not only the tab part 33, for example, can also include a conductive part, and the tab part 33 is indirectly connected with the pole column body 21 through the conductive part. Thus, by indirectly connecting the tab part 33 and the pole column body 21 through the conductive part, the length of the tab part 33 can be shortened, the problems such as wrinkling, bending and breaking of the tab sheet can be improved, and by flexibly designing the shape and material of the conductive part, the connection difficulty with the pole column body 21 can be reduced, and the connection convenience of the conductive part with the pole column body 21 can be improved.

[0154] Exemplarily, refer to Figure 3 and Figure 4The pole column 2 comprises an insulating sealing structure 23, and the clamping structure 22 is insulated and sealed with the pole column body 21 through the insulating sealing structure 23. When the clamping structure 22 is connected with the first wall body 111, the insulating requirement of the pole column body 21 and the shell 1 can be met, and the sealing requirement at the installation position of the pole column body 21 can also be met.

[0155] Please refer to Figure 5 and Figure 6 , Figure 5 the sectional view of the pole column provided in some embodiments of the present application; Figure 6 for Figure 5 the local enlarged view of part A shown in FIG. 4. In some embodiments of the present application, in order to clamp the pole column body 21, the clamping structure 22 comprises a first clamping piece 221 and a second clamping piece 222 which are connected and arranged, and the clamping structure 22 clamps the pole column body 21 through the first clamping piece 221 and the second clamping piece 222.

[0156] Please refer to Figure 5 and Figure 6 , the clamping structure 22 can be arranged around the pole column body 21, that is, the clamping structure 22 is arranged around the pole column body 21 along the extension direction of the cross-sectional profile line of the pole column body 21. The cross section of the pole column body 21 refers to the cross section obtained by cutting the pole column body 21 with a plane perpendicular to the central axis L of the pole column body 21. For example, when the cross section of the pole column body 21 is circular, the pole column body 21 is a circular pole column body, and the cross-sectional profile line of the pole column body 21 is circular; for another example, when the cross section of the pole column body 21 is a racetrack shape, the pole column body 21 is a racetrack-shaped pole column body, and the cross-sectional profile line of the pole column body 21 is a racetrack shape. Of course, the cross section of the pole column body 21 is not limited to circular or racetrack shape, and the cross section of the pole column body 21 can also be other shapes, such as rectangular, elliptical, etc.

[0157] Therefore, by arranging the clamping structure 22 around the pole column body 21, the clamping structure 22 can only clamp the pole column body 21 at the edge of the pole column body 21, without blocking the surface of the pole column body 21 for connecting with the electrode assembly 3, and without blocking the surface of the pole column body 21 for connecting with the busbar component, so that the pole column body 21 can be connected with the electrode assembly 3 and the busbar component respectively.

[0158] The connection manner of the first clamping piece 221 and the second clamping piece 222 is not limited, for example, the first clamping piece 221 and the second clamping piece 222 can be directly connected or indirectly connected; for example, the first clamping piece 221 and the second clamping piece 222 can be separate pieces and are assembled (such as welded, bonded), or the first clamping piece 221 and the second clamping piece 222 can also be processed into an integral piece by integral molding.

[0159] Reference Figure 5 , the first clamping piece 221 and the second clamping piece 222 clamp the pole body 21 along the thickness direction (for example, the first direction F1 shown in the figure) of the first wall body 111; the insulation sealing structure 23 includes a sealing piece 231 clamped between the first clamping piece 221 and the pole body 21, and the first clamping piece 221 is bently arranged towards the second clamping piece 222 at least at the position clamping the sealing piece 231. Figure 5

[0160] Wherein, the "the first clamping piece 221 is bently arranged towards the second clamping piece 222 at least at the position clamping the sealing piece 231" means that in the product form (such as the factory state) of the battery monomer 102, at least the part of the first clamping piece 221 used for clamping the sealing piece 231 presents a bent form towards the second clamping piece 222, so that the first clamping piece 221 is effectively compressed and cannot be loosened, thereby improving the problems of loosening or insufficient compression of the sealing piece 231 and improving the sealing reliability of the battery monomer 102.

[0161] In the above technical solution, by pre-bending at least the part of the first clamping piece 221 used for clamping the sealing piece 231, so that it presents a reverse deformation towards the direction of compressing the sealing piece 231, thereby the reverse deformation amount can resist the rebound force released by the sealing piece 231, so that at least the position of the first clamping piece 221 used for clamping the sealing piece 231 still maintains the bent form of compressing the sealing piece 231 in the product form, so that the first clamping piece 221 can provide sufficient clamping force, so that the sealing piece 231 has sufficient compression amount, thereby improving the problems of loosening or insufficient compression of the sealing piece 231 and improving the sealing reliability of the battery monomer 102.

[0162] In some embodiments, referring to Figure 5 , the first clamping piece 221 and the second clamping piece 222 are weldedly connected, so that the connection position of the first clamping piece 221 and the second clamping piece 222 forms a welding mark, so that the first clamping piece 221 and the second clamping piece 222 are connected by the welding mark.

[0163] In the above technical solution, since the first clamping piece 221 has a reverse deformation amount bent towards the compression direction, after the clamps are removed after welding the first clamping piece 221 and the second clamping piece 222, the reverse deformation of the first clamping piece 221 can simply and effectively overcome the rebounding force of the first clamping piece 221, thereby improving the problems of loosening or insufficient compression of the sealing piece 231 and improving the sealing reliability of the battery monomer 102.

[0164] ​Exemplarily, before welding the first clamping piece 221 and the second clamping piece 222, the first clamping piece 221, the second clamping piece 222, the pole body 1 and the sealing member 231 are assembled together, then the first clamping piece 221 and the second clamping piece 222 are clamped by a clamp to make the sealing member 231 present a compressed state, then the first clamping piece 221 and the second clamping piece 222 can be welded, and after the welding is completed, the clamp is removed, and since the first clamping piece 221 still retains the reverse deformation amount, the compression amount of the sealing member 231 can still meet the demand after the clamp is removed.

[0165] In some schemes, the first clamping piece and the second clamping piece can be an integrally formed piece, and assembly and clamping are achieved by the way of press riveting deformation of the first clamping piece, and for this scheme, pre-tightening force can be provided by controlling the riveting process parameters to overcome the rebounding force of the sealing member 231. However, for the connection mode of welding the first clamping piece and the second clamping piece, pre-tightening force cannot be provided by controlling the riveting process parameters, and therefore, the scheme of pre-bending the first clamping piece 221 in the embodiments of the present application can simply and effectively overcome the rebounding force of the sealing member 231 after the clamp is removed, improve the problem of loosening or insufficient compression amount of the sealing member 231, and improve the sealing reliability of the battery monomer 102.

[0166] In addition, compared with the scheme of press riveting deformation of one of the first clamping piece and the second clamping piece to achieve clamping, in the above embodiments, the first clamping piece 221 and the second clamping piece 222 are connected by welding, which not only can save the press riveting equipment, but also can avoid damage to the pole body caused by the press riveting process, avoid the problem of unreliable sealing caused by insufficient press riveting force, and in short, the welding scheme is convenient to operate and implement, reduces the processing difficulty, and can effectively protect the pole body 21 and improve the sealing reliability of the battery monomer 102.

[0167] In some embodiments, referring to Figure 5 The second clamping piece 222 and the pole body 21 are provided with an insulating member 232, that is, at least part of the insulating member 232 is arranged between the second clamping piece 222 and the pole body 21 to ensure the insulation between the second clamping piece 222 and the pole body 21. The second clamping piece 222 and the pole body 21 are integrally connected by the insulating member 232 through injection molding, that is, the insulating member 232 is injection molded and fixedly connected with the second clamping piece 222 and the pole body 21 in the injection molding process, and the second clamping piece 222, the pole body 21 and the insulating member 232 are connected into an inseparable integrated assembly.

[0168] In this way, after the first clamping member 221 and the second clamping member 222 complete clamping, for example, after the first clamping member 221 and the second clamping member 222 are welded, or after the first clamping member 221 is deformed by pressure riveting, the sealing member 231 is more likely to push the first clamping member 221 to deform in the loosening direction. Thus, for this solution that is more likely to cause the first clamping member 221 to loosen and deform, by setting the first clamping member 221 to have a reverse deformation amount bent towards the pressing direction, the problem of the first clamping member 221 being pushed and rebounded by the sealing member 231 to loosen and deform can be more directly and effectively improved from the root, thereby improving the problem of the sealing member 231 loosening or not being compressed enough.

[0169] In addition, in the above technical solution, since the second clamping member 222 and the pole body 21 are integrally connected by the insulation member 232 through injection molding, the reliability of the second clamping member 222 clamping the pole body 21 and the reliability of the insulation member 232 insulating the second clamping member 222 and the pole body 21 can be improved. In addition, when the solution of the first clamping member 221 and the second clamping member 222 being welded is adopted, the second clamping member 222, the pole body 21, and the insulation member 232 can be connected into an inseparable integrated assembly first, and then the first clamping member 221 and the sealing member 231 are assembled with the integrated assembly, and then the welding of the first clamping member 221 and the second clamping member 222 is performed. In this way, the relative positions of the parts in the components obtained after welding are stable, the assembly efficiency is high, and the yield is high.

[0170] Of course, the present application is not limited to this, for example, in other embodiments, when the first clamping member 221 and the second clamping member 222 are separate parts, they can also be fixedly connected by other ways, such as bonding, perforation connection, etc. Alternatively, the first clamping member 221 and the second clamping member 222 can also be integrally formed, and the assembly with the sealing member 231 and the pole body 21 is completed by the pressure riveting deformation of at least one of the first clamping member 221 and the second clamping member 222. In addition, in some other embodiments, the connection between the second clamping member 222 and the pole body 21 can also not be integrally connected by the insulation member 232 through injection molding, for example, the insulation member 232 can be separately injection molded and clamped between the second clamping member 222 and the pole body 21. In these solutions, as long as the first clamping member 221 still remains bent towards the second clamping member 222 at least at the position clamping the sealing member 231 after the battery monomer 102 is processed, the compression effect on the sealing member 231 can be effectively guaranteed, and the problem of the sealing member 231 loosening or not being compressed enough can be improved.

[0171] For example, in combination with the above technical solutions, Figure 5The insulation member 232 can include an inner insulation member 2321 and an outer insulation member 2322. The inner insulation member 2321 is located between the second clamping member 222 and the pole body 21 to serve as insulation between the second clamping member 222 and the pole body 21. The outer insulation member 2322 is wrapped around the side of the second clamping member 222 that faces away from the first clamping member 221 to serve as insulation between the clamping structure 22 and other components (e.g., a buss bar). Alternatively, in other embodiments, the insulation member 232 can include only the inner insulation member 2321.

[0172] For example, in combination with Figure 5 When the insulation member 232 includes the inner insulation member 2321 and the outer insulation member 2322, and the second clamping member 222 and the pole body 21 are integrally connected by injection molding of the insulation member 232, the inner insulation member 2321 and the outer insulation member 2322 can be injection molded at the same time. For example, a channel can be provided between the second clamping member 222 and the pole body 21, and / or a through hole can be provided on the second clamping member 222, to allow the injected insulation material (e.g., plastic) to flow through, so that the inner insulation member 2321 and the outer insulation member 2322 can be connected and injection molded together.

[0173] Of course, the present application is not limited thereto. For example, the inner insulation member 2321 and the outer insulation member 2322 can be separately formed and then assembled together (e.g., by bonding or the like) at the desired position.

[0174] In addition, the material of the insulation member 232 is not limited and can be any material that can provide insulation, such as plastic, rubber, or the like. When the insulation member 232 is made of plastic, the texture is relatively hard, which can better control the compression amount of the sealing member 231, so that the compression amount of the sealing member 231 can meet the sealing requirement.

[0175] In some embodiments, as shown in Figure 6 The first clamping member 221 includes a bent portion 2211 that participates in clamping the sealing member 231. In the thickness direction of the first wall body 111 (e.g., the first direction F1 shown in Figure 6 ), the side surface of the bent portion 2211 that faces away from the sealing member 231 is a first surface S1 (e.g., the lower surface of the bent portion 2211 shown in Figure 6 ), and the side surface of the bent portion 2211 that faces toward the sealing member 231 is a second surface S2 (e.g., the upper surface of the bent portion 2211 shown in Figure 6 ). At least one of the first surface S1 and the second surface S2 extends in the direction from the first wall body 111 to the pole body 21 (e.g., the direction from left to right shown in Figure 6 ) and toward the second clamping member 222 in the thickness direction of the first wall body 111 (e.g., can extend along a straight line, or an inclined line, or a curved line, or a broken line, or the like).

[0176] Wherein, when the first surface S1 is configured to extend along the direction from the first wall body 111 to the pole body 21 towards the direction close to the second clamping piece 222 (for example, can extend along a straight line, or an oblique line, or a curve, or a broken line, etc.), it means that after the battery monomer 102 is processed, under the rebounding force of the sealing piece 231 on the bent part 221, the first surface S1 still maintains the state of extending along the direction from the first wall body 111 to the pole body 21 towards the direction close to the second clamping piece 222, so as to illustrate that the bent part 2211 effectively overcomes the rebounding force of the sealing piece 231, is not pushed to bend open towards the loosening direction, but maintains the pressing state of the sealing piece 231, and guarantees the sealing effect.

[0177] Wherein, when the second surface S2 is configured to extend along the direction from the first wall body 111 to the pole body 21 towards the direction close to the second clamping piece 222 (for example, can extend along a straight line, or an oblique line, or a curve, or a broken line, etc.), it means that after the battery monomer 102 is processed, under the rebounding force of the sealing piece 231 on the bent part 221, the second surface S2 still maintains the state of extending along the direction from the first wall body 111 to the pole body 21 towards the direction close to the second clamping piece 222, so as to illustrate that the bent part 2211 effectively overcomes the rebounding force of the sealing piece 231, is not pushed to bend open towards the loosening direction, but maintains the pressing state of the sealing piece 231, and guarantees the sealing effect.

[0178] Wherein, when the first surface S1 and the second surface S2 are configured to extend along the direction from the first wall body 111 to the pole body 21 towards the direction close to the second clamping piece 222 (for example, can extend along a straight line, or an oblique line, or a curve, or a broken line, etc.), it means that after the battery monomer 102 is processed, under the rebounding force of the sealing piece 231 on the bent part 221, the first surface S1 and the second surface S2 still maintain the state of extending along the direction from the first wall body 111 to the pole body 21 towards the direction close to the second clamping piece 222, so as to illustrate that the bent part 2211 effectively overcomes the rebounding force of the sealing piece 231, is not pushed to bend open towards the loosening direction, but maintains the pressing state of the sealing piece 231, and guarantees the sealing effect.

[0179] Moreover, if the first surface S1 and the second surface S2 are both configured to extend along a direction from the first wall body 111 to the pole body 21 towards a direction close to the second clamping member 222, the bending portion 2211 can be processed to be in a form of equal wall thickness or close to equal wall thickness, so as to facilitate the processing of the first clamping member 221, and the clamping effect of the bending portion 22 is reliable, which is beneficial to guarantee the compression amount of the sealing member 231. Of course, when the first surface S1 and the second surface S2 are both configured to extend along a direction from the first wall body 111 to the pole body 21 towards a direction close to the second clamping member 222, the bending portion 2211 can also not be processed to be in a form of equal wall thickness or close to equal wall thickness.

[0180] Exemplarily, after the first clamping member 221 is processed and formed, the bending portion 2211 can initially present a state that the first surface S1 and the second surface S2 are both straight (neither bent towards the compression direction nor bent towards the release direction), and then the bending portion 2211 can be bent along a direction from the first surface S1 to the second surface S2, so that the first surface S1 and the second surface S2 are both changed to a form of extending along a direction from the first wall body 111 to the pole body 21 towards a direction close to the second clamping member 222 (for example, can extend along a straight line, or an inclined line, or a curved line, or a zigzag line, etc.), so as to obtain the bending portion 2211 with reverse deformation, so as to overcome the rebound force of the sealing member 231, and this way is beneficial to the processing of the first clamping member 221.

[0181] Of course, the present application is not limited to this, for example, after the first clamping member 221 is processed and formed, the bending portion 2211 can initially present a form that the first surface S1 is bent towards the release direction, and the second surface S2 is straight, and then the bending portion 2211 can be bent along a direction from the first surface S1 to the second surface S2, so that the first surface S1 is changed to a straight surface, and the second surface S2 is in a form of extending along a direction from the first wall body 111 to the pole body 21 towards a direction close to the second clamping member 222. For another example, after the first clamping member 221 is processed and formed, the bending portion 2211 can initially present a form that the first surface S1 is straight, and the second surface S2 is bent towards the release direction, and then the bending portion 2211 can be bent along a direction from the first surface S1 to the second surface S2, so that the second surface S2 is changed to a straight surface, and the first surface S1 is in a form of extending along a direction from the first wall body 111 to the pole body 21 towards a direction close to the second clamping member 222, etc.

[0182] In some embodiments, with reference to Figure 7, the first surface S1 is configured as a slope surface that extends in a direction of approaching the second clamping member 222 along a direction from the first wall body 111 to the pole body 21, i.e., a plane that is arranged in a slope manner, rather than a curved surface or a folded surface. In this way, the first surface S1 can be pushed by a plane jig to bend the folded portion 2211, so that the shape of the first surface S1 is simple and the folded portion 2211 is easy to process.

[0183] In some embodiments, with reference to Figure 7 , when the first surface S1 is configured as a slope surface that extends in a direction of approaching the second clamping member 222 along a direction from the first wall body 111 to the pole body 21, the second surface S2 can also be configured as a slope surface that extends in a direction of approaching the second clamping member 222 along a direction from the first wall body 111 to the pole body 21, i.e., a plane that is arranged in a slope manner, rather than a curved surface or a folded surface. In this way, by configuring the first surface S1 and the second surface S2 as the slope surfaces that extend in the direction of approaching the second clamping member 222 along the direction from the first wall body 111 to the pole body 21, the processing of the first clamping member 221 is facilitated, and the folded portion 2211 can be processed into an equal wall thickness or a near equal wall thickness, so that the processing of the first clamping member 221 is facilitated, and the clamping effect of the folded portion 22 is reliable, which is beneficial to ensuring the compression amount of the sealing member 231.

[0184] Of course, the present application is not limited thereto, and when the first surface S1 is configured as a slope surface that extends in a direction of approaching the second clamping member 222 along a direction from the first wall body 111 to the pole body 21, and the second surface S2 is also configured as a slope surface that extends in a direction of approaching the second clamping member 222 along a direction from the first wall body 111 to the pole body 21, the folded portion 2211 can also not be processed into an equal wall thickness or a near equal wall thickness.

[0185] In some embodiments, with reference to Figure 8 , the folded portion 2211 includes a plurality of sub-folded portions 22110 arranged in sequence along a direction from the first wall body 111 to the pole body 21, i.e., in adjacent two sub-folded portions 22110, one of which is close to the pole body 21 and the other of which is close to the first wall body 111, is folded in a direction of approaching the second clamping member 222.

[0186] That is, the number of the sub-bending portions 22110 is at least two, and the bending angles of the plurality of sub-bending portions 22110 gradually increase along the direction from the first wall body 111 to the pole body 21, that is, the bending angle of the sub-bending portion 22110 closer to the pole body 21 is greater than the bending angle of the sub-bending portion 22110 closer to the first wall body 111. Here, the bending angle is the deflection angle of the sub-bending portion 22110 relative to the reference plane Z towards the second clamping piece 222. The reference plane Z is a plane perpendicular to the thickness direction of the first wall body 111.

[0187] Thus, by arranging the bending portion 2211 to include a plurality of sub-bending portions 22110 arranged in sequence along the direction from the first wall body 111 to the pole body 21, and gradually increasing the bending angles of the plurality of sub-bending portions 22110 along the direction from the first wall body 111 to the pole body 21, the bending portion 2211 is arranged in multiple segments and the bending direction gradually points to the second clamping piece 222, thereby making the structural strength of the bending portion 2211 more reliable and being able to more effectively resist the resilience of the sealing member 231 and more reliably clamp the sealing member 231, thereby improving the sealing effect.

[0188] For example, the side surface of the sub-bending portion 22110 away from the second clamping piece 222 in the thickness direction of the first wall body 111 can be an inclined surface inclined to the reference plane Z, and the side surface of the sub-bending portion 22110 towards the second clamping piece 222 in the thickness direction of the first wall body 111 can be an inclined surface inclined to the reference plane Z, thereby facilitating the processing of the bending portion 2211, and the included angle between one of the two inclined surfaces and the reference plane Z can be the deflection angle of the sub-bending portion 22110 relative to the reference plane Z towards the second clamping piece 222.

[0189] For example, when the bending portion 2211 includes a plurality of sub-bending portions 22110 arranged in sequence along the direction from the first wall body 111 to the pole body 21, the plurality of sub-bending portions 22110 can be bent in batches, that is, one sub-bending portion 22110 is bent first, and then the next sub-bending portion 22110 is bent. Alternatively, when the equipment allows, the plurality of sub-bending portions 22110 can also be bent at the same time.

[0190] In some embodiments, at least two sub-bending portions 22110 are involved in clamping the sealing member 231. That is, the sealing member 231 is clamped by at least two sub-bending portions 22110 together with the pole body 21, thereby dispersing the stress of the bending portion 2211, and the bending portion 2211 can more reliably clamp the sealing member 231, thereby improving the sealing effect. Moreover, this way also facilitates shortening the length of the sub-bending portion 22110, increasing the number of sub-bending portions 22110, and further improving the structural strength of the bending portion 2211.

[0191] In some embodiments, referring to Figure 9 , the second surface S2 comprises a sloping portion S21 and a step portion S22 arranged in sequence along the direction from the first wall body 111 to the pole post body 21, the sloping portion S21 extends towards the direction close to the second clamping member 222 along the direction from the first wall body 111 to the pole post body 21 (for example, can extend along a straight line, or an oblique line, or a curve, or a broken line, etc.), the step portion S22 is formed to protrude towards the direction close to the second clamping member 222 relative to the sloping portion S21, and is formed as a plane perpendicular to the thickness direction of the first wall body 111, at least part of the sealing member 231 is clamped between the step portion S22 and the pole post body 21.

[0192] Wherein, the step portion S22 is perpendicular to the thickness direction of the first wall body 111, that is, perpendicular to the axis of the pole post body 21, in this way, by arranging the step portion S22 to clamp the sealing member 231, compared with the scheme of clamping the sealing member 231 by using a slope, the force uniformity of the sealing member 231 can be improved, the compression uniformity of the sealing member 231 can be improved, the sealing effect can be improved, and by clamping the sealing member 231 by using a plane, no component force along the radial direction of the pole post body 21 is applied to the sealing member 231, so that the stability of the clamping of the sealing member 231 can be improved, so that the sealing member 231 can stably stay at the clamped position, and the sealing effect can be more reliably exerted.

[0193] Exemplarily, the sealing member 231 can be located on the side of the sloping portion S21 close to the pole post body 21. That is, the arrangement position of the sealing member 231 is staggered with the sloping portion S21, and the sealing member 231 is not clamped by the sloping portion S21, in this way, the stability and reliability of the clamping of the sealing member 231 can be further improved.

[0194] In some embodiments, referring to Figure 10 and Figure 11 , the bent portion 2211 extends towards the direction of the pole post body 21 from the connection position P of the second clamping member 222 and the first clamping member 221, and a part of the bent portion 2211 is located on the side of the sealing member 231 away from the pole post body 21. That is, one end of the bent portion 2211 away from the pole post body 21 extends to the connection position of the second clamping member 222 and the first clamping member 221, and beyond the range covered by the sealing member 231, in this way, the overall range of the bent portion 2211 is large, which is convenient for processing, can adapt to the clamping requirements of sealing members 231 of various sizes, and has a wide range of applications.

[0195] In some embodiments, referring to Figure 10 and Figure 11The second clamping piece 222 includes a clamping portion 2222 and a lap portion 2221 arranged in sequence along the direction from the first wall body 111 to the pole body 21, the lap portion 2221 laps on the bent portion 2211, and the edge of the pole body 21 is clamped between the clamping portion 2222 and the bent portion 2211. In this way, the first clamping piece 221 and the second clamping piece 222 can be lap-jointed, so that the stability of the joint and the connection reliability can be improved, and the pole body 21 and the sealing piece 231 can be clamped more reliably, and the sealing performance can be improved. It should be noted that in the embodiment, the first clamping piece 221 and the second clamping piece 222 can be welded, but are not limited to welding, for example, can also be bonded or connected by a fastener such as a rivet, and the like.

[0196] In some embodiments, with reference to Figure 5 and Figure 6 The first clamping piece 221 includes an extension portion 2212, the bent portion 2211 is connected to one side of the extension portion 2212 close to the pole body 21 and is bent towards the direction of the second clamping piece 222 relative to the extension portion 2212, and the second clamping piece 222 is connected to the first clamping piece 221 at the end position of the extension portion 2212 away from the bent portion 2211 (i.e., the connection position P of the second clamping piece 222 and the first clamping piece 221 is arranged at the end position of the extension portion 2212 away from the bent portion 2211), and at least part of the extension portion 2212 is located on the side of the sealing piece 231 away from the pole body 21.

[0197] That is, the end of the bent portion 2211 away from the pole body 21 does not extend to the connection position of the second clamping piece 222 and the first clamping piece 221, so that the first clamping piece 221 can be bent as needed, and the connection position of the extension portion 2212 and the bent portion 2211 is bent, so that the structural strength at this position can be enhanced, and the bent portion 2211 can more reliably clamp the sealing piece 231 and improve the sealing effect.

[0198] Further, with reference to Figure 5 and Figure 6 The second clamping piece 222 includes a clamping portion 2222 and a lap portion 2221 arranged in sequence along the direction from the first wall body 111 to the pole body 21, the lap portion 2221 laps on the bent portion 2211, and the edge of the pole body 21 is clamped between the clamping portion 2222 and the bent portion 2211.

[0199] Thus, by setting the portion of the first clamping piece 221 for cooperating with the second clamping piece 222 to also include the extension portion 2212, the extension portion 2212 does not need to extend towards the direction close to the second clamping piece 222 as the bending portion 2211 does for clamping the sealing piece 231, so that the extension portion 2212 can be kept parallel to the lap portion 2221, for example, both are perpendicular to the axis of the pole body 21, or in other words, perpendicular to the thickness direction of the first wall body 111, thereby improving the lap stability of the second clamping piece 222 and the first clamping piece 221, so as to facilitate improving the connection reliability of the first clamping piece 221 and the second clamping piece 222, so that the pole body 21 and the sealing piece 231 can be clamped more reliably, and the sealing performance is improved.

[0200] In some embodiments, with reference to Figure 5 and Figure 6 , and in combination with Figure 11 , the clamping portion 2222 is bent towards the direction away from the first clamping piece 221 relative to the lap portion 2221 to form a clamping groove 223 between the clamping portion 2222 and the bending portion 2211, and the edge of the pole body 21 extends into the clamping groove 223 and is clamped between the clamping portion 2222 and the bending portion 2211. Thus, by setting the second clamping piece 222 to have the above-mentioned bending shape, the structure of the first clamping piece 221 can be simplified, so that the first clamping piece 221 and the second clamping piece 222 can jointly and stably and reliably clamp the pole body 21.

[0201] In some embodiments, with reference to Figure 4 , Figure 5 and Figure 6 , and in combination with Figure 11 , the first clamping piece 221 includes a connecting segment 221a and a cantilever segment 221b which are sequentially arranged along the direction from the first wall body 111 to the pole body 21, the connecting segment 221a is connected with the first wall body 111, and the cantilever segment 221b is recessed to form a sunken groove 221c relative to the connecting segment 221a towards the direction away from the second clamping piece 222, and the lap portion 2221 is embedded in the sunken groove 221c to lap with the cantilever segment 221b.

[0202] Thus, by setting the sunken groove 221c, the effect of pre-positioning can be achieved, the assembly efficiency is improved, and when the first clamping piece 221 and the second clamping piece 222 are connected, the cooperation stability of the first clamping piece 221 and the second clamping piece 222 can be improved, facilitating reliable connection of the two, so that the pole body 21 and the sealing piece 231 can be clamped more reliably, and the sealing performance is improved.

[0203] Exemplarily, with reference to Figure 6When the bending portion 2211 extends from the connecting position of the second clamping member 222 and the first clamping member 221 to the direction of the pole body 21, the overlapping portion 2221 can only include the bending portion 2211.

[0204] Exemplarily, referring to Figure 11 When the first clamping member 221 includes the extending portion 2212, the bending portion 2211 is connected to the side of the extending portion 2212 close to the pole body 21, and is bent to the direction of the second clamping member 222 relative to the extending portion 2212, the overlapping portion 2221 can simultaneously include the extending portion 2212 and the bending portion 2211.

[0205] Exemplarily, referring to Figure 13 In the direction from the first wall body 111 to the pole body 21, the length of the extending portion 2212 is L2, and the length of the overlapping portion 2221 is L0, L2≥L0≥1.72mm. Thus, it is beneficial for the assembly connection of the first clamping member 221 and the second clamping member 222.

[0206] Wherein, the extending portion 2212 and the overlapping portion 2221 can be configured as a flat structure arranged perpendicular to the thickness direction of the first wall body 111, or can also be configured as an inclined structure (i.e. at an angle with the plane perpendicular to the thickness direction of the first wall body 111), or a curved structure, or a concave-convex structure, etc., which will not be described here.

[0207] Exemplarily, referring to Figure 13 In the direction from the first wall body 111 to the pole body 21, the length of the second surface S2 of the bending portion 2211 is L3, and the length of the part of the sealing member 231 clamped by the first clamping member 221 is W0, L3≥W0≥1.1mm. Thus, the bending portion 2211 can provide a sufficient area for the compression of the sealing member 231, so as to overcome the rebound of the sealing member to provide sufficient compression amount.

[0208] Exemplarily, referring to Figure 13 And Figure 14 The first clamping member 221 includes a cantilever segment 221b arranged opposite to the second clamping member 222 along the thickness direction of the first wall body 111, the cantilever segment 221b is staggered with the first wall body 111, the cantilever segment 221b includes the bending portion 2211, in the direction from the first wall body 111 to the pole body 21, the length of the cantilever segment 221b in the direction perpendicular to the thickness direction of the first wall body 111 is L1, the value range of L1 is 4mm-20mm, and the reference plane Z is perpendicular to the thickness direction of the first wall body 111 (for example Figure 6The angle θ between the second surface S2 and the reference plane Z is in the range of 1.5° to 10°. For example, L1 can be 4 mm, 5 mm, 10 mm, 12 mm, 15 mm, 17 mm, 20 mm, etc., and θ can be 1.5°, 3°, 5°, 7°, 9°, 10°, etc. Thus, from the perspective of deflection calculation, the bending portion 2211 can effectively overcome the rebound of the seal to provide sufficient compression. In the present embodiment, the first surface S1 and the second surface S2 can be parallel or not parallel.

[0209] For example, the length of the cantilever section 221b in the direction perpendicular to the thickness direction of the first wall body 111 is L1, which is the length of the force arm of the cantilever section 221b, the length of the extension portion 2212 in the direction perpendicular to the thickness direction of the first wall body 111 is L2, which is the length of the force arm of the extension portion 2212, and the length of the bending portion 2211 in the direction perpendicular to the thickness direction of the first wall body 111 is L4, which is the length of the force arm of the bending portion 2211. The length of the force arm L4 of the bending portion 2211 can be related to the length L3 of the second surface S2 of the bending portion 2211 and the angle θ by a trigonometric function. It is assumed that the length of the force arm L1 of the cantilever section 221b is the sum of the length of the force arm L2 of the extension portion 2212 and the length of the force arm L4 of the bending portion 2211.

[0210] It is assumed that the cross section of the cantilever section 221b is rectangular, and in the case where the elastic modulus E and the moment of inertia I of the selected material of the cantilever section 221b are known and the maximum rebound force P of the seal 231 after compression is known, the relationship between the length of the force arm L1 of the cantilever section 221b and the angle θ can be determined according to the deflection calculation formula and according to the length L3 of the second surface S2 of the extension portion 2212 and the length of the force arm of the bending portion 2211, so that the rebound force of the seal 231 can be effectively overcome. For example, when L1 is in the range of 4 mm to 20 mm and θ is in the range of 1.5° to 10°, for example, when L1 is 5 mm and θ is 1.5°, the rebound force of the seal 231 can be effectively overcome.

[0211] For example, referring to Figure 5 and Figure 6 , and combining Figure 11 , the end of the lap portion 2221 away from the clamping portion 2222 is welded to the connecting section 221a. Thus, the cantilever section 221b is recessed to form a sink 221c relative to the connecting section 221a in the direction away from the second clamping member 222, and the lap portion 2221 is embedded in the sink 221c to lap with the cantilever section 221b. The connecting section 221a can naturally be opposite to the lap portion 2221, which facilitates the welding connection of the two, is convenient to operate and has reliable connection.

[0212] In some embodiments, with reference to Figure 12 The first clamping piece 221 includes a cantilever section 221b arranged opposite to the second clamping piece 222 along the thickness direction of the first wall body 111, the cantilever section 221b is staggered with the first wall body 111, the cantilever section 221b includes a bending section 2211, and the wall thickness T1 of the cantilever section 221b away from the root end of the pole body 21 is greater than the wall thickness T2 of the cantilever section 221b close to the tip end of the pole body 21. Thus, the root strength of the cantilever section 221b can be improved, the supporting effect of the first clamping piece 221 on the second clamping piece 222 is improved, and the installation reliability and working stability of the pole body 21 are improved.

[0213] Exemplarily, the first clamping piece 221 includes a connecting section 221a and a cantilever section 221b arranged in sequence along the direction from the first wall body 111 to the pole body 21, in combination with Figure 4 The connecting section 221a is connected with the first wall body 111, the second clamping piece 222 is arranged opposite to the cantilever section 221b along the thickness direction of the first wall body 111, the cantilever section 221b includes a bending section 2211, and the wall thickness T1 of the cantilever section 221b away from the root end of the pole body 21 is greater than the wall thickness T2 of the cantilever section 221b close to the tip end of the pole body 21. Thus, the root strength of the cantilever section 221b can be improved, the supporting effect of the first clamping piece 221 on the second clamping piece 222 is improved, and the installation reliability and working stability of the pole body 21 are improved.

[0214] In some embodiments, with reference to Figure 12 When the wall thickness T1 of the cantilever section 221b away from the pole body 21 is greater than the wall thickness T2 of the cantilever section 221b close to the tip end of the pole body 21, the wall thickness of the cantilever section 221b can be arranged to gradually decrease along the direction from the first wall body 111 to the pole body 21. Thus, the wall thickness of the cantilever section 221b is in a gradual change form, so that the structure of the cantilever section 221b is simple, stable, and easy to process. Of course, the present application is not limited thereto, for example, the wall thickness of the cantilever section 221b can also be arranged to decrease in steps, etc.

[0215] In some embodiments, with reference to Figure 12 In the thickness direction of the first wall body 111, the side surface of the cantilever section 221b away from the second clamping piece 222 is a third surface S3, and the third surface S3 is overall configured as an inclined surface extending in a direction inclined toward the second clamping piece 222 along the direction from the first wall body 111 to the pole body 21. Thus, the structure of the cantilever section 221b can be further simplified, the cantilever section 221b is easy to process, and the bending section 2211 is formed.

[0216] Exemplarily, the cantilever section 221b can be arranged in a form of wall thickness reduction first, and then the cantilever section 221b is bent as a whole relative to the connecting section 221a towards the direction of the second clamping member 221, so that the bent section 2211 can be obtained.

[0217] Exemplarily, referring to Figure 12 , the included angle β between the third surface S3 and the reference plane Z perpendicular to the thickness direction of the first wall body 111 is 20°-40°, for example, β can be 20°, 25°, 30°, 35°, 40°, etc. In this way, when the length L1 of the cantilever section 221b in the thickness direction perpendicular to the first wall body 111 is 4mm-20mm, and the included angle θ between the second surface S2 and the reference plane Z is in the range of 1.5°-10°, a sufficient reinforcing thickness can be obtained.

[0218] In some embodiments, referring to Figure 4 and Figure 5 , the housing 1 is provided with an electrode assembly 3, the electrode assembly 3 is electrically connected with the pole body 21 through the conductive part 4, and the first clamping member 221 is arranged on the side of the second clamping member 222 close to the electrode assembly 3. Therefore, since the first clamping member 221 is arranged on the side of the second clamping member 222 close to the electrode assembly 3, and the sealing member 231 is clamped between the first clamping member 221 and the pole body 21, the sealing member 231 can more effectively prevent the electrolyte in the housing 1 from entering the fit clearance between the clamping structure 22 and the pole body 21, thereby more effectively improving the leakage problem and improving the corrosion problem caused by the electrolyte to the fit clearance, and improving the installation reliability and working stability of the pole body 21.

[0219] Exemplarily, the first clamping member 221 and the first wall body 111 are separate parts and are assembled. Therefore, the overall assembly of the battery monomer 102 is facilitated, for example, the clamping structure 22, the pole body 21 and the sealing member 231 can be assembled into a pole part first, and then the pole part is assembled to the first wall body 111. Since the pressure during assembly of the sealing member 231 is satisfied during assembly of the pole part, when the pole part is installed to the first wall body 111, it is not necessary to apply a larger pressure to the first wall body 111 to ensure sealing, thereby protecting the first wall body 111.

[0220] Exemplarily, the first clamping member 221 and the first wall body 111 are integrally formed. Therefore, the sealing performance of the connection between the first clamping member 221 and the first wall body 111 can be improved.

[0221] Of course, the present application is not limited thereto, for example, in other embodiments of the present application, the first clamping member 221 can also be arranged on the side of the second clamping member 222 away from the electrode assembly 3.

[0222] In some embodiments, referring to Figure 5 and Figure 6 , the first clamping piece 221 is provided with a protruding portion 2214 at the end close to the pole body 21, the protruding portion 2214 protrudes towards the direction of the second clamping piece 222, the sealing piece 231 is formed with a groove 2313 at the position corresponding to the protruding portion 2214, the groove 2313 is open towards the direction of the electrode assembly 3, and the protruding portion 2214 is embedded in the groove 2313. In this way, through the embedding cooperation of the protruding portion 2214 and the groove 2313, the installation stability of the sealing piece 231 can be improved, so that the sealing piece 231 can play a reliable sealing role.

[0223] In some embodiments, referring to Figure 5 and Figure 6 , the pole body 21 includes a central portion 211 and an edge portion 212, the edge portion 212 is arranged around the central portion 211, the central portion 211 includes an inner protruding portion 2111 protruding towards the direction close to the electrode assembly 3 relative to the edge portion 212, and an outer protruding portion 2112 protruding towards the direction away from the electrode assembly 3 relative to the edge portion 212; the sealing piece 231 includes a sealing portion 2311 and a separation portion 2312, the sealing portion 2311 is clamped between the first clamping piece 221 and the edge portion 212, and the separation portion 2312 is arranged on the side of the first clamping piece 221 away from the first wall body 111 and is isolated between the inner protruding portion 2111 and the first clamping piece 221.

[0224] In this way, by arranging the inner protruding portion 2111, the distance between the pole body 21 and the electrode assembly 3 can be shortened, so that the connection between the pole body 21 and the electrode assembly 3 can be simplified, and in addition, it can be understood that the sealing piece 231 can be of an insulating sealing material, for example, can be of a rubber material, and by arranging the separation portion 2312, an insulating effect can be achieved, the short-circuit connection of the first clamping piece 221 and the pole body 21 can be simply and effectively avoided, and the introduction of other insulating parts is omitted, the structure and assembly are simplified, and the reliability of the battery monomer 102 is improved.

[0225] For example, the inner protruding portion 2111 can protrude towards the direction close to the electrode assembly 3 relative to the first clamping piece 221. Alternatively, for example, the inner protruding portion 2111 can also be omitted or not protrude towards the direction close to the electrode assembly 3 relative to the first clamping piece 221, for example, in combination with Figure 11 , the pole 2 is formed with a receiving groove 6 recessed towards the direction away from the electrode assembly 3, so that at least part of the conductive portion 4 can be received in the receiving groove 6 and connected with the pole body 21. In this way, the space occupation of the conductive portion 4 in the shell 1 can be reduced, and the energy density of the battery monomer 102 can be improved. The forming mode of the receiving groove 6 is not limited, for example, the receiving groove 6 can be recessed by the pole body 21, or the receiving groove 6 can also be defined by the pole body 21 and the first clamping piece 221 together.

[0226] The edge portion 212 can be configured as a flat structure arranged perpendicular to the thickness direction of the first wall body 111, or can also be configured as an inclined structure, a curved structure, a concave-convex structure, etc. matched with the clamping structure 22, which will not be described here.

[0227] It should be noted that the pole body 21 described herein can be a positive pole body or a negative pole body. Depending on the positive or negative pole, the material of the pole body 21 is different, for example, it can be a pure aluminum material or a copper-aluminum composite material.

[0228] In the embodiments of the present application, the first clamping piece 221 and the second clamping piece 222 can be punched or extruded, which is mature in process, low in cost and high in structural strength.

[0229] As shown in some embodiments of the present application, Figure 3 The battery monomer 102 also includes a pressure relief device 5, which is arranged on the same side of the pole 2. Alternatively, in some other embodiments of the present application, the pressure relief device 5 and the pole 2 can also be located on the opposite side.

[0230] Exemplarily, the shell 1 can be surrounded by a plurality of different wall surfaces, one of which is the first wall body 111, and one or more poles 2 can be arranged on the first wall body 111. When the pressure relief device 5 is also arranged on the first wall body 111, the pressure relief device 5 and the pole 2 are located on the same side; when the pressure relief device 5 is arranged on the wall surface other than the first wall body 111, the pressure relief device 5 and the pole 2 are located on the opposite side.

[0231] Exemplarily, the pressure relief device 5 can be an explosion-proof valve mounted on the shell 1, or a thinned region integrally formed on the shell 1. Thus, by arranging the pressure relief device 5, when the pressure in the shell 1 exceeds the preset value, the pressure relief device 5 can be used to direct the pressure relief, thereby improving the reliability of the battery monomer 102.

[0232] Exemplarily, the pressure relief device 5 and the pole 2 are located on the same side. Since the pole 2 is arranged on the first wall body 111, when the pressure relief device 5 is also arranged on the first wall body 111, the pressure relief device 5 and the pole 2 are located on the same side, for example, both are arranged on the top of the battery monomer 102, or both are arranged on the bottom of the battery monomer 102, or both are arranged on the same side of the battery monomer 102. Thus, the design of other shell walls (for example, the second wall body 112) other than the first wall body 111 can be simplified, and the structure and processing of the battery monomer 102 can be simplified. The shell 1 can be surrounded by a plurality of non-coplanar wall surfaces, for example, a cuboid shell 1 is surrounded by six wall surfaces, one of which is the first wall body 111. Arranging the pressure relief device 5 and the pole 2 on the same wall surface means that they are located on the same side.

[0233] Exemplarily, the pressure relief device 5 is located at a side different from the pole column 2. Since the pole column 2 is arranged on the first wall body 111, when the pressure relief device 5 is arranged on a wall other than the first wall body 111 of the shell 1, for example, the first wall body 111 is an end of the shell body opposite to the opening, the second wall body 112 is a side wall adjacent to the opening of the shell body, the pressure relief device 5 is arranged on the second wall body 112, or the pressure relief device 5 is arranged on the shell cover, the pressure relief device 5 is located at a side different from the pole column 2. Thus, without considering the space occupied by the pressure relief device 5 on the first wall body 111 to reduce the volume of the pole column 2, the shape and area of the pole column 2 can be flexibly designed as needed. Wherein, the shell 1 can be surrounded by multiple wall surfaces that are not coplanar, for example, the shell 1 in a cuboid shape is surrounded by six wall surfaces, one of which is the first wall body 111, the pressure relief device 5 is arranged on any wall surface other than the first wall body 111, and the pole column 2 is arranged on the first wall body 111, and the two are located at different sides.

[0234] According to the second aspect of the present application, the present application further provides a battery device 100 comprising the battery monomer 102 of any of the above-mentioned schemes. It is worth mentioning that the battery device 100 according to the embodiments of the present application can include a box 101, and can also not include a box 101. Thus, since the reliability of the battery monomer 102 according to the embodiments of the present application is improved, the performance of the battery device 100 is improved.

[0235] Exemplarily, the battery device 100 further comprises a current collecting component, and the battery monomers 102 are multiple and at least two of which are electrically connected through the current collecting component. Thus, the series and / or parallel connection of multiple battery monomers 102 can be realized. For example, when multiple battery monomers 102 are connected in series, the pole column 2 of the negative electrode of one battery monomer 102 is connected with the pole column 2 of the positive electrode of the next battery monomer 102 through one current collecting component, and at the same time, the pole column 2 of the positive electrode of the battery monomer 102 is connected with the pole column 2 of the negative electrode of the previous battery monomer 102 through another current collecting component.

[0236] Exemplarily, in combination with Figure 2 , the battery device 100 comprises a box 101, and the battery monomers 102 are multiple and contained in the box 101, and the bottom of the box 101 is a box bottom plate 1013. The pole column 2 is arranged on the side of the shell 1 close to the box bottom plate 1013, or arranged on the side of the shell 1 away from the box bottom plate 1013.

[0237] During the use of the battery device 100, for example, during the use in a vehicle, the box bottom plate 1013 is located at the bottom of the box 101 in the direction of gravity, so that when the pole 2 is arranged at the side of the shell 1 close to the box bottom plate 1013, it is indicated that the pole 2 is located at the bottom of the shell 1 in the direction of gravity, and when the pole 2 is arranged at the side of the shell 1 away from the box bottom plate 1013, it is indicated that the pole 2 is located at the top of the shell 1 in the direction of gravity. Thus, the relative position of the pole 2 and the box bottom plate 1013 is not limited, and the flexible setting of the orientation of the battery monomer 102 and the box 101 can be realized.

[0238] When the pole 2 of the battery monomer 102 is arranged at the side of the shell 1 facing the box bottom plate 1013, the battery monomer 102 is in an inverted state, and the product of pressure relief is sprayed in the direction away from the passenger compartment, which is safer. When the pole 2 of the battery monomer 102 is arranged at the side of the shell 1 away from the box bottom plate 1013, the battery monomer 102 is in a normal state, and the electrolyte is not easy to leak.

[0239] According to the third aspect of the present application, the embodiments of the present application also provide a power utilization device, which comprises the battery device 100 of any of the above-mentioned schemes, and the battery device 100 is used to provide power for the power utilization device. The power utilization device can be any of the above-mentioned devices or systems using the battery device 100. Since the performance of the battery device 100 is improved, the working power performance of the power utilization device is improved.

[0240] According to the fourth aspect of the present application, with reference to Figure 14 , the embodiments of the present application also provide a processing method of the battery monomer 102, which is used to process the battery monomer 102 of any of the above-mentioned schemes, and the processing method comprises the following steps: step S1, bending the first clamping piece 221; step S2, assembling the bent first clamping piece 221 with the second clamping piece 222, the pole body 21, and the sealing piece 231; and step S3, welding the first clamping piece 221 and the second clamping piece 222.

[0241] By means of the step S1, bending the first clamping piece 221, the part of the first clamping piece 221 for clamping the sealing piece 231 is formed in a bent form towards the direction of the second clamping piece 222, so that after the bent first clamping piece 221 is assembled with the second clamping piece 222, the pole body 21, and the sealing piece 231, and the first clamping piece 221 and the second clamping piece 222 are welded, the rebounding force of the sealing piece 231 cannot bounce the first clamping piece 221 away, and the first clamping piece 221 still remains in the bent form towards the second clamping piece 222 at least at the position of clamping the sealing piece 231.

[0242] In some embodiments of the present application, with reference to Figure 14 and Figure 15The above-mentioned "step S2, the step of assembling the bent first clamping piece 221 with the second clamping piece 222, the pole body 21, and the sealing piece 231 together" further comprises a step: step S4, connecting the second clamping piece 222 and the pole body 21 into an integrated body by injection molding. Thus, the second clamping piece 222 and the pole body 21 are provided with the insulating piece 232, and the second clamping piece 222 and the pole body 21 are connected into an integrated body by injection molding through the insulating piece 232. It is worth noting that the sequence of steps S4 and S1 is not limited, and they can be performed simultaneously or sequentially.

[0243] For example, in combination with Figure 16 and Figure 17 , when processing the battery monomer 102, the second clamping piece 222 and the pole body 21 can be placed in a relatively appropriate matching position, and then connected into an integrated body by injection molding. In this way, the second clamping piece 222 and the pole body 21 are provided with the insulating piece 232, and the second clamping piece 222 and the pole body 21 are connected into an integrated body by injection molding through the insulating piece 232. On the other hand, the first clamping piece 221 is bent, so that the part of the first clamping piece 221 for clamping the sealing piece 231 is formed in a bent form towards the second clamping piece 222. Then, in combination with Figure 18 , the bent first clamping piece 221, the sealing piece 231, and the injection-molded second clamping piece 222 and the pole body 21 can be assembled together. Then, in combination with Figure 19 , the sealing piece 231 is in a clamped and compressed state by applying a restraining force by the clamp, and then the first clamping piece 221 and the second clamping piece 222 are welded, for example, laser welded. Then, the clamp can be removed, and after the clamp is removed, the first clamping piece 221 still presents a bent form at least at the position clamping the sealing piece 231 towards the second clamping piece 222, maintaining a large elastic force, ensuring that the compression amount of the sealing piece 231 meets the requirements. Thus, through the above steps, the pole part 20 can be obtained.

[0244] On the other hand, a plurality of wound battery cells are paired and an ultrasonic pre-welding of the tab piece is performed to obtain the tab part 33, in combination with Figure 20 , the pre-welded tab part 33 passes through the mounting hole 1111 on the first wall body 111; then, in combination with Figure 21 , the above-mentioned pole part 20 is placed outside the first wall body 111, and the tab part 33 is welded with the pole body 21 in the pole part 20; then, in combination with Figure 22 , the pole part 20 is turned over by 90°, the pole part 20 is covered on the mounting hole 1111, and the edge of the first clamping piece 221 is welded with the first wall body 111, realizing the sealing of the battery monomer 102, and subsequent sealing detection, so that the battery monomer 102 can be obtained.

[0245] Of course, the present application is not limited thereto, for example, the tab portion 33 and the tab body 21 in the tab member 20 can be welded first, then the electrode assembly 3 and the tab member 20 are loaded into the case 1 together, the tab member 20 is passed through the mounting hole 1111 on the first wall body 111, then the tab member 20 is turned over 90°, the tab member 20 is covered on the mounting hole 1111, and the edge of the first clamping piece 221 is welded with the first wall body 111 to realize the sealing of the battery monomer 102. Alternatively, the tab member 20 can not pass through the mounting hole 1111 on the first wall body 111, but be turned over 90° in the case 1, be covered on the mounting hole 1111 from the inside of the case 1, and then the edge of the first clamping piece 221 is welded with the first wall body 111 to realize the sealing of the battery monomer 102.

[0246] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0247] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell, characterized by, The application relates to a shell, a pole and a seal. The shell comprises a first wall body. The pole comprises a pole body and a clamping structure connected with the first wall body, and the clamping structure comprises first and second clamping members arranged in connection and clamping the pole body along the thickness direction of the first wall body. The seal is clamped between the first clamping member and the pole body. The first clamping member is arranged in a bent manner at least at the position of clamping the seal towards the second clamping member.

2. The battery cell of claim 1, wherein, The first and second clamping members are arranged in connection through a welding mark.

3. The battery cell of claim 2, wherein, An insulating member is arranged between the second clamping member and the pole body, and the second clamping member and the pole body are integrally connected through injection molding of the insulating member.

4. The battery cell of claim 1, wherein, The first clamping member comprises a bent portion participating in clamping the seal, and in the thickness direction of the first wall body, the side surface of the bent portion away from the seal is a first surface, the side surface of the bent portion towards the seal is a second surface, and at least one of the first surface and the second surface extends along the direction from the first wall body to the pole body towards the direction close to the second clamping member.

5. The battery cell of claim 4, wherein, The first surface is integrally configured as an inclined surface extending along the direction from the first wall body to the pole body towards the direction close to the second clamping member.

6. The battery cell of claim 5, wherein, The second surface is integrally configured as an inclined surface extending along the direction from the first wall body to the pole body towards the direction close to the second clamping member.

7. The battery cell of claim 4, wherein, The bent portion comprises a plurality of sub-bent portions arranged in sequence along the direction from the first wall body to the pole body, and in the adjacent two sub-bent portions, one close to the pole body is bent relative to the other close to the first wall body towards the direction close to the second clamping member.

8. The battery cell of claim 7, wherein, At least two sub-bent portions participate in clamping the seal.

9. The battery cell of claim 4, wherein, The second surface comprises an inclined portion and a step portion arranged in sequence along the direction from the first wall body to the pole body, the inclined portion extends along the direction from the first wall body to the pole body towards the direction close to the second clamping member, the step portion protrudes relative to the inclined portion towards the direction close to the second clamping member and is formed as a plane perpendicular to the thickness direction of the first wall body, and at least part of the seal is clamped between the step portion and the pole body.

10. The battery cell of claim 9, wherein, The seal is located on the side of the inclined portion close to the pole body.

11. The battery cell of claim 4, wherein, The bent portion extends from the connection position of the second clamping member and the first clamping member towards the direction of the pole body, and a part of the bent portion is located on the side of the seal away from the pole body.

12. The battery cell of claim 11, wherein, The second clamping member comprises a lapping portion and a clamping portion arranged in sequence along the direction from the first wall body to the pole body, the lapping portion lapping on the bent portion, and the edge of the pole body is clamped between the clamping portion and the bent portion.

13. The battery cell according to claim 4, characterized in that, The first clamping piece comprises an extension part, the bending part is connected to one side of the extension part close to the pole body, and is bent towards the second clamping piece relative to the extension part, the second clamping piece is connected to the first clamping piece at the end of the extension part away from the bending part, and at least part of the extension part is located at the side of the sealing piece away from the pole body.

14. The battery cell of claim 13, wherein the cathode comprises a lithium metal oxide. The second clamping piece comprises a clamping part and a lap part arranged in sequence along the direction from the first wall body to the pole body, the lap part is parallel to and overlaps the extension part, and the edge of the pole body is clamped between the clamping part and the bending part.

15. The battery cell according to claim 12, characterized in that, The clamping part is bent towards the direction away from the first clamping piece relative to the lap part to form a clamping groove between the clamping part and the bending part, and the edge of the pole body extends into the clamping groove and is clamped between the clamping part and the bending part.

16. The battery cell of claim 12, wherein the cathode comprises a lithium metal oxide. The first clamping piece comprises a connecting segment and a cantilever segment arranged in sequence along the direction from the first wall body to the pole body, the connecting segment is connected to the first wall body, the cantilever segment is recessed to form a sunken groove relative to the connecting segment towards the direction away from the second clamping piece, and the lap part is embedded in the sunken groove to overlap the cantilever segment.

17. The battery cell of claim 16, wherein the cathode comprises a lithium metal oxide. The end of the lap part away from the clamping part is welded to the connecting segment.

18. The battery cell of claim 14, wherein, In the direction from the first wall body to the pole body, the length of the extension part is L2, and the length of the lap part is L0, L2≥L0.

19. The battery cell of claim 18, wherein, L2≥L0≥1.72mm.

20. The battery cell of claim 4, wherein, In the direction from the first wall body to the pole body, the length of the second surface of the bending part is L3, and the length of the part of the sealing piece clamped by the first clamping piece is W0, L3≥W0.

21. The battery cell of claim 20, wherein, L3≥W0≥1.1mm.

22. The battery cell of claim 4, wherein, The first clamping piece comprises a cantilever segment arranged opposite to the second clamping piece along the thickness direction of the first wall body, the cantilever segment is staggered with the first wall body, the cantilever segment comprises the bending part, and the wall thickness of the root end of the cantilever segment away from the pole body is greater than the wall thickness of the tip end of the cantilever segment close to the pole body.

23. The battery cell of claim 22, wherein, The wall thickness of the cantilever segment gradually decreases along the direction from the first wall body to the pole body.

24. The battery cell of claim 23, wherein, In the thickness direction of the first wall body, the side surface of the cantilever segment away from the second clamping piece is a third surface, and the third surface is configured as an inclined surface extending towards the direction close to the second clamping piece along the direction from the first wall body to the pole body.

25. The battery cell according to claim 4, characterized in that, The first clamping piece comprises a cantilever segment arranged opposite to the second clamping piece along the thickness direction of the first wall body, the cantilever segment is staggered with the first wall body, the cantilever segment comprises the bending part, and in the direction from the first wall body to the pole body, the length of the cantilever segment perpendicular to the thickness direction of the first wall body is L1, and the included angle θ between the second surface and the reference plane perpendicular to the thickness direction of the first wall body is 1.5°-10°.

26. The battery cell of claim 25, wherein, The wall thickness of the cantilever section gradually decreases along a direction from the first wall body to the pole body. A side surface of the cantilever section, which is away from the second clamping piece, is a third surface. The third surface is configured as a slope that extends in a direction that is inclined towards the second clamping piece along a direction from the first wall body to the pole body. An included angle β between the third surface and a reference plane that is perpendicular to the thickness direction of the first wall body is 20°-40°.

27. The battery cell of claim 1, wherein, The housing is provided with an electrode assembly. The electrode assembly is electrically connected to the pole body through a conductive part. The first clamping piece is arranged on a side of the second clamping piece that is close to the electrode assembly.

28. The battery cell of claim 27, wherein, The first clamping piece and the first wall body are separate parts and are assembled together.

29. The battery cell of claim 27, wherein, The first clamping piece and the first wall body are integrally formed.

30. The battery cell of claim 27, wherein, The first clamping piece is provided with a protruding part at an end portion that is close to the pole body. The protruding part protrudes towards the second clamping piece. The sealing piece is provided with a groove at a position corresponding to the protruding part. The groove is open towards the electrode assembly. The protruding part is embedded in the groove.

31. The battery cell of claim 27, wherein, The pole body includes a central part and an edge part. The edge part surrounds the central part. The central part includes an inner protruding part that protrudes towards the electrode assembly relative to the edge part, and an outer protruding part that protrudes away from the electrode assembly relative to the edge part. The sealing piece includes a sealing part and a partition part. The sealing part is clamped between the first clamping piece and the edge part. The partition part is arranged on a side of the first clamping piece that is away from the first wall body and is isolated between the inner protruding part and the first clamping piece.

32. The battery cell of claim 1, wherein, The housing is provided with an electrode assembly. The electrode assembly is electrically connected to the pole body through a conductive part. The pole is provided with a receiving groove that is recessed away from the electrode assembly. At least part of the conductive part is received in the receiving groove and is connected to the pole body.

33. The battery cell of any one of claims 1-32, wherein, A pressure relief device is further included. The pressure relief device is arranged in the housing and is located on the same side or a different side of the pole.

34. A battery device, characterized by The battery device includes a plurality of battery cells according to any one of claims 1-33.

35. The battery device of claim 34, wherein, The battery device includes a box body. The battery cells are received in the box body. A bottom of the box body is a box bottom plate. The pole part is arranged on a side of the housing that is close to the box bottom plate or is arranged on a side of the housing that is away from the box bottom plate.

36. An electrical device, comprising: The battery device includes the battery device according to claim 34 or 35.

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