Battery monomer, battery device and electric device

Abstract

The utility model discloses a battery monomer, a battery device and an electric device, and belongs to the technical field of batteries. Wherein the battery monomer comprises a shell, an electrode component and a pole component, the electrode component is arranged in the shell, the shell comprises a first shell wall, the pole component is arranged on the first shell wall and comprises a pole and a clamping structure, the pole is connected with the electrode component, and the clamping structure is connected with the first shell wall; the clamping structure surrounds the pole and is insulated and hermetically matched with the pole through the insulated sealing structure, the clamping structure comprises a first clamping piece and a second clamping piece which are connected, the first clamping piece is bent towards the pole, the first clamping piece and the second clamping piece form a clamping groove for clamping the pole together, the first clamping piece comprises a first clamping part bent towards the pole, and the second clamping piece comprises a second clamping part bent towards the pole. The plurality of first clamping parts are arranged along the circumferential direction of the pole, and a discontinuous opening is formed between at least two adjacent first clamping parts, so that the problems of wrinkles, material stacking and the like after the first clamping parts are bent are favorably solved, and the reliability of the battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery device and an electrical device. Background Art

[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 and important role. Among them, power batteries include several battery cells, however, the reliability of battery cells needs to be improved. Utility Model Content

[0003] The embodiments of the present application provide a battery cell, a battery device and an electrical device, which are beneficial to improving the reliability of the battery cell.

[0004] In a first aspect, an embodiment of the present application provides a battery cell, comprising a shell, an electrode component and a pole component, the electrode component is arranged in the shell, the shell comprises a first shell wall, the pole component is arranged in the first shell wall and comprises a pole and a clamping structure, the pole is connected to the electrode component, the clamping structure is connected to the first shell wall, the clamping structure surrounds the pole and is insulated and sealed with the pole by an insulating sealing structure, the clamping structure comprises a first clamping member and a second clamping member connected and arranged, the first clamping member is bent toward the pole, and forms a clamping groove for clamping the pole together with the second clamping member; wherein the first clamping member comprises a first clamping portion bent toward the pole, the first clamping portion is multiple and arranged along the circumference of the pole, and a discontinuity is formed between at least two adjacent first clamping portions.

[0005] In the above technical solution, since a discontinuity is formed between at least two adjacent first clamping parts, it means that at least two adjacent first clamping parts can extend toward the prefabricated groove used to transform into the discontinuity during the bending process, so that the two first clamping parts can not be stacked on each other, lifted up and wrinkled after bending, but jointly define the discontinuity, thereby improving the redundancy problems such as stacking and wrinkling after the first clamping part is bent. Since the redundancy problems such as stacking and wrinkling caused by the bending of the clamping structure are improved, it is beneficial to improve the reliability of the pole being clamped by the clamping structure, so that the ability of the pole to resist internal and external pressures is enhanced, thereby helping to improve the reliability of the battery cell; and it is not easy to have a gap at the electrical connection position between the pole and the electrode component and / or the busbar component, thereby improving the problems of increased contact resistance, temperature rise, and reduced conductive area caused by the appearance of the gap, thereby helping to improve the operating reliability of the battery cell and ensure the power supply efficiency and power supply demand. In addition, when the first clamping member is located outside the shell and insulating material needs to be coated on the outside of the first clamping member, the redundancy problems such as stacking and wrinkling caused by the bending of the first clamping member are improved, thereby improving the comprehensiveness of the first clamping member being coated with insulating material, thereby reducing the probability of short-circuit connection between the shell and the busbar component, thereby improving the reliability of the battery cell.

[0006] In some embodiments, a plurality of first clamping portions are arranged at intervals along the circumference of the pole, so that a discontinuity is formed between every two adjacent first clamping portions, and a plurality of discontinuities are arranged at intervals along the circumference of the pole.

[0007] In the above technical solution, by providing multiple discontinuities and spacing them along the direction in which the clamping structure surrounds the pole, more space is reserved for the bent first clamping portion to stretch, thereby better solving redundancy problems such as stacking and wrinkles caused by the bending of the clamping structure.

[0008] In some embodiments, the pole is a circular structure, and a plurality of discontinuities are evenly spaced along the circumference of the pole.

[0009] In the above technical solution, since the multiple interruptions are evenly spaced along the circumference of the pole, the multiple first clamping parts can be evenly spaced along the circumference of the pole, so that the multiple first clamping parts can be evenly stressed to more reliably clamp the pole, thereby improving the reliability of the pole being clamped. In addition, the multiple first clamping parts can evenly compress the seal between the clamping structure and the pole, thereby facilitating the sealing between the clamping structure and the pole.

[0010] In some embodiments, the pole is a long strip structure, and the first clamping parts are distributed at both ends of the length and both sides of the width of the pole.

[0011] In the above technical solution, both ends of the long strip pole in the length direction and both sides in the width direction can be clamped by the first clamping parts, so that the multiple first clamping parts can clamp the pole more stably, improving the reliability of the pole being clamped. In addition, the multiple first clamping parts can also make the seal between the clamping structure and the pole be pressed more evenly, which is conducive to ensuring the sealing between the clamping structure and the pole.

[0012] In some embodiments, the pole is a racetrack-shaped structure, which is composed of a rectangle and two arcs located at both ends of the length of the rectangle, and the discontinuity is arranged corresponding to the connection position of the rectangle and the arc.

[0013] In the above technical solution, for the runway-shaped pole, when the first clamping member of the adapter structure surrounding it is bent, the rectangular and arc-shaped connection positions corresponding to the pole are more prone to redundant problems such as piling and wrinkling. By setting the discontinuity here, it is possible to more directly improve the redundant problems such as piling and wrinkling of the first clamping member, and the first clamping parts can be distributed at both ends of the length and both sides of the width of the pole, thereby improving the clamping reliability of the pole.

[0014] In some embodiments, the end of the interrupted opening close to the connection position between the first clamping member and the second clamping member is a closed end, the end of the interrupted opening passing through the first clamping member and away from the above connection position is an open end, and the width of the interrupted opening at the open end position is greater than the width of the interrupted opening at the closed end position.

[0015] In the above technical solution, since the first clamping member is bent toward the pole, the farther away the first clamping member is from the connection position between the first clamping member and the second clamping member, the shorter the circumference is. The position with a shorter circumference is more prone to redundancy problems such as piling and wrinkling. The discontinuity is set to have a relatively large width at the open end, which means that more width space is reserved at the inner circle position with a shorter circumference to absorb the extension of the first clamping part, thereby more reliably improving the redundancy problems such as piling and wrinkling caused by the bending of the first clamping member.

[0016] In some embodiments, the width of the discontinuity gradually increases along a direction from the closed end to the open end.

[0017] In the above technical solution, since the first clamping member is bent toward the pole, the circumference of the first clamping member gradually shortens in the direction away from the connection position between the first clamping member and the second clamping member, and the discontinuity is set to have a width that gradually increases in the direction from the closed end to the open end, so as to be consistent with the trend of the circumference of the first clamping member becoming shorter, so as to more effectively absorb the extension of the first clamping part, thereby more reliably improving the redundancy problems such as stacking and wrinkling caused by the bending of the first clamping member.

[0018] In some embodiments, the first clamping member includes a surrounding portion, which is connected between the first clamping member and the second clamping member. The surrounding portion extends along the inward and outward directions of the first shell wall and extends along the circumference of the pole. The first clamping member and the surrounding portion are integral, and are bent and extended in a direction close to the central axis of the pole relative to the surrounding portion. The interruption starts from the connection between the surrounding portion and the first clamping member and extends in a direction away from the surrounding portion to penetrate the first clamping member.

[0019] In the above technical solution, the first clamping member includes a non-bending surrounding portion, and the non-bending surrounding portion is not provided with a discontinuity, which is beneficial to improve the overall structural strength of the clamping structure and improve the clamping reliability of the clamping structure for the pole.

[0020] In some embodiments, the first clamping portion has a reinforcing rib protruding in a direction away from the pole.

[0021] In the above technical solution, by arranging reinforcing ribs on the first clamping part, the deformation problem of the first clamping part can be improved, the clamping reliability of the pole can be improved, and the pressing reliability of the seal between the clamping structure and the pole can be improved, thereby facilitating ensuring the sealing between the clamping structure and the pole.

[0022] In some embodiments, along the direction in which the first clamping member surrounds the pole, the reinforcing rib is located at the center of the first clamping portion, and the reinforcing rib extends along the bending trajectory of the first clamping portion.

[0023] In the above technical solution, by setting the reinforcing ribs at the central position of the first clamping portion and by setting the reinforcing ribs to extend along the bending trajectory of the first clamping portion, the deformation problem of the first clamping portion can be more effectively improved while the number of reinforcing ribs is relatively small, which is beneficial to reducing material costs and product weight.

[0024] In some embodiments, the first clamping member and the second clamping member are a single piece.

[0025] In the above technical solution, by providing the first clamping member and the second clamping member as an integral member, the assembly steps of the battery cell as a whole can be reduced, and the assembly efficiency of the battery cell can be improved. It is also beneficial to improve the connection reliability between the first clamping member and the second clamping member, and the connection reliability between the clamping structure and the first shell wall. It is also beneficial to improve the sealing and insulation between the clamping structure and the pole.

[0026] In some embodiments, the second clamping member is a preformed member connected to the first shell wall, and the first clamping member is a riveted formed member.

[0027] In the above technical solution, since the second clamping member is a preformed member, the bending during the assembly of the second clamping member and the pole is omitted, thereby reducing the difficulty of assembling the clamping structure and the pole.

[0028] In some embodiments, the second clamping member includes a second clamping portion, the second clamping portion cooperates with the first clamping portion to define a clamping groove, and the second clamping portion has a step structure protruding in a direction away from the first clamping portion.

[0029] In the above technical solution, since the second clamping portion has a step structure protruding in a direction away from the first clamping portion, the structural strength of the second clamping portion can be enhanced, which is beneficial to improving the supporting strength of the second clamping portion on the pole. In this way, when the first clamping member is riveted, the second clamping portion and the first clamping portion can cooperate to reliably clamp the pole and clamp the seal between the clamping structure and the pole, thereby improving the sealing of the matching position between the clamping structure and the pole, and improving the problem of reduced sealing due to deformation of the second clamping portion due to the rebound force of the seal, thereby further improving the sealing of the matching position between the clamping structure and the pole.

[0030] In some embodiments, the clamping structure includes a transition body, the transition body and at least one of the first clamping member and the second clamping member are integrally formed, and the transition body and the first shell wall are integrally formed.

[0031] In the above technical solution, the step of assembling the clamping structure and the first shell wall can be omitted, thereby improving production efficiency.

[0032] In some embodiments, the clamping structure includes a transition body, the transition body is an integral piece with at least one of the first clamping member and the second clamping member, and the transition body is assembled and connected with the first shell wall.

[0033] In the above technical solution, the clamping structure and the first shell wall can be processed separately, which is beneficial to the processing and manufacturing of the battery cell and to meeting the sealing requirements. When the clamping structure and the first shell wall are assembled, the pressure on the first shell wall is reduced, thereby protecting the first shell wall.

[0034] In some embodiments, the first clamping member is disposed on a side of the second clamping member away from the electrode component; the insulating sealing structure includes: a sealing member, at least a portion of which is clamped between the pole and the second clamping member.

[0035] In the above technical solution, the seal can be arranged closer to the electrolyte in the shell, which is conducive to better preventing the electrolyte from penetrating into the matching position of the pole and the clamping structure, and reducing the problem of the electrolyte leaking out of the shell through the matching position of the pole and the clamping structure. In addition, when the pole is a composite pole, the problem of corrosion caused by the electrolyte on the composite position of the pole can be improved.

[0036] In some embodiments, the second clamping member includes a second clamping portion that cooperates with the first clamping portion to form a clamping groove, the second clamping portion includes an end portion and a root portion, the end portion is arranged away from the first shell wall relative to the root portion, and at least a portion of the seal is clamped between the root portion and the pole.

[0037] In the above technical solution, since the second clamping portion is in a cantilever form, the end portion is more easily deformed than the root portion, and at least a portion of the seal is clamped between the root portion of the second clamping portion that is less likely to deform and the pole, which is beneficial to improving the reliability of the seal being clamped, so that the sealing compression amount of the seal can be guaranteed, thereby improving the sealing reliability.

[0038] In some embodiments, the seal is also clamped between the end and the pole at the same time.

[0039] In the above technical solution, the sealing area of ​​the seal is larger and can be closer to the electrolyte in the shell, which is conducive to better preventing the electrolyte from penetrating into the matching position of the pole and the clamping structure, and reducing the problem of the electrolyte leaking out of the shell through the matching position of the pole and the clamping structure.

[0040] In some embodiments, the seal is also clamped between the first clamp and the pole simultaneously, so that at least a portion of the seal is located between the connection position of the first clamp and the second clamp and the pole.

[0041] In the above technical solution, the sealing area of ​​the seal is larger, which can reduce the risk of electrolyte leaking out of the shell along the matching position of the pole and the clamping structure. In addition, when the pole is a composite pole, the setting position of the seal can be more easily close to the material composite surface position of the pole, thereby more effectively improving the problem of corrosion of the pole.

[0042] In some embodiments, the seal is a one-piece piece and further includes a portion clamped between the first clamping portion and the pole.

[0043] In the above technical solution, the sealing area of ​​the seal is larger and the seal is easier to process, which can improve the sealing effect.

[0044] In some embodiments, one of the first clamp and the second clamp is a preformed part, and the other is a riveted part, the preformed part is connected to the first shell wall; the insulating sealing structure includes: a seal, at least part of which is clamped between the pole and the preformed part.

[0045] In the above technical solution, since the shape of the preform does not change substantially before and after riveting, at least part of the seal is clamped between the pole and the preform, and the compression of the seal can be easily controlled, so that the seal has a more reliable sealing effect.

[0046] In some embodiments, the insulating sealing structure includes: an insulating bracket, at least a portion of which is disposed on a side of the second clamping member away from the first clamping member.

[0047] In the above technical solution, by providing an insulating bracket, the battery cell can prevent the short circuit electrical connection between the clamping structure and the electrode component under a use environment such as vibration, thereby improving the reliability of the battery cell.

[0048] In some embodiments, the clamping structure and the first shell wall are an integral piece, and the insulating bracket is an integral piece and further includes a first extension portion extending to the inner side of the first shell wall.

[0049] In the above technical solution, the insulating bracket can also simultaneously prevent the occurrence of short-circuit electrical connection between the first shell wall and the electrode component, thereby further improving the reliability of the battery cell, and can eliminate the need to set other insulating material brackets between the first shell wall and the electrode component, thereby simplifying the structure of the battery cell, reducing costs and improving assembly efficiency.

[0050] In some embodiments, the clamping structure and the first shell wall are separate parts, and the insulating bracket is an integrated part and further includes a second extension portion extending between the second clamping part and the pole.

[0051] In the above technical solution, the insulating bracket can also prevent the second clamping member from short-circuiting the electrical connection with the pole, thereby further improving the reliability of the battery cell, simplifying the structure, reducing parts and reducing costs.

[0052] In some embodiments, the insulating sealing structure includes an insulating bracket, which is an integral piece and includes a portion of the second clamping member on a side away from the first clamping member, and a second extension portion extending between the second clamping member and the pole, the second extension portion being clamped between the end portion and the pole, and having a gap between the second extension portion and the portion of the seal clamped between the root portion and the pole.

[0053] In the above technical solution, the insulating bracket can also prevent the short circuit electrical connection between the second clamping member and the pole, thereby further improving the reliability of the battery cell, simplifying the structure, reducing parts and reducing costs. In addition, the second extension portion reserves space for the seal to be compressed and deformed, so that the compression amount of the seal can meet the requirements.

[0054] In some embodiments, the first clamping member may be disposed on a side of the second clamping member away from the electrode component; the insulating sealing structure comprises: an insulating member, the insulating member comprising an inner insulating portion, at least part of which is clamped between the pole and the first clamping member.

[0055] In the above technical solution, by providing the inner insulating portion, a more reliable insulation effect can be achieved between the pole and the first clamping member.

[0056] In some embodiments, the insulating sealing structure further includes: a sealing member, at least a portion of which is clamped between the pole and the second clamping member, and the hardness of the insulating member is greater than the hardness of the sealing member.

[0057] In the above technical solution, when the first clamping member is bent, since the seal is clamped between the pole and the second clamping member, and the inner insulating part is clamped between the pole and the first clamping member, the bending position can be far away from the seal, thereby making it easy to control the compression amount of the seal and improve the sealing effect.

[0058] In some embodiments, the sealing component and the inner insulating portion are separate components, and a gap is provided between the sealing component and the inner insulating portion.

[0059] In the above technical solution, the setting of the inner insulating part reserves space for the seal to be compressed and deformed, so that the compression amount of the seal can meet the demand. Moreover, since the seal and the insulating part are separate parts and not integrated, when the pole and the clamping structure are assembled, the two can be flexibly arranged according to the actual situation, which reduces the difficulty of assembly and improves the assembly efficiency.

[0060] In some embodiments, the inner insulation is injection molded on the pole.

[0061] In the above technical solution, the inner insulating part is not easily separated from the pole, which can improve the insulation effect and simplify the assembly steps. In addition, the inner insulating part injection-molded on the pole can also shape and restrict the bending deformation of the first clamping member.

[0062] In some embodiments, the insulating member further includes: an outer insulating portion, at least a portion of the outer insulating portion is wrapped outside the first clamping member.

[0063] In the above technical solution, the outer insulating part can be used to isolate the short-circuit electrical connection between the busbar component and the clamping structure, and play an insulating effect between the busbar component and the clamping structure, thereby improving the reliability of the battery device.

[0064] In some embodiments, the inner insulation is connected to the outer insulation.

[0065] In the above technical solution, by arranging the connection between the inner insulating part and the outer insulating part, the risk of the outer insulating part detaching from the clamping structure can be reduced, and the reliability of the insulation of the outer insulating part between the busbar component and the clamping structure can be improved.

[0066] In some embodiments, the inner insulating part is connected to the outer insulating part via a discontinuous opening; and / or a through hole is provided on the first clamping member, and the inner insulating part is connected to the outer insulating part via the through hole.

[0067] In the above technical solution, while satisfying the connection between the inner insulating part and the outer insulating part, no new structural components will be generated due to the connection, and no new parts will be protruding from the clamping structure. This can simplify the structural design and processing, reduce costs, and is conducive to maintaining the first clamping member with a relatively stable structural strength, thereby improving the clamping reliability and sealing reliability.

[0068] In some embodiments, the inner insulating part and the outer insulating part are an integral piece, or the inner insulating part and the outer insulating part are separately formed and assembled and connected.

[0069] In the above technical solution, the insulating parts can be flexibly processed according to different requirements.

[0070] In some embodiments, the first clamping member is disposed on a side of the second clamping member away from the electrode component; the insulating sealing structure includes: an insulating member, the insulating member includes an outer insulating portion, at least a portion of the outer insulating portion is externally wrapped outside the first clamping member.

[0071] In the above technical solution, the outer insulating part can be used to isolate the short-circuit electrical connection between the current collecting component and the clamping structure, and play an insulating effect between the current collecting component and the clamping structure, thereby improving the reliability of the battery device. In addition, the provision of the outer insulating part can play a filling effect, filling the folds or stacked positions of the first clamping member, so as to play a more reliable insulation effect between the clamping structure and the current collecting component.

[0072] In some embodiments, a surface of the outer insulating portion on one side away from the electrode component is lower than or flush with a surface of the pole on one side away from the electrode component.

[0073] In the above technical solution, the outer insulating part wrapped outside the first clamping member will not lift up a part of the busbar component connected to the pole, thereby improving the connection reliability and connection stability between the busbar component and the pole.

[0074] In some embodiments, the outer insulating portion includes an embedded portion sandwiched between an outer circumferential surface of the pole and an inner circumferential surface of the first clamping member.

[0075] In the above technical solution, the embedded portion is provided to enhance the gripping force, improve the matching reliability and stability between the outer insulating portion and the clamping structure, and improve the reliability of the insulation between the clamping structure and the current collecting component.

[0076] In some embodiments, the outer insulating portion further fills the discontinuity.

[0077] In the above technical solution, the provision of the outer insulating part can achieve a more effective filling effect, which can not only fill the wrinkled or stacked positions of the first clamping member, but also fill the missing pit positions of the first clamping member.

[0078] In some embodiments, the pole component further includes a reinforcing sheet, which is disposed between the first clamping member and a portion of the insulating sealing structure clamped between the first clamping member and the pole, and is bent into a shape matching the first clamping member.

[0079] In the above technical solution, by providing a reinforcing sheet, the reinforcing sheet can be used to strengthen the structure, thereby improving the strength of the first clamping member, so that the clamping structure can clamp the pole more reliably and improve the sealing insulation between the clamping structure and the pole.

[0080] In some embodiments, the pole includes a first metal part and a second metal part of different materials, the first metal part is located on the side of the second metal part away from the electrode component, the second metal part is connected to the electrode component, and the periphery of the first metal part and the periphery of the second metal part adjacent to the first metal part are both covered with a protective metal layer.

[0081] In the above technical solution, the provision of a protective metal layer is helpful in solving the problem of electrode corrosion caused by accidental penetration of the electrolyte into the joint surface between the first metal part and the second metal part.

[0082] In some embodiments, the insulating sealing structure includes: an insulating bracket, at least a portion of which is arranged on a side of the clamping structure close to the electrode component, the pole includes an inner protrusion located in an inner ring area of ​​the insulating bracket, the inner protrusion protrudes toward the electrode component relative to the clamping structure, and a surface on one side of the inner protrusion close to the electrode component is flush with a surface on one side of the insulating bracket close to the electrode component.

[0083] In the above technical solution, the pole can be relatively close to the electrode component, which facilitates the connection operation between the electrode component and the pole.

[0084] In some embodiments, the pole component defines a receiving groove that is recessed in a direction away from the electrode component, and the pole defines a groove end wall on the side of the receiving groove away from the electrode component. The electrode component is electrically connected to the pole through a conductive portion, and at least a portion of the conductive portion is received in the receiving groove and connected to the groove end wall.

[0085] In the above technical solution, since at least part of the conductive part is received in the receiving groove defined by the pole component, the space occupied by the conductive part in the shell can be reduced, so that more space can be saved in the shell to accommodate electrode components, electrolyte or gas production, etc., thereby improving the energy density or reliability of the battery cell.

[0086] In some embodiments, the battery cell further includes a pressure relief device, which is disposed on the housing and is located on the same side or on the opposite side as the pole component.

[0087] In the above technical solution, by providing a pressure relief device, when the pressure in the shell exceeds a preset value, the pressure can be released directionally through the pressure relief device, thereby improving the reliability of the battery cell.

[0088] In a second aspect, an embodiment of the present application further provides a battery device, comprising a battery cell of any of the above solutions.

[0089] In the above technical solution, since the reliability of the battery cell according to the embodiment of the present application is improved, it is beneficial to improve the performance of the battery device.

[0090] In some embodiments, the battery device includes a box body, a plurality of battery cells are accommodated in the box body, the bottom of the box body is the box body bottom plate, and the pole component is arranged on a side of the shell body close to the box body bottom plate, or on a side of the shell body away from the box body bottom plate.

[0091] In the above technical solution, the relative position of the pole component and the bottom plate of the box is not limited, and the orientation of the battery cell and the box can be flexibly set. Among them, when the pole component of the battery cell is set on the side of the shell facing the bottom plate of the box, the battery cell is in an inverted state, and the decompression product is sprayed away from the passenger compartment, which is safer; when the pole component of the battery cell is set on the side of the shell away from the bottom plate of the box, the battery cell is in an upright state, and the electrolyte is not easy to leak.

[0092] In a third aspect, an embodiment of the present application further provides an electrical device, comprising a battery device according to any of the above solutions.

[0093] In the above technical solution, since the performance of the battery device is improved, it is beneficial to improve the working power performance of the power-consuming device. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0095] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0096] Figure 2 An exploded view of a battery device provided in some embodiments of the present application;

[0097] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0098] Figure 4A partial cross-sectional view of a battery cell provided for some embodiments of the present application;

[0099] Figure 5 A cross-sectional view of a pole component provided in some embodiments of the present application;

[0100] Figure 6 for Figure 5 A partial enlarged view of the A part shown in ;

[0101] Figure 7 A three-dimensional diagram of a pole component provided for some embodiments of the present application;

[0102] Figure 8 for Figure 7 A schematic diagram of the clamping structure shown in ;

[0103] Fig. 9 A schematic diagram of a clamping structure provided in some embodiments of the present application before being assembled;

[0104] Fig.10 for Fig. 9 An orthographic view of the clamping structure shown in ;

[0105] Fig.11 A schematic diagram of a pole body provided for some embodiments of the present application;

[0106] Fig.12 for Fig.11 The pole body shown in FIG. participates in an exploded view of the assembled pole components;

[0107] Fig.13 for Fig.12 A schematic diagram of the assembled state of the pole component shown in FIG.

[0108] Fig.14 for Fig.13 A partial enlarged view of part B shown in FIG.

[0109] Fig.15 An orthographic projection view of a pole component provided for some embodiments of the present application;

[0110] Fig.16 A three-dimensional diagram of a pole component provided for some embodiments of the present application;

[0111] Fig.17 for Fig.16 A schematic diagram of the clamping structure shown in ;

[0112] Fig.18 A partial cross-sectional view of a battery cell provided for some embodiments of the present application;

[0113] Fig.19 A partial cross-sectional view of a battery cell provided for some embodiments of the present application;

[0114] Fig. 20 An intermediate state diagram of the assembly of a battery cell provided in some embodiments of the present application;

[0115] Fig.21 for Fig. 20 A partial cross-sectional view of a battery cell after assembly shown in FIG.

[0116] Fig. 22 A partial cross-sectional view of a battery cell provided for some embodiments of the present application;

[0117] Fig.23 A partial cross-sectional view of a battery cell provided for some embodiments of the present application;

[0118] Fig.24 for Fig.23 A partial enlarged view of the C portion shown in ;

[0119] Fig.25 A partial cross-sectional view of a battery cell provided for some embodiments of the present application;

[0120] Fig.26 A cross-sectional view of a pole component provided in some embodiments of the present application;

[0121] Fig. 27 A cross-sectional view of a pole component provided in some embodiments of the present application;

[0122] Fig.28 An orthographic projection diagram of a pole component provided in some embodiments of the present application as viewed from the outside;

[0123] Fig.29 A partial cross-sectional view of a pole component provided in some embodiments of the present application;

[0124] Fig.30 A schematic diagram of the cooperation between a pole component and a press-fit fixture provided in some embodiments of the present application;

[0125] Fig.31 A schematic diagram of a pole ear portion provided for some embodiments of the present application.

[0126] Reference numerals:

[0127] Vehicles 1000;

[0128] Battery device 100; controller 200; motor 300;

[0129] Box body 101; first box part 1011; second box part 1012; box body bottom plate 1013;

[0130] Battery cell 102; first direction F1; second direction F2; third direction F3;

[0131] Shell 1; first shell wall 111; mounting hole 112; accommodating cavity 13;

[0132] Pole component 2;

[0133] Pole 21; first metal portion 211; second metal portion 212;

[0134] Protective metal layer 213; inner convex portion 214; groove end wall 215;

[0135] Clamping structure 22;

[0136] First clamping member 221; first clamping portion 2211; reinforcing rib 22111;

[0137] Surrounding portion 2212; interrupted opening 2213; closed end a1; open end a2;

[0138] Prefabricated groove 2214; through hole 2215;

[0139] A second clamping member 222;

[0140] Second clamping portion 2221; end portion 22211; root portion 22212;

[0141] Adaptation body 2222; clamping groove 223;

[0142] Insulation sealing structure 23;

[0143] Sealing member 231; first sealing portion 2311; second sealing portion 2312; third sealing portion 2313;

[0144] Insulating bracket 232; first extension portion 2324; second extension portion 2325;

[0145] Insulating member 233; inner insulating portion 2331; outer insulating portion 2332; inner embedded portion 23321;

[0146] Reinforcing sheet 24; Accommodating groove 25;

[0147] Electrode component 3; active material coating portion 32; pole ear portion 33;

[0148] Conductive part 4; conductive member 41; pressure relief device 5; press-fitting fixture 6;

[0149] The central axis of the pole L; ultrasonic weld mark M; laser weld seam N;

[0150] A surface S1 of the inner convex portion close to the electrode component;

[0151] The insulating support has a side surface S2 close to the electrode component. DETAILED DESCRIPTION

[0152] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0153] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0154] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0155] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0156] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0157] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0158] The term "plurality" used in the present application refers to more than two, including two.

[0159] In the present application, the battery cell may 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., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, rectangular or in other shapes, etc., and the embodiments of the present application do not limit this.

[0160] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery device may include a box for encapsulating one or more battery cells, or one or more battery modules, and the box may prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0161] A battery cell includes a housing, an electrode component and an electrolyte (in a solid-state battery, it may be a solid electrolyte layer located between the positive and negative electrodes). The electrode component includes at least one electrode assembly. The electrode assembly and the electrolyte are both contained in the housing. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator (this structure may be omitted in a solid-state battery). A battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet.

[0162] The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab sheet. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.

[0163] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc.

[0164] The material of the isolation film can be PP, polypropylene or PE, polyethylene, etc. The electrode assembly mentioned in the embodiment of the present application is a winding or laminated structure.

[0165] In the battery cell of the related art, a pole is arranged on the shell, and the pole is electrically connected to the electrode component in the shell on the one hand, and is electrically connected to the busbar component outside the shell on the other hand, so that the busbar component can realize the connection of multiple battery cells in the battery device, wherein the busbar component is also called a busbar, which meets the electrical connection requirements between multiple battery cells. In order to achieve the fixation of the pole, a clamping structure for clamping the pole can be arranged on the shell, and the clamping structure is annular to surround the pole and clamp the edge of the pole, so that the annular clamping structure can expose the partial inner surface of the pole to meet the requirements of the electrical connection between the pole and the electrode component in the shell, and the annular clamping structure can expose the partial outer surface of the pole to meet the requirements of the electrical connection between the pole and the busbar component outside the shell.

[0166] Among them, the clamping structure can clamp and fix the pole by riveting. However, since the annular circumference of the riveted flange formed after the clamping structure is riveted and bent is smaller than the annular circumference before riveting, the riveted flange formed has redundancy problems such as stacking and wrinkles.

[0167] On the one hand, due to the redundancy problems such as stacking and wrinkling of the riveted flanges of the clamping structure, some parts of the pole cannot be reliably clamped by the riveted flanges, thus affecting the reliability of the fixation of the pole. Once there is a reliability problem in the fixation of the pole, a gap will appear at the electrical connection position between the pole and the electrode component and / or the busbar component, which will increase the contact resistance and generate additional heat when the current passes through, which will not only cause energy loss, but may also increase the local temperature, affecting the normal operation efficiency of the battery cell, and if it is in a poor contact state for a long time, the heating phenomenon of the battery cell will continue to intensify, affecting the reliability of the battery cell. In addition, when a gap appears at the electrical connection position between the pole and the electrode component and / or the busbar component, the conductive area will be reduced, the conductive performance will be reduced, and the current flow capacity will be limited. For high current loads, it may not be able to meet the normal power supply requirements.

[0168] On the other hand, in order to avoid the shell from being short-circuited with the collector through the clamping structure, insulating glue can be wrapped around the outside of the clamping structure. However, due to the redundancy of stacking and wrinkling of the riveted flange of the clamping structure, the stacked protruding position may not be completely covered by the insulating glue, resulting in the possibility that part of the clamping structure may be exposed and in contact with the collector to conduct electricity. Since the collector usually carries a large current, once it contacts the shell, it is easy to form a short circuit. A large amount of heat will be generated at the moment of the short circuit, causing the temperature and pressure inside the battery cell to rise rapidly, thereby affecting the reliability of the battery cell.

[0169] In view of this, the present application proposes a battery cell, which includes a shell, an electrode component and a pole component, the electrode component is arranged in the shell, the shell includes a first shell wall, the pole component is arranged on the first shell wall, the pole component includes: a pole and a clamping structure, the pole is connected to the electrode component, the clamping structure is connected to the first shell wall, the clamping structure surrounds the pole and is insulated and sealed with the pole through an insulating sealing structure, the clamping structure includes a first clamping member and a second clamping member that are connected and arranged, the first clamping member is bent toward the pole, and forms a clamping groove for clamping the pole together with the second clamping member, wherein the first clamping member includes a first clamping portion bent toward the pole, the first clamping portion is multiple and arranged along the circumference of the pole, and a discontinuity is formed between at least two adjacent first clamping portions, that is, the two adjacent first clamping portions are disconnected and not connected at the discontinuity.

[0170] In this way, due to the formation of the discontinuous opening, it is helpful to improve the redundancy problems such as stacking and wrinkling after the clamping structure is bent, thereby helping to improve the problem that some parts of the pole cannot be reliably clamped due to the local stacking and wrinkling of the clamping structure, thereby improving the reliability of the fixation of the pole. In addition, by improving the redundancy problems such as stacking and wrinkling after the clamping structure is bent, when the bent part of the clamping structure is outside the shell and the bent part of the clamping structure needs to be coated with insulating glue, it is helpful to completely coat the bent part of the clamping structure, thereby helping to improve the insulation effect of the collector component and the clamping structure, thereby reducing the probability of short circuit between the collector component and the shell, and thus helping to improve the reliability of the battery cell.

[0171] The technical solutions described in the embodiments of the present application are applicable to battery cells, battery devices including battery cells, and electrical devices using the battery devices.

[0172] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0173] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0174] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery device 100, and the battery device 100 can be provided at a position such as the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000.

[0175] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0176] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0177] Please refer to Figure 2 , Figure 2 The exploded view of the battery device 100 provided in some embodiments of the present application includes a battery cell 102 and a box 101 for accommodating the battery cell 102. The box 101 can be in various structural forms.

[0178] In some embodiments, the box body 101 may include a first box portion 1011 and a second box portion 1012, the first box portion 1011 and the second box portion 1012 cover each other, and the first box portion 1011 and the second box portion 1012 jointly define an accommodation space for accommodating the battery cell 102. A sealing member may also be provided at the connection position between the first box portion 1011 and the second box portion 1012 to achieve a sealed connection between the first box portion 1011 and the second box portion 1012.

[0179] For example, refer to Figure 2 , the first box part 1011 and the second box part 1012 can both be hollow structures with one side open, and the open side of the first box part 1011 covers the open side of the second box part 1012, thereby forming a box body 101 with a storage space. 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 body 101 can be in various shapes, such as a cylindrical box body, a rectangular box body, etc.

[0180] In the battery device 100, there may be one or more battery cells 102. If there are more than one battery cell 102, the battery cells 102 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the battery cells 102 are connected in series and in parallel. The battery cells 102 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the battery cells 102 may be accommodated in the box 101. Of course, the battery cells 102 may be connected in series, in parallel, or in a mixed connection to form a battery module, and then the battery modules may be connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 101. In some embodiments, the battery cells 102 may be electrically connected through a busbar component to achieve parallel, series, or mixed connection of the battery cells 102.

[0181] Please refer to Figure 3 , Figure 3 The schematic diagram of the structure of the battery cell 102 provided in some embodiments of the present application. The battery cell 102 is in the form of a rectangular parallelepiped, 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, the width direction of the battery cell 102 is the third direction F3, and 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 of the embodiment of the present application can also be cylindrical or in other shapes, and the battery cell 102 can be a hard shell battery or a soft pack battery, etc.

[0182] Please refer to Figure 3 and Figure 4 , Figure 4 A partial cross-sectional view of a battery cell 102 provided in some embodiments of the present application. In some embodiments of the present application, the battery cell 102 includes a shell 1, an electrode component 3 and a pole component 2, the electrode component 3 is arranged in the shell 1, the shell 1 includes a first shell wall 111, and the pole component 2 is arranged in the first shell wall 111. The pole component 2 includes a pole 21, a clamping structure 22 and an insulating sealing structure 23. The pole 21 is connected to the electrode component 3, the clamping structure 22 is connected to the first shell wall 111, the clamping structure 22 clamps the pole 21, and the clamping structure 22 and the pole 21 are insulated and sealed by the insulating sealing structure 23.

[0183] For example, refer to Figure 3 and Figure 4 The housing 1 has a receiving chamber 13, and the electrode component 3 includes: an active material coating portion 32 and a pole ear portion 33. The active material coating portion 32 is received in the receiving chamber 13, and the pole ear portion 33 is connected to the active material coating portion 32. The electrode component 3 includes one or more electrode assemblies (the electrode assembly can be in a winding form or a laminated form), and the portion of the current collector in the electrode assembly coated with the active material layer constitutes the active material coating portion 32, and the portion not coated with the active material layer constitutes the pole ear portion 33, and the pole ear portion 33 includes multiple layers of pole ear sheets.

[0184] For example, refer to Figure 3 and Figure 4 The pole component 2 and the first shell wall 111 are located on the same side of the electrode component 3, that is, the pole component 2 is arranged on the side where the first shell wall 111 is located, so that the pole component 2 is arranged on the first shell wall 111. For example, when the first shell wall 111 is located above the electrode component 3, the pole component 2 is also located above the electrode component 3; when the first shell wall 111 is located below the electrode component 3, the pole component 2 is also located below the electrode component 3; when the first shell wall 111 is located on the side of the electrode component 3, the pole component 2 is also located on the same side of the electrode component 3.

[0185] The pole component 2 is connected to the first shell wall 111 via a clamping structure 22, wherein the connection method between the clamping structure 22 and the first shell wall 111 is not limited, for example, the two can be an integral part (i.e., integrally formed), or the two can also be separate parts and assembled and connected, such as welding, riveting, etc.

[0186] For example, refer to Figure 3 and Figure 4 In order to realize the connection between the pole 21 and the electrode component 3, the active material coating part 32 can be connected to the pole 21 through the conductive part 4 to form electrical conduction. The connection method between the conductive part 4 and the pole 21 is not limited, for example, it can include, but is not limited to, ultrasonic welding, ultrasonic pre-welding combined with laser welding, resistance welding, pressure melting welding, brazing, bonding, etc. In the present application, the pole 21 can be used for the positive pole to connect with the positive electrode component 3, and can also be used for the negative pole to connect with the negative electrode component 3.

[0187] For example, refer to Figure 4 , the conductive part 4 may include the pole ear part 33 and the conductive member 41 connected to the pole ear part 33 at the same time, and the pole ear part 33 is indirectly connected to the pole post 21 through the conductive member 41. Therefore, by indirectly connecting the pole ear part 33 and the pole post 21 through the conductive member 41, the length of the pole ear part 33 can be shortened, and the problems of wrinkling, bending and breaking of the pole ear sheet can be improved. Moreover, the shape and material of the conductive member 41 can be flexibly designed to reduce the difficulty of connection with the pole post 21 and improve the convenience of connection between the conductive member 41 and the pole post 21. Alternatively, in other embodiments, the conductive part 4 may also include only the pole ear part 33, and be directly connected to the pole post 21 through the pole ear part 33, so that the use of the conductive member 41 can be omitted, and the connection process of the conductive member 41 and the pole ear part 33 can be omitted.

[0188] For example, refer to Figure 3 and Figure 4At least part of the insulating sealing structure 23 is disposed between the portion of the clamping structure 22 for clamping the pole 21 and the portion of the pole 21 clamped by the clamping structure 22, so that when the clamping structure 22 is connected to the first shell wall 111, the insulation requirements of the pole 21 and the shell 1 can be met, and the sealing requirements at the installation of the pole 21 can be met. Among them, the material of the insulating sealing structure 23 can be flexibly selected, as long as it meets the corresponding required insulation and / or sealing functions at the required position, and some embodiments will be introduced as examples later.

[0189] Please refer to Figure 5-Figure 8 , Figure 5 A cross-sectional view of a pole component provided in some embodiments of the present application; Figure 6 for Figure 5 A partial enlarged view of the A part shown in ; Figure 7 A three-dimensional diagram of a pole component provided for some embodiments of the present application; Figure 8 for Figure 7 In some embodiments of the present application, in order to realize that the clamping structure 22 clamps the pole 21, the clamping structure 22 is arranged around the pole 21, and the clamping structure 22 includes a first clamping member 221 and a second clamping member 222 that are connected and arranged, and the clamping structure 22 clamps the pole 21 through the first clamping member 221 and the second clamping member 222.

[0190] The clamping structure 22 is arranged around the pole 21, which can be understood as: the clamping structure 22 surrounds the pole 21 along the extension direction of the cross-sectional contour line of the pole 21. The cross-sectional area of ​​the pole 21 refers to: the cross-sectional area obtained by cutting the pole 21 with a plane perpendicular to the central axis L of the pole 21. For example, when the cross-sectional area of ​​the pole 21 is circular, the pole 21 is a circular pole, and the cross-sectional contour line of the pole 21 is circular; for another example, when the cross-sectional area of ​​the pole 21 is runway-shaped, the pole 21 is a runway-shaped pole, and the cross-sectional contour line of the pole 21 is runway-shaped. Of course, the cross-sectional area of ​​the pole 21 is not limited to a circle or a runway shape, and the cross-sectional area of ​​the pole 21 can also be other shapes, such as a rectangle, an ellipse, and the like.

[0191] Therefore, by setting the clamping structure 22 to surround the pole 21, the clamping structure 22 can clamp the pole 21 only at the edge of the pole 21 without blocking the surface of the pole 21 used for connecting to the electrode component 3, nor blocking the surface of the pole 21 used for connecting to the bus component, thereby enabling the pole 21 to be connected to the electrode component 3 and the bus component respectively.

[0192] Among them, the connection and setting manner of the first clamping member 221 and the second clamping member 222 is not limited. For example, the first clamping member 221 and the second clamping member 222 can be directly connected or indirectly connected; for example, the first clamping member 221 and the second clamping member 222 can be separate parts and assembled and connected (such as welding, bonding, riveting, etc.), or the first clamping member 221 and the second clamping member 222 can be processed into an integral part by one-piece molding to achieve a natural connection between the two.

[0193] Please refer again Figure 5-Figure 8 In the embodiment of the present application, the first clamping member 221 is bent toward the pole 21, and forms a clamping groove 223 for clamping the pole 21 together with the second clamping member 222. The first clamping member 221 includes a first clamping portion 2211 bent toward the pole 21. The first clamping portions 2211 are multiple and arranged along the circumference of the pole 21, and a discontinuity 2213 is formed between at least two adjacent first clamping portions 2211. That is, after being bent, the two adjacent first clamping portions 2211 can be separated at the discontinuity 2213, with a gap therebetween.

[0194] Among them, the size of the interruption 2213 is not limited. For example, it can be just a gap form, so that there is no obvious gap between the two adjacent first clamping parts 2211 at the interruption 2213. For example, the interruption 2213 can also be a notch form with a certain width, so that there is an obvious gap between the two adjacent first clamping parts 2211 at the interruption 2213.

[0195] In this way, the first clamping member 221 can define a clamping groove 223 together with the second clamping member 222 through the first clamping portion 2211 bent toward the pole 21 , and the edge of the pole 21 is clamped in the clamping groove 223 , thereby achieving clamping and fixing of the pole 21 by the clamping structure 22 .

[0196] The first clamping portion 2211 is bent toward the pole 21, which can be understood as: the first clamping portion 2211 is bent and extended toward the direction close to the central axis L of the pole 21. The plurality of first clamping portions 2211 are arranged along the circumference of the pole 21, which can be understood as: the plurality of first clamping portions 2211 are arranged in sequence along the direction in which the clamping structure 22 surrounds the pole 21. For example, when the pole 21 is a circular pole, the plurality of first clamping portions 2211 are arranged in sequence along a circular trajectory. For another example, when the pole 21 is a racetrack-shaped pole, the plurality of first clamping portions 2211 are arranged in sequence along a racetrack-shaped trajectory. The shape of the pole 21 refers to: the cross-sectional shape of the pole 21.

[0197] Among them, there are at least two first clamping parts 2211, but the number is not limited. In addition to the position where the discontinuity 2213 is formed, the ends of two adjacent first clamping parts 2211 close to each other can be spaced or not spaced, and can be connected at the position without spacing. For example, when the first clamping member 221 only includes two first clamping parts 2211, the ends of one side of the two first clamping parts 2211 close to each other are connected, and the discontinuity 2213 is formed between the ends of the other side of the two first clamping parts 2211 close to each other. At this time, only one discontinuity 2213 is formed on the first clamping part 2211. For another example, when the first clamping member 221 only includes two first clamping parts 2211, the discontinuity 2213 is formed between the ends of one side of the two first clamping parts 2211 close to each other, and the discontinuity 2213 is also formed between the ends of the other side of the two first clamping parts 2211 close to each other. At this time, two discontinuity 2213 are formed on the first clamping part 2211.

[0198] Please combine Figure 9-Figure 14 , Fig. 9 A schematic diagram of a clamping structure 22 provided in some embodiments of the present application before being assembled; Fig.10 for Fig. 9 An orthographic view of the clamping structure 22 shown in FIG. Figure 11-13 This is a diagram of the assembly process of the pole component 2 provided in some embodiments of the present application. Fig.14 for Fig.13 2 is a partial enlarged view of the B portion shown in FIG. 4. For example, the first clamping member 221 may be in a straight state (for example, Fig. 9 As shown), a plurality of prefabricated grooves 2214 are provided on the first clamping member 221. The prefabricated grooves 2214 are formed by the first clamping member 221 being recessed in a direction toward the second clamping member 222 at one end away from the second clamping member 222. Figure 7 and Figure 8 After the first clamping member 221 is bent, the first clamping portion 2211 extends toward the pole 21 , and a clamping groove 223 is formed between the first clamping member 221 and the second clamping member 222 to clamp the pole 21 .

[0199] After the first clamping member 221 is bent, due to the deformation of the first clamping portion 2211, the prefabricated groove 2214 is transformed into a discontinuous opening 2213 interrupted between two adjacent first clamping portions 2211, and the discontinuous opening 2213 passes through the end of the first clamping member 221 away from the connection position between the first clamping member 221 and the second clamping member 222, and the discontinuous opening 2213 passes through the wall thickness of the first clamping member 221.

[0200] Before the first clamping member 221 is bent, the circumference of each position of the first clamping member 221 is consistent, and after being bent toward the pole 21, the circumference of the first clamping member 221 is smaller as it approaches the central axis L of the pole 21, that is, after being bent, the multiple first clamping portions 2211 need to be closer, and the prefabricated groove 2214 is provided to absorb the mutual approach of the first clamping portions 2211, so that the two first clamping portions 2211 on both sides of the prefabricated groove 2214 are not stacked or arched, that is, during the bending process, the two first clamping portions 2211 on both sides of the prefabricated groove 2214 can extend and approach toward the direction of the prefabricated groove 2214, so that the prefabricated groove 2214 is reduced and finally becomes a discontinuous opening 2213, so that the circumference shortening phenomenon caused by the bending of the first clamping member 221 can be effectively adapted to, without forming stacking or redundancy of wrinkles. Among them, the circumference of the first clamping member 221 refers to: the length of the first clamping member 221 along the direction of surrounding the pole 21.

[0201] According to the different widths of the prefabricated grooves 2214, the sizes of the formed discontinuities 2213 are different, that is, the discontinuities 2213 allow the gap between two adjacent first clamping parts 2211 to be specifically set according to actual conditions. For example, the discontinuities 2213 may be in the form of a slit, so that there is no obvious gap between two adjacent first clamping parts 2211 at the discontinuities 2213. For another example, the discontinuities 2213 may be in the form of a notch with a certain width, so that there is an obvious gap between two adjacent first clamping parts 2211 at the discontinuities 2213.

[0202] In the above technical solution, since a discontinuous opening 2213 is formed between at least two adjacent first clamping portions 2211, it means that at least two adjacent first clamping portions 2211 can extend toward the prefabricated groove 2214 used to transform into the discontinuous opening 2213 during the bending process, so that the two first clamping portions 2211 can be separated at the mouth of the discontinuous opening 2213 after bending (that is, there is a gap between them), and they are not stacked on each other or wrinkled, thereby improving the redundancy problems such as stacking and wrinkling after the first clamping member 221 is bent.

[0203] In this way, the redundancy problems such as stacking and wrinkling caused by the bending of the clamping structure 22 are improved, which is beneficial to improving the reliability of the pole 21 being clamped by the clamping structure 22, so that the ability of the pole 21 to resist internal and external pressures is enhanced, which is beneficial to improving the reliability of the battery cell 102; and it is less likely to have a gap at the electrical connection position between the pole 21 and the electrode component 3 and / or the busbar component, thereby improving the problems of increased contact resistance, temperature rise, and reduced conductive area caused by the appearance of the gap, which is beneficial to improving the operating reliability of the battery cell 102 and ensuring the power supply efficiency and power supply requirements.

[0204] In addition, when the first clamping member 221 is located outside the housing 1 and an insulating material needs to be coated outside the first clamping member 221, the redundancy problems such as stacking and wrinkling caused by the bending of the first clamping member 221 are improved, thereby improving the comprehensiveness of the first clamping member 221 being coated with the insulating material, thereby reducing the probability of a short circuit connection between the housing 1 and the busbar component, thereby improving the reliability of the battery cell 102. Of course, the present application is not limited to this, and in other embodiments of the present application, the first clamping member 221 can also be arranged inside the housing 1 and the second clamping member 222 can be arranged outside the housing 1 as needed.

[0205] Please refer again Figure 7 and Figure 8 In some embodiments of the present application, a plurality of first clamping portions 2211 are arranged at intervals along the circumference of the pole 21, so that a discontinuity 2213 is formed between each two adjacent first clamping portions 2211, and a first clamping portion 2211 is formed between two adjacent discontinuities 2213, and a plurality of discontinuities 2213 are arranged at intervals along the circumference of the pole 21. Thus, by arranging a plurality of discontinuities 2213 and arranging them at intervals along the direction in which the clamping structure 22 surrounds the pole 21, more space is reserved to allow the bent first clamping portion 2211 to stretch, thereby better solving the redundancy problems such as stacking and wrinkles caused by the bending of the clamping structure 22.

[0206] Among them, the position selection of the discontinuous opening 2213 can be specifically designed according to the shape of the pole 21. On the one hand, a position where piles and wrinkles are likely to occur after the first clamping member 221 is bent can be selected. On the other hand, the distribution of the multiple first clamping parts 2211 should also meet the requirement that the pole 21 can be reliably clamped. On the other hand, the insulating sealing structure 23 may include a sealing member 231 disposed between the clamping structure 22 and the pole 21. When selecting the setting position of the discontinuous opening 2213, the multiple first clamping parts 2211 should also meet the requirement that the sealing member 231 can be uniformly pressed to ensure the sealing between the clamping structure 22 and the pole 21.

[0207] In some embodiments of this application, please refer to Fig.15 , Fig.15The front projection view of the pole component provided in some embodiments of the present application, the pole 21 is a circular structure (i.e., the cross section of the pole 21 is circular), and a plurality of interruptions 2213 are evenly spaced along the circumference (i.e., circular trajectory) of the pole 21. That is, the circumferential spacing between each two adjacent interruptions 2213 is equal, so that the plurality of first clamping portions 2211 can be evenly spaced along the circumference of the pole 21, so that the plurality of first clamping portions 2211 can be evenly stressed to more reliably clamp the pole 21, improve the reliability of the pole 21 being clamped, and help ensure the pressure resistance of the pole 21. Moreover, the plurality of first clamping portions 2211 can also make the seal 231 between the clamping structure 22 and the pole 21 be evenly compressed, so as to help ensure the sealing between the clamping structure 22 and the pole 21.

[0208] In some other embodiments of this application, please refer to Figure 7 and Figure 8 The pole 21 is a long strip structure (i.e., the cross section of the pole 21 is a long strip, such as a rectangle, an ellipse, a racetrack, etc.), and the pole 21 has first clamping portions 2211 distributed on both ends of the length (i.e., the two ends in the length direction F4 of the pole 21) and both sides of the width (i.e., the two sides in the width direction F5 of the pole 21). It is worth noting that one or more first clamping portions 2211 spaced apart along the length direction of the pole 21 may be distributed on any side in the width direction of the pole 21, and one or more first clamping portions 2211 spaced apart along the width direction of the pole 21 may be distributed on any end in the length direction of the pole 21.

[0209] Thus, both ends of the long strip pole 21 in the length direction and both sides in the width direction can be clamped by the first clamping parts 2211, so that the plurality of first clamping parts 2211 can clamp the pole 21 more stably, improve the reliability of the pole 21 being clamped, and help to ensure the pressure resistance of the pole 21. In addition, the plurality of first clamping parts 2211 can also make the seal 231 between the clamping structure 22 and the pole 21 be pressed more evenly, so as to help to ensure the sealing between the clamping structure 22 and the pole 21.

[0210] Please refer to Figure 7 and Figure 8 In some embodiments of the present application, the pole 21 is a runway-shaped structure, and the runway shape is composed of a rectangle and two arcs located at the two ends of the length of the rectangle, and the discontinuity 2213 is arranged corresponding to the connection position of the rectangle and the arc. It is worth noting that there are four connection positions of the runway-shaped rectangle and the arc, and at least one of the four positions may be provided with a discontinuity 2213. Exemplarily, the two diagonal positions of the four positions are correspondingly provided with a discontinuity 2213. Again exemplarily, each of the four positions is correspondingly provided with a discontinuity 2213 (for example Figure 7 as shown).

[0211] Therefore, for the runway-shaped pole 21, when the first clamping piece 221 of the adapter structure 22 surrounding it is bent, the rectangular and arc-shaped connection positions corresponding to the pole 21 are more prone to redundancy problems such as piling and wrinkling. Setting the discontinuity 2213 here can more directly improve the redundancy problems such as piling and wrinkling of the first clamping piece 221, and the first clamping parts 2211 can be distributed at both ends of the length and both sides of the width of the pole 21, thereby improving the clamping reliability of the pole 21.

[0212] For example, in combination Figure 6-Figure 8 The pole 21 is a runway-shaped structure, and the first clamping member 221 includes four interruptions 2213 and four first clamping portions 2211. A corresponding interruption 2213 is set at each of the four vertices of the runway-shaped rectangle, so that a first clamping portion 2211 is provided at each of the two ends of the length of the pole 21 (i.e., the two ends in the length direction F4), and a first clamping portion 2211 is also provided at each of the two sides of the width of the pole 21 (i.e., the two sides in the width direction F5). Therefore, the four first clamping portions 2211 can clamp the pole 21 more stably, improve the reliability of the pole 21 being clamped, and help to ensure the pressure resistance of the pole 21. In addition, the four first clamping portions 2211 can also make the seal 231 between the clamping structure 22 and the pole 21 be pressed more evenly, so as to help to ensure the sealing between the clamping structure 22 and the pole 21.

[0213] Please refer to Figure 8 In some embodiments of the present application, the end of the interrupted opening 2213 close to the connection position between the first clamping member 221 and the second clamping member 222 is a closed end a1, and the end of the interrupted opening 2213 passing through the first clamping member 221 and away from the connection position between the first clamping member 221 and the second clamping member 222 is an open end a2, and the width W2 of the interrupted opening 2213 at the open end a2 is greater than the width W1 of the interrupted opening 2213 at the closed end a1.

[0214] refer to Figure 7-Figure 9 Since the first clamping member 221 is bent toward the pole 21, the circumference of the first clamping member 221 is shorter as it is farther away from the connection position between the first clamping member 221 and the second clamping member 222. The shorter the circumference, the more likely it is that redundancy problems such as piling and wrinkles will occur. The discontinuity 2213 is set to have a relatively large width W2 at the opening end a2, indicating that more width space is reserved at the inner circle position with a shorter circumference to absorb the extension of the first clamping portion 2211, thereby more reliably improving redundancy problems such as piling and wrinkles caused by the bending of the first clamping member 221.

[0215] Please refer to Figure 8In some embodiments of the present application, the width W of the discontinuous opening 2213 gradually increases along the direction from the closed end a1 to the open end a2. Figure 7-Figure 9 Since the first clamping member 221 is bent toward the pole 21, the circumference of the first clamping member 221 gradually shortens in the direction away from the connection position between the first clamping member 221 and the second clamping member 222, and the discontinuity 2213 is set to have a width that gradually increases in the direction from the closed end a1 to the open end a2, so as to be consistent with the trend of the circumference of the first clamping member 221 shortening, so as to more effectively absorb the extension of the first clamping portion 2211, thereby more reliably improving the redundancy problems such as stacking and wrinkles caused by the bending of the first clamping member 221.

[0216] Please refer to Figure 4 , Figure 7-Figure 13 In some embodiments of the present application, the first clamping member 221 includes a surrounding portion 2212 (for example, the portion below the dotted line shown in Figure 10 is the surrounding portion 2212, and the portion above the dotted line is the first clamping member 2211), the surrounding portion 2212 is connected between the first clamping member 2211 and the second clamping member 222, the surrounding portion 2212 extends along the inner and outer directions of the first shell wall 111 (for example, the first direction F1) and extends along the circumference of the pole 21 for the entire circumference, the first clamping member 2211 and the surrounding portion 2212 are an integral piece, and are bent and extended in a direction close to the central axis L of the pole 21 relative to the surrounding portion 2212, and the discontinuous opening 2213 extends from the connection between the surrounding portion 2212 and the first clamping member 2211 in a direction away from the surrounding portion 2212 to penetrate the first clamping member 221. The surrounding portion 2212 is a continuous and uninterrupted annular member that surrounds the entire circumference of the pole 21. The first clamping portion 2211 and the surrounding portion 2212 are an integral piece (ie, an integrally formed piece), which means that the surrounding portion 2212 and the first clamping portion 2211 are not assembled and connected, but are two parts of a structural member.

[0217] Thus, the first clamping member 221 includes a surrounding portion 2212 that does not bend, and the surrounding portion 2212 that does not bend is not provided with a discontinuity 2213, which is conducive to improving the overall structural strength of the clamping structure 22 and improving the clamping reliability of the clamping structure 22 for the pole 21. Moreover, only a part of the first clamping member 221 is bent (that is, the first clamping portion 2211 is bent, and the surrounding portion 2212 is not bent), which is conducive to reducing the bending difficulty of the first clamping member 221. In addition, since the first clamping portion 2211 and the surrounding portion 2212 are an integral part, the processing of the first clamping member 221 is convenient.

[0218] Of course, the present application is not limited to this. For example, in other embodiments of the present application, the first clamping member 221 can also be configured to include only the first clamping portion 2211, without including the surrounding portion 2212 extending along the circumference of the pole 21. At this time, the closed end a1 of the break 2213 is sealed by the second clamping member 222.

[0219] Please refer to Fig.16 and Fig.17 , Fig.16 A three-dimensional diagram of a pole component provided for some embodiments of the present application; Fig.17 for Fig.16 In the schematic diagram of the clamping structure shown in , in some embodiments of the present application, the first clamping portion 2211 has a reinforcing rib 22111 protruding in a direction away from the pole 21. Therefore, by providing the reinforcing rib 22111 on the first clamping portion 2211, the deformation problem of the first clamping portion 2211 can be improved, the clamping reliability of the pole 21 can be improved, and the pressing reliability of the seal 231 between the clamping structure 22 and the pole 21 can be improved, so as to facilitate ensuring the sealing between the clamping structure 22 and the pole 21.

[0220] Please refer to Fig.16 and Fig.17 In some embodiments of the present application, along the direction in which the first clamping member 221 surrounds the pole 21, the reinforcing rib 22111 is located at the central position of the first clamping portion 2211, and the reinforcing rib 22111 extends along the bending trajectory of the first clamping portion 2211. Therefore, by arranging the reinforcing rib 22111 at the central position of the first clamping portion 2211, and by arranging the reinforcing rib 22111 to extend along the bending trajectory of the first clamping portion 2211, the deformation problem of the first clamping portion 2211 can be more effectively improved under the premise that the number of reinforcing ribs 22111 is relatively small, which is conducive to reducing material costs and product weight. Of course, the present application is not limited to this. For example, in other embodiments of the present application, multiple reinforcing ribs 22111 arranged at intervals can also be set on the first clamping portion 2211.

[0221] Please refer to Figure 5-Figure 8 In some embodiments of the present application, the first clamping member 221 and the second clamping member 222 are an integral part (i.e., an integrally formed part), that is, the first clamping member 221 and the second clamping member 222 are not assembled and connected, but are two parts of a structural member, for example, they can be integrally stamped or extruded, etc. Therefore, by setting the first clamping member 221 and the second clamping member 222 as an integral part, the assembly steps of the battery cell 102 as a whole can be reduced, and the assembly efficiency of the battery cell 102 can be improved.

[0222] When the first clamping member 221 and the second clamping member 222 are connected by welding, and one of the first clamping member 221 and the second clamping member 222 is connected to the first shell wall 111 by welding, the problem of cracking caused by welding one of the first places first and the other later can be avoided. Therefore, by setting the first clamping member 221 and the second clamping member 222 as an integral part, it is beneficial to improve the connection reliability of the first clamping member 221 and the second clamping member 222, and the connection reliability of the clamping structure 22 and the first shell wall 111.

[0223] When the first clamp 221 and the second clamp 222 are assembled and connected, the assembly accuracy of the first clamp 221 and the second clamp 222 needs to be strictly limited to avoid problems caused by loose or tight assembly of the first clamp 221 and the second clamp 222, which makes the assembly accuracy requirement higher and reduces the assembly efficiency. For example, if the first clamp 221 and the second clamp 222 are assembled loosely, the seal 231 between the clamp structure 22 and the pole 21 is easy to be unable to be pressed tightly, affecting the sealing between the clamp structure 22 and the pole 21. When the insulating sealing structure 23 includes an insulating member 233 (such as insulating plastic, etc.) located between the clamp structure 22 and the pole 21, if the first clamp 221 and the second clamp 222 are assembled tightly, it is easy to crush the insulating member 233, causing the insulating member 233 to crack, affecting the insulation between the clamp structure 22 and the pole 21. Therefore, by providing the first clamping member 221 and the second clamping member 222 as an integral member, it is beneficial to improve the sealing and insulation between the clamping structure 22 and the pole 21, reduce the assembly precision requirement, and improve the assembly efficiency.

[0224] Please refer to Figure 11-Figure 14 In some embodiments of the present application, when the first clamping member 221 and the second clamping member 222 are an integral part, the second clamping member 222 may be a preformed part connected to the first shell wall 111, and the first clamping member 221 is a riveted part. That is, when the clamping structure 22 and the pole 21 are assembled, the shape of the second clamping member 222 is basically unchanged, but at least a portion of the first clamping member 221 is bent by riveting to form a clamping groove 223 with the second clamping member 222, thereby clamping the pole 21. As a result, the bending of the second clamping member 222 during the assembly process with the pole 21 is omitted, thereby reducing the difficulty of assembling the clamping structure 22 and the pole 21.

[0225] The shape of the first clamping member 221 is not limited, for example, it may include both the surrounding portion 2212 and the first clamping portion 2211 , or it may not include the surrounding portion 2212 but only include the first clamping portion 2211 .

[0226] The connection method between the second clamping member 222 and the first shell wall 111 is not limited, and they can be separate parts that are assembled and connected, or they can be an integrated part.

[0227] Please refer to Figure 11-Figure 14 In some embodiments of the present application, the second clamping member 222 includes a second clamping portion 2221, which cooperates with the first clamping portion 2211 to define a clamping groove 223, and the second clamping portion 2221 has a step structure 22211 protruding in a direction away from the first clamping portion 2211.

[0228] Therefore, since the second clamping portion 2221 has a step structure 22211 protruding in a direction away from the first clamping portion 2211, the structural strength of the second clamping portion 2221 can be strengthened, which is beneficial to improving the supporting strength of the second clamping portion 2221 on the pole 21. In this way, when the first clamping member 221 is riveted, the second clamping portion 2221 and the first clamping portion 2211 can cooperate to reliably clamp the pole 21 and clamp the seal 231 located between the clamping structure 22 and the pole 21, thereby improving the sealing of the matching position between the clamping structure 22 and the pole 21, and improving the problem of reduced sealing due to the deformation of the second clamping portion 2221 due to the rebound force of the seal 231, thereby further improving the sealing of the matching position between the clamping structure 22 and the pole 21.

[0229] In some embodiments, the second clamping portion 2221 can be processed into a shape that gradually tilts along the direction of the center axis L close to the pole 21 toward the direction close to the first clamping portion 2211 before mating with the pole 21, thereby providing a certain amount of reverse deformation. After riveting the first clamping member 221, the second clamping portion 2221 no longer tilts under the elastic force of the seal 231, so as to provide a more reliable clamping capability, so that the compression amount of the seal 231 between the clamping structure 22 and the pole 21 can be more reliably met, thereby improving the sealing of the mating position of the clamping structure 22 and the pole 21.

[0230] In some embodiments of the present application, Fig.18 , Fig.18 A partial cross-sectional view of a battery cell provided in some embodiments of the present application; the clamping structure 22 includes an adapter body 2222, and the adapter body 2222 and at least one of the first clamping member 221 and the second clamping member 222 are an integral part. The adapter body 2222 and the first shell wall 111 are an integral part (i.e., an integrally formed part), for example, they can be integrally stamped or extruded. Therefore, by processing at least a portion of the clamping structure 22 and the first shell wall 111 into an integral part, the step of assembling the adapter body 2222 and the first shell wall 111 can be omitted, thereby improving production efficiency and having relatively low costs.

[0231] Exemplarily, when the first clamping member 221 and the second clamping member 222 are an integral piece, the adapter body 2222 , the first clamping member 221 , the second clamping member 222 and the first shell wall 111 are an integral piece.

[0232] Exemplarily, when the second clamping member 222 is a preformed member, the adapter body 2222 may be a part of the second clamping member 222 . The adapter body 2222 is a preformed structure, and the shape of the adapter body 2222 remains almost unchanged before and after the clamping structure 22 is assembled with the pole 21 .

[0233] Alternatively, in some other embodiments of the present application, the clamping structure 22 includes a adapter body 2222, the adapter body 2222 and at least one of the first clamping member 221 and the second clamping member 222 are integrated into one piece, and the adapter body 2222 is assembled and connected to the first shell wall 111, that is, the clamping structure 22 and the first shell wall 111 are separately processed and formed, and the two are fixedly connected by an assembly process (such as welding, riveting, bonding, etc.).

[0234] Therefore, by arranging the clamping structure 22 to be assembled and connected with the first shell wall 111 through the adapter body 2222, it is convenient to process the clamping structure 22 and the first shell wall 111 separately, which is beneficial to realize the processing and manufacturing of the battery cell 102. It is also beneficial to meet the sealing requirements. When the clamping structure 22 is assembled with the first shell wall 111, the pressure on the first shell wall 111 can be reduced, thereby playing a role in protecting the first shell wall 111.

[0235] For example, in combination Fig.19 , Fig.19 A partial cross-sectional view of a battery cell provided for some embodiments of the present application; when the first clamping member 221 and the second clamping member 222 are an integral part, the adapter body 2222, the first clamping member 221 and the second clamping member 222 are an integral part, and the clamping structure 22 is an integral part as a whole, and then the clamping structure 22 is assembled with the first shell wall 111 using the adapter body 2222.

[0236] Exemplarily, when the second clamping member 222 is a preformed member, the adapter body 2222 may be a part of the second clamping member 222 . The adapter body 2222 is a preformed structure, and the shape of the adapter body 2222 remains almost unchanged before and after the clamping structure 22 is assembled with the pole 21 .

[0237] The pole 21 in the pole component 2 and the first shell wall 111 need to meet the insulation requirements to prevent the first shell wall 111 from being charged. Since the clamping structure 22 surrounds the pole 21, the insulating sealing structure 23 insulates the clamping structure 22 from the pole 21, thereby insulating the pole 21 from the first shell wall 111. In addition, the insulating sealing structure 23 makes the matching position of the clamping structure 22 and the pole 21 present a sealed state, so as to isolate the inside and outside of the shell 1 after the clamping structure 22 and the first shell wall 111 are assembled and connected, thereby reducing the risk of the electrolyte in the shell 1 leaking from the matching position of the clamping structure 22 and the pole 21 to the outside of the shell 1, and reducing the risk of liquid or dust outside the shell 1 entering the shell 1 from the matching position of the clamping structure 22 and the pole 21, thereby improving the reliability of the battery cell 102.

[0238] That is to say, since the pole component 2 includes, in addition to the pole 21 connected to the electrode component 3, a clamping structure 22 assembled and connected to the first shell wall 111, and at least a portion of the insulating sealing structure 23 is arranged between the clamping structure 22 and the pole 21, the insulating sealing structure 23 plays an insulating and sealing role at the connection between the pole 21 and the clamping structure 22, so that the pole component 2 itself has self-sealing properties. When the pole component 2 is installed on the first shell wall 111, there is no need to consider the sealing problem between the clamping structure 22 and the first shell wall 111. Therefore, there is no need to apply a large force to the pole component 2 in order to meet the sealing of the connection between the clamping structure 22 and the first shell wall 111, thereby improving the problem of deformation of the first shell wall 111 due to force, which is conducive to reducing the wall thickness of the first shell wall 111, reducing material costs, and reducing the weight of the battery cell 102, achieving lightweight production, and improving energy density.

[0239] The structure of the housing 1 is not limited. For example, the housing 1 includes a housing body that participates in forming the accommodating cavity 13, one end of the housing body has an opening, and the end of the housing body opposite to the opening is a first housing wall 111. For another example, the housing 1 includes a housing cover that participates in forming the accommodating cavity 13, and the housing cover is the first housing wall 111. Therefore, the structural design of the housing 1 is flexible, and the setting position of the pole component 2 is flexible.

[0240] When the end of the shell body opposite to the opening is the first shell wall 111, the shell body can be an integral piece and includes the first shell wall 111 and a second shell wall, the second shell wall surrounds the edge of the first shell wall 111, and the second shell wall extends from the edge of the first shell wall 111 toward one side in the thickness direction of the first shell wall 111, the end of the second shell wall facing away from the first shell wall 111 defines an opening, and a cavity is defined between the first shell wall 111 and the second shell wall, and the cavity constitutes at least a part of the accommodating cavity 13.

[0241] In the above technical solution, since the electrode component 3 accommodated in the shell 1 is connected to the pole component 2 installed on the first shell wall 111, when the battery device 100 vibrates or deforms, the pole components 2 connected by the busbar component will be pulled against each other. Since the pole component 2 is arranged on the end wall of the shell body 11 opposite to the opening, the force applied to the pole component 2 will be preferentially transmitted to the shell body 11, and will not directly act on the shell cover 12, thereby not only extending the distance for the force to be transmitted to the connection between the shell body 11 and the shell cover 12, but also the shell body 11 will preferentially deform when subjected to force, so as to reduce the force applied to the connection between the shell body 11 and the shell cover 12, thereby effectively reducing the probability of cracking at the connection between the shell body 11 and the shell cover 12 during the use of the battery device 100, and improving the reliability of the battery cell 102.

[0242] Furthermore, since the connection position between the shell body 11 and the shell cover 12 is not prone to cracking, there is no need to increase the wall thickness of the shell body 11 and the shell cover 12 to increase the reliability of the connection between the two, which is beneficial to reducing weight and material costs, and is beneficial to miniaturizing the battery cell 102, or improving the energy density of the battery cell 102. The connection method between the shell body 11 and the shell cover 12 is not limited, for example, it can be bonding, welding, etc.

[0243] For example, when the end wall of the shell body 11 opposite to the opening 113 is used as the first shell wall 111 for mounting the pole component 2, if the pole component 2 is first assembled to the mounting hole 112 on the first shell wall 111, and then the electrode component 3 is installed in the shell body 11, it is difficult to connect the electrode component 3 with the pole component 2. Fig. 20 and Fig.21 , Fig. 20 An intermediate state diagram of the assembly of a battery cell provided in some embodiments of the present application; Fig.21 for Fig. 20 The local cross-sectional view of the battery cell after assembly shown in the figure; the electrode component 3 and the pole component 2 can be connected first, and then the pole component 2 can be assembled and connected to the first shell wall 111, so as to meet the connection requirements between the electrode component 3 and the pole component 2, and also meet the connection requirements between the pole component 2 and the first shell wall 111, thereby improving the reliability and processability of the battery cell 102.

[0244] Moreover, this processing sequence can effectively shorten the length of the conductive part 4. For example, as long as the electrode component 3 is connected to the pole component 2 first, the pole component 2 is connected to the first shell wall 111 later, thereby saving the material and cost of the conductive part 4, reducing the redundancy of the conductive part 4, reducing the risk of short circuit, and reducing the space occupied by the conductive part 4 in the shell 1, which is conducive to improving the energy density of the battery cell 102. The material of the shell 1 is not limited, for example, including but not limited to aluminum shell, steel shell, aluminum plastic film, plastic or other electrolyte corrosion resistant materials.

[0245] In some embodiments of the present application, the first clamping member 221 is disposed on a side of the second clamping member 222 away from the electrode component 3, so that the first clamping member 221 can be bent on the outside of the pole 21, reducing the difficulty of assembling the clamping structure 22. Of course, the present application is not limited thereto, for example, in other embodiments of the present application, the second clamping member 222 can also be disposed on a side of the first clamping member 221 away from the electrode component 3, and in this case, the first clamping member 221 can be bent on the inside of the pole 21.

[0246] Please refer to Fig.21 and Fig. 22 , Fig. 22 A partial cross-sectional view of a battery cell provided for some embodiments of the present application; in some embodiments of the present application, the first clamping member 221 is arranged on the side of the second clamping member 222 away from the electrode component 3, and the insulating sealing structure 23 includes a seal 231, and at least a portion of the seal 231 is clamped between the pole 21 and the second clamping member 222.

[0247] Thus, the seal 231 can be arranged closer to the electrolyte in the housing 1, which is conducive to better preventing the electrolyte from penetrating into the matching position of the pole 21 and the clamping structure 22, and reducing the problem of the electrolyte leaking out of the housing 1 through the matching position of the pole 21 and the clamping structure 22. The material of the seal 231 is not limited, for example, it can be a sealing material with good elasticity such as rubber.

[0248] In some embodiments of the present application, Fig.21 As shown, the pole 21 may be a composite pole, for example, it may include a first metal part 211 and a second metal part 212 of different materials, the first metal part 211 is located on a side of the second metal part 212 away from the electrode component 3, and the second metal part 212 is connected to the electrode component 3. At this time, at least a portion of the seal 231 may be disposed on a side of the joint surface of the first metal part 211 and the second metal part 212 close to the electrode component 3, so that the seal 231 may be used to prevent the electrolyte in the housing 1 from penetrating into the joint surface of the first metal part 211 and the second metal part 212 to cause corrosion of the pole 21, thereby improving the reliability of the pole 21.

[0249] Please refer to Fig.23 and Fig.24 , Fig.23 A partial cross-sectional view of a battery cell provided for some embodiments of the present application; Fig.24 for Fig.23 In some embodiments of the present application, the pole 21 may be a composite pole, for example, it may include a first metal part 211 and a second metal part 212 of different materials, the first metal part 211 is located on the side of the second metal part 212 away from the electrode part 3, and the second metal part 212 is connected to the electrode part 3. At this time, the outer periphery of the first metal part 211 and the outer periphery of the second metal part 212 adjacent to the first metal part 211 may be coated with a protective metal layer 213, so as to solve the problem of corrosion of the pole 21 caused by accidental infiltration of the electrolyte into the joint surface of the first metal part 211 and the second metal part 212, and play an anti-corrosion role.

[0250] It is worth noting that when the pole 21 includes the above-mentioned protective metal layer 213, the setting position of the seal 231 is not limited. For example, at least a portion of the seal 231 can be clamped between the pole 21 and the second clamping member 222. Specifically, at least a portion of the seal 231 can be set on the side of the joint surface of the first metal part 211 and the second metal part 212 close to the electrode component 3; or, the seal 231 can also be set at other positions, that is, not including the part clamped between the pole 21 and the second clamping member 222, thereby realizing flexible setting of the seal 231.

[0251] In an embodiment of the present application, the pole 21 can be used as a negative pole or a positive pole. Exemplarily, when the pole 21 is used as a negative pole, the pole 21 can be a copper-aluminum composite pole, and a copper material is provided on the side close to the electrode component 3, which is consistent with the material of the electrode component 3, which is conducive to the electrical connection between the two, and an aluminum material is provided on the side away from the electrode component 3, which is consistent with the material of the aluminum busbar component, which is conducive to the electrical connection between the two. The copper-aluminum composite position is prone to corrosion when in contact with the electrolyte. At this time, a protective metal layer 213, such as a copper plating layer, is coated near the position of the copper-aluminum joint surface to reduce the probability of corrosion. Exemplarily, when the pole 21 is used as a positive pole, the pole 21 can be a pure aluminum pole, and at this time, the pole 21 may include a protective metal layer 213 or may not include a protective metal layer 213.

[0252] It is worth noting that the above material description is only for example, and the material selection of the pole 21, the material selection of the protective metal layer 213, and the material selection of the busbar component can be specifically set according to actual requirements and are not limited here.

[0253] In some embodiments of this application, please refer to Fig.19 and Fig. 22The second clamping member 222 includes a second clamping portion 2221 that cooperates with the first clamping portion 2211 to form a clamping groove 223. The second clamping portion 2221 includes an end portion 22211 and a root portion 22212. The end portion 22211 is arranged away from the first shell wall 111 relative to the root portion 22212 (that is, it is arranged close to the central axis L of the pole 21). At least a portion of the seal 231 is clamped between the root portion 22212 and the pole 21.

[0254] Therefore, since the second clamping portion 2221 is in a cantilever form, the end portion 22211 is more easily deformed than the root portion 22212, and at least a portion of the seal 231 is clamped between the root portion 22212 of the second clamping portion 2221, which is less likely to deform, and the pole 21, thereby helping to improve the reliability of the seal 231 being clamped, so that the sealing compression amount of the seal 231 can be guaranteed, thereby improving the sealing reliability.

[0255] Please refer to Fig.25 , Fig.25 A partial cross-sectional view of a battery cell provided for some embodiments of the present application; when at least a portion of the seal 231 is clamped between the root 22212 and the pole 21, in some embodiments of the present application, the seal 231 can also be clamped between the end 22211 and the pole 21 at the same time.

[0256] As a result, the sealing area of ​​the seal 231 is larger and can be closer to the electrolyte in the shell 1, which is beneficial to better prevent the electrolyte from penetrating into the matching position of the pole 21 and the clamping structure 22, and reduce the problem of the electrolyte leaking out of the shell 1 through the matching position of the pole 21 and the clamping structure 22.

[0257] Please refer to Fig. 22 When at least part of the seal 231 is clamped between the root 22212 and the pole 21, in some embodiments of the present application, the seal 231 can also be clamped between the first clamp 221 and the pole 21 at the same time, so that at least part of the seal 231 is located between the connection position of the first clamp 221 and the second clamp 222 and the pole 21. At this time, the seal 231 can also include a part (for example, Fig.25 As shown), the portion clamped between the end 22211 and the pole 21 (eg Fig.24 as shown).

[0258] As a result, the sealing area of ​​the seal 231 is larger, which can reduce the risk of electrolyte leaking out of the housing 1 along the matching position of the pole 21 and the clamping structure 22. In addition, when the pole 21 is a composite pole, the setting position of the seal 231 can be more easily close to the material composite surface position of the pole, thereby more effectively improving the problem of corrosion of the pole 21.

[0259] In some embodiments of this application, please refer to Fig.23 and Fig.24 The seal 231 is an integral part and the seal 231 also includes a portion clamped between the first clamping portion 2211 and the pole 21. That is, the seal 231 is an integrally formed part, including a plurality of inseparable parts. Fig.24 As shown, the seal 231 may include a first seal portion 2311, a second seal portion 2312 and a third seal portion 2313; the first seal portion 2311 is clamped between the first clamp portion 2211 and the pole 21, the second seal portion 2312 is clamped between the second clamp portion 2221 and the pole 21, and the third seal portion 2313 is connected between the first seal portion 2311 and the second seal portion 2312, and is also clamped between the clamping structure 22 and the pole 21. As a result, the sealing area of ​​the seal 231 is larger, and the seal 231 is easier to process, which can improve the sealing effect.

[0260] In some embodiments of this application, please refer to Figure 11-Figure 14 One of the first clamping member 221 and the second clamping member 222 is a preformed member, and the other is a riveted formed member, and the preformed member is connected to the first shell wall 111; the insulating sealing structure 23 includes: a sealing member 231, at least part of which is clamped between the pole 21 and the preformed member.

[0261] That is, the first clamping member 221 is a preformed member, and the second clamping member 222 is a riveted member; or, the first clamping member 221 is a riveted member, and the second clamping member 222 is a preformed member. When the clamping structure 22 is assembled with the pole 21, the shape of the preformed member is basically unchanged, but at least a portion of the riveted member in the initial form is bent by riveting to form a clamping groove 223 with the preformed member, thereby clamping the pole 21. The connection method between the preformed member and the first shell wall 111 is not limited, and the preformed member can be a separate member assembled and connected, or a one-piece member.

[0262] In the above technical solution, since the shape of the preformed part does not change substantially before and after riveting, at least a portion of the seal 231 is clamped between the pole 21 and the preformed part, and the compression amount of the seal 231 can be controlled relatively easily, so that the seal 231 has a relatively reliable sealing effect.

[0263] Exemplarily, when the seal 231 is an integral piece, and the seal 231 includes both a portion clamped between the riveted molded part and the pole 21, and a portion clamped between the preformed part and the pole 21, the seal 231 can be processed into a shape that matches the clamping structure 22. As the riveted molded part is riveted and bent, the seal 231 is bent synchronously, thereby simplifying assembly and processing.

[0264] In some embodiments of this application, please refer to Fig.21 , when the first clamping member 221 is disposed on the side of the second clamping member 222 away from the electrode component 3; the insulating sealing structure 23 may include an insulating bracket 232, at least part of which is disposed on the side of the second clamping member 222 away from the first clamping member 221. Thus, by providing the insulating bracket 232, the battery cell 102 can prevent the short circuit electrical connection between the clamping structure 22 and the electrode component 3 under the use environment such as vibration, thereby improving the reliability of the battery cell 102.

[0265] For example, please refer to Fig.18 When the clamping structure 22 and the first shell wall 111 are an integral part, the insulating bracket 232 can be an integral part (i.e., integrally formed, so that the insulating bracket 232 is an inseparable integral structural part) and also includes a first extension portion 2324 extending to the inner side of the first shell wall 111. Therefore, the insulating bracket 232 can also simultaneously play a role in preventing a short circuit electrical connection between the first shell wall 111 and the electrode component 3, thereby further improving the reliability of the battery cell 102, and it is possible to eliminate the need to set other insulating material brackets between the first shell wall 111 and the electrode component 3, thereby simplifying the structure of the battery cell 102, reducing costs, and improving assembly efficiency.

[0266] For example, please refer to Fig. 22 When the clamping structure 22 and the first shell wall 111 are separate parts, the insulating bracket 232 can be an integral part (that is, integrally formed, so that the insulating bracket 232 is an inseparable integral structural part) and also includes a second extension portion 2325 extending between the second clamping member 222 and the pole 21. Therefore, the insulating bracket 232 can also simultaneously prevent the second clamping member 222 from causing a short circuit electrical connection to occur between the pole 21, thereby further improving the reliability of the battery cell 102, simplifying the structure, reducing parts, and reducing costs.

[0267] In some embodiments of this application, please refer to Fig. 22 When the insulating support 232 includes the second extension 2325, and the seal 231 includes a portion clamped between the root 22212 and the pole 21, the second extension 2325 can be clamped between the end 22211 and the pole 21, and a gap is maintained between the second extension 2325 and the portion of the seal 231 clamped between the root 22212 and the pole 21. Thus, a space for the seal 231 to be compressed and deformed is reserved, so that the compression amount of the seal 231 can meet the demand.

[0268] In some embodiments of the present application, Figure 11-Figure 14As shown, the first clamping member 221 is arranged on the side of the second clamping member 222 away from the electrode component 3; the insulating sealing structure 23 includes an insulating member 233, and the insulating member 233 includes an inner insulating portion 2331, and at least part of the inner insulating portion 2331 is clamped between the pole 21 and the first clamping member 221. Therefore, by providing the inner insulating portion 2331, a more reliable insulation effect can be achieved between the pole 21 and the first clamping member 221.

[0269] In some embodiments of the present application, Figure 11-Figure 14 As shown, when the insulating sealing structure 23 includes an insulating member 233 , the insulating sealing structure 23 also includes a sealing member 231 , at least part of which is clamped between the pole 21 and the second clamping member 222 , and the hardness of the insulating member 233 is greater than that of the sealing member 231 .

[0270] Therefore, when the first clamping member 221 is bent, since the seal 231 is clamped between the pole 21 and the second clamping member 222, and the inner insulating part 2331 is clamped between the pole 21 and the first clamping member 221, the bending position can be far away from the seal 231, thereby making it easy to control the compression amount of the seal 231 and improve the sealing effect.

[0271] For example, Fig.14 As shown, the seal 231 and the inner insulating part 2331 are separate parts, and there is a gap between the seal 231 and the inner insulating part 2331. Therefore, the setting of the inner insulating part 2331 reserves space for the seal 231 to be compressed and deformed, so that the compression amount of the seal 231 can meet the demand. Moreover, since the seal 231 and the insulating part 233 are separate parts and are not integrated, when the pole 21 and the clamping structure 22 are assembled, the two can be flexibly arranged according to actual conditions, which reduces the difficulty of assembly and improves the assembly efficiency.

[0272] Of course, the present application is not limited thereto. For example, in other embodiments of the present application, the sealing member 231 and the insulating member 233 may also be connected to form an inseparable whole.

[0273] In some embodiments of the present application, Figure 11-13 As shown, the inner insulating portion 2331 can be injection molded on the pole 21. As a result, the inner insulating portion 2331 is not easily separated from the pole 21, the insulation effect can be improved, and the assembly steps can be simplified. Of course, the present application is not limited to this, for example, the inner insulating portion 2331 can also be set to be connected to the pole 21 for assembly. In addition, the inner insulating portion 2331 injection molded on the pole 21 can play a shaping and restraining role on the bending deformation of the first clamping member 221.

[0274] In some embodiments of the present application, Figure 11-Figure 14As shown, when the insulating member 233 includes the inner insulating portion 2331, the insulating member 233 may also include an outer insulating portion 2332, at least part of which is wrapped outside the first clamping member 221 (i.e., wrapped on the side of the first clamping member 221 away from the clamping groove 223). Thus, the outer insulating portion 2332 can be used to isolate the short-circuit electrical connection between the busbar component and the clamping structure 22, and play an insulating effect between the busbar component and the clamping structure 22, thereby improving the reliability of the battery device 100.

[0275] In some embodiments of the present application, Fig.14 As shown, the inner insulating part 2331 is connected to the outer insulating part 2332. Thus, the risk of the outer insulating part 2332 being separated from the clamping structure 22 can be reduced, and the reliability of the insulation of the outer insulating part 2332 between the busbar component and the clamping structure 22 can be improved.

[0276] The position where the inner insulating portion 2331 is connected to the outer insulating portion 2332 is not limited. For example, in some embodiments, the inner insulating portion 2331 is connected to the outer insulating portion 2332 via the discontinuity 2213. For another example, in some embodiments, Fig.19 As shown, the first clamping member 221 is provided with a through hole 2215, and the inner insulating portion 2331 is connected to the outer insulating portion 2332 through the through hole 2215. For another example, in some embodiments, the inner insulating portion 2331 and the outer insulating portion 2332 are connected through the discontinuous opening 2213, and the first clamping member 221 is provided with a through hole 2215, and the inner insulating portion 2331 and the outer insulating portion 2332 are connected through the through hole 2215.

[0277] Therefore, while satisfying the connection between the inner insulating part 2331 and the outer insulating part 2332, no new structural components will be generated due to the connection, and no new parts will be protruding from the clamping structure 22, which can simplify the structural design and processing, reduce costs, and is conducive to maintaining the first clamping member 221 with a relatively stable structural strength, thereby improving the clamping reliability and sealing reliability.

[0278] When the inner insulating part 2331 is connected to the outer insulating part 2332, the connection method between the inner insulating part 2331 and the outer insulating part 2332 is not limited. For example, in some embodiments, the inner insulating part 2331 and the outer insulating part 2332 can be an integral part to achieve a natural connection, or in other embodiments, the inner insulating part 2331 and the outer insulating part 2332 can also be separately molded and connected through assembly processes such as bonding or welding.

[0279] Exemplarily, when the inner insulating part 2331 and the outer insulating part 2332 are an integral part, and the inner insulating part 2331 and the outer insulating part 2332 are connected through the interruption 2213 or the through hole 2215, the insulating part can be obtained by integral injection molding. For example, insulating material is injected into the outside of the clamping structure 22, and a part of the insulating material can pass through the interruption 2213 or the through hole 2215 into between the clamping structure 22 and the pole 21 to form the inner insulating part 2331, and the rest of the insulating material remains outside the clamping structure 22 to form the outer insulating part 2332.

[0280] In some embodiments of the present application, when the first clamping member 221 is disposed on a side of the second clamping member 222 away from the electrode component 3; Fig.21 As shown, the insulating sealing structure 23 may include: an insulating member 233, the insulating member 233 includes an outer insulating portion 2332, at least part of the outer insulating portion 2332 is externally wrapped outside the first clamping member 221, that is, externally wrapped on a side of the first clamping member 221 away from the clamping groove 223. At this time, the insulating member 233 may include the above-mentioned inner insulating portion 2331, or may not include the above-mentioned inner insulating portion 2331.

[0281] Thus, by providing the outer insulating portion 2332 to enclose the clamping structure 22, it can be used to isolate the short-circuit electrical connection between the current collecting component and the clamping structure 22, and play an insulating effect between the current collecting component and the clamping structure 22, thereby improving the reliability of the battery device 100. In addition, the provision of the outer insulating portion 2332 can play a filling effect, filling the folds or stacked positions of the first clamping member 221, so as to play a more reliable insulation effect between the clamping structure 22 and the current collecting component.

[0282] In some embodiments of the present application, Fig. 22 and Fig.24 As shown, the side surface of the outer insulating portion 2332 away from the electrode component 3 (i.e., the outer surface of the outer insulating portion 2332) is lower than or flush with the side surface of the pole 21 away from the electrode component 3 (i.e., the outer surface of the pole 21). In other words, the outer surface of the outer insulating portion 2332 does not protrude from the outer surface of the pole 21 in the direction away from the electrode component 3. For example, the outer surface of the outer insulating portion 2332 may be flush with the outer surface of the pole 21. For another example, at least a portion of the outer surface of the outer insulating portion 2332 protrudes from the outer surface of the pole 21 in the direction away from the electrode component 3.

[0283] Therefore, although at least part of the outer insulating portion 2332 is externally wrapped outside the first clamping member 221, the side surface of the outer insulating portion 2332 away from the electrode component 3 (i.e., the outer surface of the outer insulating portion 2332) does not protrude in the direction away from the electrode portion 3 beyond the side surface of the pole 21 away from the electrode component 3 (i.e., the outer surface of the pole 21), so that the outer insulating portion 2332 externally wrapped outside the first clamping member 221 will not partially lift up the bus component connected to the pole 21, thereby improving the connection reliability and stability between the bus component and the pole 21.

[0284] For example, when the busbar component and the pole 21 are connected by welding, if the outer surface of the outer insulating portion 2332 is flush with the outer surface of the pole 21, the outer insulating portion 2332 can play a role in supporting the welding nozzle, which is beneficial to the welding operation of the busbar component and the pole 21. That is, by controlling the thickness of the outer insulating portion 2332, the outer surface of the outer insulating portion 2332 can be close to or reach the level of being flush with the outer surface of the pole 21, so as to support the welding nozzle and facilitate the welding of the pole 21 and the busbar component.

[0285] In some embodiments of the present application, Fig.24 As shown, the outer insulating portion 2332 includes an embedded portion 23321 sandwiched between the outer circumference of the pole 21 and the inner circumference of the first clamping member 221. Therefore, by providing the embedded portion 23321, the gripping force can be improved, the problem of the outer insulating portion 2332 being peeled off can be improved, the matching reliability and stability of the outer insulating portion 2332 and the clamping structure 22 can be improved, and the reliability of the insulation between the clamping structure 22 and the current collecting component can be improved.

[0286] In some embodiments of the present application, the outer insulating portion 2332 can fill the discontinuity 2213. Thus, the setting of the outer insulating portion 2332 can have a more effective filling effect, which can not only fill the wrinkled or stacked positions of the first clamping member 221, but also fill the missing pit positions of the first clamping member 221.

[0287] In some embodiments of the present application, Fig.25 As shown, the pole component 2 further includes a reinforcing sheet 24, which is disposed between the first clamping member 221 and the portion of the insulating sealing structure 23 that is disposed between the first clamping member 221 and the pole 21, and is bent into a shape that matches the first clamping member 221. That is, the reinforcing sheet 24 can be processed into a shape that matches the clamping structure 22, and as the first clamping member 221 is bent, the first clamping member 221 is bent synchronously, thereby simplifying assembly and processing. The reinforcing sheet 24 refers to a sheet having a hardness greater than that of the insulating sealing structure 23, and for example, the reinforcing sheet 24 can be a copper sheet or the like.

[0288] Therefore, by providing the reinforcing sheet 24, the reinforcing sheet 24 can be used to strengthen the structure, thereby improving the strength of the first clamping member 221, so that the clamping structure 22 can clamp the pole 21 more reliably and improve the sealing insulation between the clamping structure 22 and the pole 21.

[0289] In some embodiments of the present application, Figure 11-Figure 14 The first clamping member 221 is arranged on the side of the second clamping member 222 away from the electrode component 3. The first clamping member 221 and the second clamping member 222 are integrally formed. The first clamping member 221 is a riveted molded member, and the second clamping member 222 is a preformed member. The insulating sealing structure 23 includes a sealing member 231 and an insulating member 233. The sealing member 231 is a rubber member, and the insulating member 233 is a plastic member. The insulating member 233 includes an inner insulating portion 2331 and an outer insulating portion 2332. The sealing member 231 is clamped between the second clamping member 222 and the pole 21. The inner insulating portion 2331 is clamped between the first clamping member 221 and the pole 21, and is injection molded on the pole 21. The outer insulating portion 2332 is wrapped outside the first clamping member 221.

[0290] When assembling the pole component 2, first place the sealing member 231 between the pole 21 and the second clamping member 222, then after pressing the pole down to a certain extent, rivet the first clamping member 221 inwardly and press it on the inner insulating portion 2331 injection-molded on the pole 21, and then wrap the outer insulating portion 2332 on the outer side of the first clamping member 221 to form a complete seal.

[0291] Therefore, the use of the above-mentioned pole component 2 is conducive to improving the overall structural strength, eliminating the problems of insufficient strength caused by the welding assembly of the first clamp 221 and the second clamp 222, cracking of the insulating component 233, and a small usable area on the outer surface of the pole 21 when the busbar component is connected to the pole 21. By omitting the laser welding of the first clamp 221 and the second clamp 222, the process can be simplified and process defects can be reduced.

[0292] In some embodiments of the present application, Fig. 22 and Fig.26 As shown, Fig.26 A cross-sectional view of a pole component provided in some embodiments of the present application. The insulating sealing structure 23 includes an insulating bracket 232, at least part of which is disposed on a side of the clamping structure 22 close to the electrode component 3, and the pole 21 includes an inner convex portion 214 located in the inner ring region of the insulating bracket 232, the inner convex portion 214 protrudes relative to the clamping structure 22 toward the electrode component 3, and a side surface S1 of the inner convex portion 214 close to the electrode component 3 is flush with a side surface S2 of the insulating bracket 232 close to the electrode component 3. As a result, the pole 21 can be relatively close to the electrode component 3, facilitating the connection operation between the electrode component 3 and the pole 21.

[0293] In some embodiments of the present application, Fig.21 and Fig. 27 As shown, Fig. 27 The cross-sectional view of the pole component provided in some embodiments of the present application. The pole component 2 defines a receiving groove 25 that is recessed in a direction away from the electrode component 3, and the pole 21 defines a groove end wall 215 on a side of the receiving groove 25 away from the electrode component 3. The electrode component 3 is electrically connected to the pole 21 through the conductive part 4, and at least a part of the conductive part 4 is received in the receiving groove 25 and connected to the groove end wall 215.

[0294] Therefore, since at least part of the conductive part 4 is received in the receiving groove 25 defined by the pole component 2, the space occupied by the conductive part 4 in the shell 1 can be reduced, so that more space can be saved in the shell 1 to accommodate the electrode component 3, electrolyte or gas production, etc., thereby improving the energy density or reliability of the battery cell 102.

[0295] In some embodiments of the present application, Figure 11-Figure 14 , Fig. 20 and Fig.21 When assembling the battery cell 102, first assemble the electrode component 2, such as Fig.11 After the composite pole 21 is manufactured, Fig.12 , the edge of the pole 21 is covered with rubber (i.e., the inner insulating part 2331 is injected), and then the covered pole 21 together with the seal 231 and the insulating bracket 232 are mounted to the clamping structure 22, and then the first clamping member 221 is riveted, and then as Fig.13 , and then the clamping structure 22 is covered with glue (i.e., the outer insulating part 2332 is injection molded); on the other hand, the pole ear sheet of the electrode component 3 is ultrasonically welded into a plate-shaped pole ear part 33, and then the pole ear part 33 is passed through the mounting hole 112 on the first shell wall 111 from the inside to the outside, and then installed into the accommodating groove 25 of the pole column component 2 outside the first shell wall 111, and the pole ear part 33 is laser welded to the groove end wall 215, and then the pole column component 2 is turned 90° from the outside of the shell 1, and the cover is set at the mounting hole 112, and then the pole column component 2 is welded to the first shell wall 111, so as to achieve the sealing of the mounting hole 112, and then the helium inspection can be carried out to detect the sealing defective products.

[0296] Of course, the present application is not limited to this. The pole ear portion 33 may be welded to the pole 21 first, and then the pole component 2 is passed through the mounting hole 112 to the outside of the shell 1, and then the pole component 2 is flipped 90° from the outside of the shell 1, and the cover is set at the mounting hole 112, and then the pole component 2 is welded to the first shell wall 111, so as to achieve the sealing of the mounting hole 112.

[0297] In order to avoid wrinkles and piles of materials after the first clamping member 221 is riveted, a prefabricated groove 2214 can be pre-formed on the first clamping member 221 before the first clamping member 221 is bent. The prefabricated groove 2214 can be milled and formed by an end of the first clamping member 221 away from the second clamping member 222 being concave toward the second clamping member 222 (for example, in combination with Fig. 9 and Fig.10 After the first clamping member 221 is bent, the first clamping portion 2211 extends toward the central axis of the pole 21, and a clamping groove 223 is formed between the first clamping member 221 and the second clamping member 222 to clamp the pole 21. After the first clamping member 221 is bent, due to the deformation of the first clamping portion 2211, the prefabricated groove 2214 is transformed into a discontinuous opening 2213 (for example, a combination of the first clamping portion 2211 and the second clamping portion 222) between two adjacent first clamping portions 2211. Figure 7 and Figure 8 as shown).

[0298] Combination Fig.10 The first clamping member 221 is divided into two parts: a surrounding portion 2212 and a first clamping portion 2211. The surrounding portion 2212 is a closed ring. The first clamping portion 2211 is connected to the side of the surrounding portion 2212 away from the second clamping member 222. There are multiple first clamping portions 2211 and they are arranged at intervals along the circumference of the surrounding portion 2212. A prefabricated groove 2214 is formed between every two adjacent first clamping portions 2211. The prefabricated groove 2214 runs through the end of the surrounding portion 2212 away from the second clamping member 222 toward the direction away from the second clamping member 222.

[0299] Combination Fig.10 , Fig.28 Before the first clamping member 221 is bent, the maximum height of the first clamping member 221 in the axial direction of the pole 21 (i.e., the extension direction of the central axis L) is H4. After the first clamping member 221 is bent, the arc radius corresponding to this position of the first clamping member 221 is R1.

[0300] Combination Fig.10 , Fig.28 and Fig.29 Before the first clamping member 221 is bent, the height of the surrounding portion 2212 in the axial direction of the pole 21 (i.e., the extension direction of the central axis L) is H3 (i.e., H3 is the minimum distance between the prefabricated groove 2214 and the second clamping member 222 in the axial direction of the pole 21). After the first clamping member 221 is bent, the arc radius corresponding to this position of the surrounding portion 2212 is R0.

[0301] Combination Fig.10 and Fig.28Before the first clamping member 221 is bent, the width of the prefabricated groove 2214 at a distance H from the second clamping member 222 in the axial direction of the pole 21 is W, and after the first clamping member 221 is bent, the arc radius corresponding to this location of the prefabricated groove 2214 is R. H3≤H≤H4, R0≤R≤R1.

[0302] For the racetrack-shaped pole 21, after the first clamping member 221 is bent, the redundancy E is:

[0303] E= (2πR0+2L) -(2πR +2L)= 2π(R0- R)≈ 2π(H- H3);

[0304] If there are n prefabricated grooves 2214, the width W of a single prefabricated groove 2214 is:

[0305] W=E / n=2π(H- H3) / n.

[0306] For example, in combination Fig.30 and Fig.31 The area S of the laser weld N formed by welding the pole 21 and the pole ear 33 is greater than or equal to 60 mm 2 , S = U2 × L1, that is, U2 × L1 ≥ 60mm 2 Wherein, L1 is the length of the laser weld N, and U2 is the width of the laser weld N.

[0307] The length of the inner contour of the press-fitting fixture 6 used for welding the pole 21 and the pole ear portion 33 is L2, and the width of the inner contour of the press-fitting fixture 6 is U3. Based on the operation requirements, 3mm≤L2-L1≤5mm, 3mm≤U3-U2≤5mm.

[0308] The length of the ultrasonic weld mark M obtained by ultrasonic welding of the multiple layers of the pole tab sheets in the pole tab portion 33 is greater than or equal to L2, and the width of the ultrasonic weld mark M is greater than or equal to U3. A standard welding head is used, the length of the standard welding head is 22mm, the width is 8mm, and the weld mark splicing is adopted.

[0309] Therefore, 22Y / 8X≈L2 / U3, where X and Y are both positive integers.

[0310] The straight side length L of the exposed portion of the inner surface of the racetrack-shaped pole 21 is close to the length L2 of the inner contour of the press-fitting fixture 6, for example, the difference can be about 2 mm; the arc diameter 2R2 of the exposed portion of the inner surface of the racetrack-shaped pole 21 is greater than or equal to the width U3 of the inner contour of the press-fitting fixture 6, such as a surplus of 0.5 mm can be reserved on one side.

[0311] Therefore, 22Y / 8X≈(L±2mm) / (2R2-1mm).

[0312] In addition, the length (22Y) of the ultrasonic weld mark M is less than or equal to the width L3 of the tab piece minus the misalignment amount 2e, where e is the single-side misalignment amount.

[0313] Therefore, 22Y≤L3-2e, e is generally taken as 8mm.

[0314] In order to meet the requirement that the pole ear portion 33 passes through the mounting hole 112, the length of the mounting hole 112 is ≥ the width of the pole ear piece L3 plus the offset 2e. The length of the mounting hole 112 is close to the total length (2R3+L) of the clamping structure 22, wherein the outer contour of the clamping structure 22 is a runway shape, L is the straight side length of the runway shape of the outer contour of the clamping structure 22, and R3 is the arc radius of the two ends of the runway shape of the outer contour of the clamping structure 22.

[0315] Therefore, 2R3+L≥L3+2e, where e is generally 8mm.

[0316] Based on the above formula, the value range of the arc radius R3 at both ends of the racetrack-shaped clamping structure 22 can be obtained.

[0317] In an embodiment of the present application, 1mm≤R3-R0≤2mm can be limited so that the length of the adapter body 2222 will not be too long, which can improve the structural reliability of the clamping structure 22 and the connection reliability between the clamping structure 22 and the shell 1, and the length of the adapter body 2222 will not be too short, thereby facilitating the connection operation between the clamping structure 22 and the shell 1.

[0318] Therefore, based on the above-mentioned associated design, the size of the prefabricated groove 2214 can be designed to meet the requirement that after the first clamping member 221 is bent, a discontinuity 2213 can be formed between two adjacent first clamping parts 2211.

[0319] In some embodiments of the present application, Figure 3 As shown, the battery cell 102 further includes a pressure relief device 5, which is disposed on the housing 1 and is located on the same side as the pole component 2. Alternatively, in some other embodiments of the present application, the pressure relief device 5 and the pole component 2 may also be located on different sides.

[0320] Exemplarily, the housing 1 may be surrounded by a plurality of walls facing in different directions, one of which is a first housing wall 111, and one or more pole components 2 may be disposed on the first housing wall 111. When the pressure relief device 5 is also disposed on the first housing wall 111, the pressure relief device 5 and the pole component 2 are located on the same side; and when the pressure relief device 5 is disposed on a wall other than the first housing wall 111, the pressure relief device 5 and the pole component 2 are located on different sides.

[0321] For example, the pressure relief device 5 may be an explosion-proof valve installed on the housing 1, or may be integrally formed in a thinned area of ​​the housing 1. Thus, by providing the pressure relief device 5, when the pressure in the housing 1 exceeds a preset value, the pressure may be released in a directional manner through the pressure relief device 5, thereby improving the reliability of the battery cell 102.

[0322] Exemplarily, the pressure relief device 5 is located on the same side as the pole component 2. Since the pole component 2 is arranged on the first shell wall 111, when the pressure relief device 5 is also arranged on the first shell wall 111, the pressure relief device 5 and the pole component 2 are located on the same side, for example, both are arranged on the top of the battery cell 102, or both are arranged on the bottom of the battery cell 102, or both are arranged on the same side of the battery cell 102, etc. In this way, the design of other shell walls other than the first shell wall 111 can be simplified, and the structure and processing of the battery cell 102 can be simplified. Among them, the shell 1 can be surrounded by multiple non-coplanar walls. For example, the rectangular shell 1 is surrounded by six walls, one of which is the first shell wall 111. The pressure relief device 5 and the pole component 2 are arranged on the same wall, and the two are located on the same side.

[0323] Exemplarily, the pressure relief device 5 and the pole component 2 are located on different sides. Since the pole component 2 is arranged on the first shell wall 111, when the pressure relief device 5 is arranged on other walls of the shell 1 except the first shell wall 111, for example, the end of the shell body opposite to the opening is the first shell wall 111, and the side wall of the shell body adjacent to the opening is the second shell wall, the pressure relief device 5 is arranged on the second shell wall, or the pressure relief device 5 is arranged on the shell cover, then the pressure relief device 5 and the pole component 2 are located on different sides. Therefore, there is no need to consider that the pressure relief device 5 occupies the space of the first shell wall 111 and reduces the volume of the pole component 2, so that the shape and area of ​​the pole component 2 can be flexibly designed as needed. Among them, the shell 1 can be surrounded by a plurality of non-coplanar wall surfaces, for example, a rectangular shell 1 is surrounded by six wall surfaces, one of which is the first shell wall 111, and the pressure relief device 5 is arranged on any other wall surface other than the first shell wall 111, and the pole component 2 is arranged on the first shell wall 111, then the two are located on different sides.

[0324] According to the second aspect of the present application, the present application also provides a battery device 100, including a battery cell 102 of any of the above solutions. It is worth noting that the battery device 100 according to the embodiment of the present application may include a box body 101, or may not include a box body 101. Therefore, since the reliability of the battery cell 102 according to the embodiment of the present application is improved, it is beneficial to improve the performance of the battery device 100.

[0325] Exemplarily, the battery device 100 further includes a busbar component, and the battery cells 102 are multiple and at least two are electrically connected through the busbar component. Thus, the series connection and / or parallel connection of multiple battery cells 102 can be achieved. For example, when multiple battery cells 102 are connected in series, the pole component 2 of the negative electrode of one battery cell 102 is connected to the pole component 2 of the positive electrode of the next battery cell 102 through a busbar component, and at the same time, the pole component 2 of the positive electrode of the battery cell 102 is connected to the pole component 2 of the negative electrode of the previous battery cell 102 through another busbar component.

[0326] For example, in combination Figure 2 The battery device 100 includes a box body 101, a plurality of battery cells 102 are contained in the box body 101, and the bottom of the box body 101 is a box body bottom plate 1013. The pole component 2 is arranged on a side of the housing 1 close to the box body bottom plate 1013, or on a side of the housing 1 away from the box body bottom plate 1013.

[0327] When the battery device 100 is in use, for example, when it is used in a vehicle, the box bottom plate 1013 is located at the bottom of the box 101 in the direction of gravity. Thus, when the pole component 2 is disposed on the side of the housing 1 close to the box bottom plate 1013, it means that the pole component 2 is located at the bottom of the housing 1 in the direction of gravity; and when the pole component 2 is disposed on the side of the housing 1 away from the box bottom plate 1013, it means that the pole component 2 is located at the top of the housing 1 in the direction of gravity. Thus, the relative position of the pole component 2 and the box bottom plate 1013 is not limited, and the orientation of the battery cell 102 and the housing 101 can be flexibly set.

[0328] Among them, when the pole component 2 of the battery cell 102 is arranged on the side of the shell 1 facing the box bottom plate 1013, the battery cell 102 is in an inverted state, and the decompression product is sprayed in the direction away from the passenger compartment, which is safer; when the pole component 2 of the battery cell 102 is arranged on the side of the shell 1 away from the box bottom plate 1013, the battery cell 102 is in an upright state, and the electrolyte is not easy to leak.

[0329] According to the third aspect of the present application, the present application also provides an electric device, including the battery device 100 of any of the above solutions, and the battery device 100 is used to provide electric energy to the electric device. The electric 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, it is beneficial to improve the working power performance of the electric device.

[0330] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0331] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made 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 in that: The invention comprises a shell, an electrode component and a pole component, wherein the electrode component is arranged in the shell, the shell comprises a first shell wall, and the pole component is arranged in the first shell wall and comprises: A pole connected to the electrode component; A clamping structure connected to the first shell wall, the clamping structure surrounds the pole and is insulated and sealed with the pole through an insulating sealing structure, the clamping structure includes a first clamping member and a second clamping member connected and arranged, the first clamping member is bent toward the pole, and forms a clamping groove with the second clamping member for clamping the pole together; The first clamping member includes a first clamping portion bent toward the pole, the first clamping portions are multiple and arranged along the circumference of the pole, and a discontinuity is formed between at least two adjacent first clamping portions.

2. The battery cell according to claim 1, characterized in that: A plurality of the first clamping portions are arranged at intervals along the circumference of the pole, so that the discontinuity is formed between every two adjacent first clamping portions, and a plurality of the discontinuity is arranged at intervals along the circumference of the pole.

3. The battery cell according to claim 2, characterized in that: The pole is a circular structure, and a plurality of the discontinuities are evenly spaced along the circumference of the pole.

4. The battery cell according to claim 2, characterized in that: The pole is a long strip structure, and the first clamping parts are distributed at both ends of the length and both sides of the width of the pole.

5. The battery cell according to claim 4, characterized in that: The pole is a racetrack-shaped structure, which is composed of a rectangle and two arcs located at both ends of the length of the rectangle. The discontinuity is arranged corresponding to the connection position between the rectangle and the arc.

6. The battery cell according to claim 1, characterized in that: The end of the interrupted opening close to the connection position between the first clamping member and the second clamping member is a closed end, the end of the interrupted opening passing through the first clamping member and away from the connection position is an open end, and the width of the interrupted opening at the open end position is greater than the width of the interrupted opening at the closed end position.

7. The battery cell according to claim 6, characterized in that: The width of the discontinuity gradually increases along a direction from the closed end to the open end.

8. The battery cell according to claim 1, characterized in that: The first clamping member includes a surrounding portion, which is connected between the first clamping member and the second clamping member, and the surrounding portion extends along the inward and outward directions of the first shell wall and extends along the circumference of the pole. The first clamping member and the surrounding portion are integral, and are bent and extended relative to the surrounding portion in a direction close to the central axis of the pole. The discontinuity starts from the connection between the surrounding portion and the first clamping member and extends in a direction away from the surrounding portion to penetrate the first clamping member.

9. The battery cell according to claim 1, characterized in that: The first clamping portion has a reinforcing rib protruding in a direction away from the pole.

10. The battery cell according to claim 9, characterized in that: Along the direction in which the first clamping member surrounds the pole, the reinforcing rib is located at the central position of the first clamping portion, and the reinforcing rib extends along the bending track of the first clamping portion.

11. The battery cell according to claim 1, characterized in that: The first clamping member and the second clamping member are an integral piece.

12. The battery cell according to claim 11, characterized in that: The second clamping member is a preformed member and is connected to the first shell wall, and the first clamping member is a riveted formed member.

13. The battery cell according to claim 12, characterized in that: The second clamping member includes a second clamping portion, the second clamping portion cooperates with the first clamping portion to define the clamping groove, and the second clamping portion has a step structure protruding in a direction away from the first clamping portion.

14. The battery cell according to claim 1, characterized in that: The clamping structure comprises a transition body, the transition body and at least one of the first clamping member and the second clamping member are formed as an integral part, and the transition body and the first shell wall are formed as an integral part.

15. The battery cell according to claim 1, characterized in that: The clamping structure comprises a transition body, the transition body is an integral part with at least one of the first clamping member and the second clamping member, and the transition body is assembled and connected with the first shell wall.

16. The battery cell according to claim 1, characterized in that: The first clamping member is arranged on a side of the second clamping member away from the electrode component; The insulating sealing structure comprises: A sealing member, at least a portion of which is clamped between the pole and the second clamping member.

17. The battery cell according to claim 16, characterized in that: The second clamping member includes a second clamping portion that cooperates with the first clamping portion to form the clamping groove, the second clamping portion includes an end portion and a root portion, the end portion is arranged away from the first shell wall relative to the root portion, and at least a portion of the seal is clamped between the root portion and the pole.

18. The battery cell according to claim 17, characterized in that: The seal is also simultaneously clamped between the end and the pole.

19. The battery cell according to claim 17, characterized in that: The sealing member is also clamped between the first clamping member and the pole at the same time, so that at least a portion of the sealing member is located between the connection position of the first clamping member and the second clamping member and the pole.

20. The battery cell according to claim 16, characterized in that: The sealing member is an integral member and further includes a portion clamped between the first clamping portion and the pole.

21. The battery cell according to claim 1, characterized in that: One of the first clamping member and the second clamping member is a preformed member, and the other is a riveted formed member, wherein the preformed member is connected to the first shell wall; The insulating sealing structure comprises: A seal, at least a portion of which is clamped between the pole and the preform.

22. The battery cell according to claim 1, characterized in that: The first clamping member is arranged on a side of the second clamping member away from the electrode component; The insulating sealing structure comprises: An insulating bracket, at least a portion of which is disposed on a side of the second clamping member away from the first clamping member.

23. The battery cell according to claim 22, characterized in that: The clamping structure and the first shell wall are an integral piece, and the insulating bracket is an integral piece and further includes a first extension portion extending to the inner side of the first shell wall.

24. The battery cell according to claim 22, characterized in that: The clamping structure and the first shell wall are separate parts, and the insulating bracket is an integral part and further includes a second extension portion extending between the second clamping part and the pole.

25. The battery cell according to claim 17, characterized in that: The insulating sealing structure includes an insulating bracket, which is an integral part and includes a portion arranged on a side of the second clamping member away from the first clamping member, and a second extension portion extending between the second clamping member and the pole, the second extension portion is clamped between the end portion and the pole, and there is a gap between the second extension portion and the portion of the seal clamped between the root portion and the pole.

26. The battery cell according to claim 1, characterized in that: The first clamping member is arranged on a side of the second clamping member away from the electrode component; The insulating sealing structure comprises: The insulating member includes an inner insulating portion, at least a portion of which is clamped between the pole and the first clamping member.

27. The battery cell according to claim 26, characterized in that: The insulating sealing structure further includes: a sealing member, at least a portion of which is clamped between the pole and the second clamping member, and the hardness of the insulating member is greater than that of the sealing member.

28. The battery cell according to claim 27, characterized in that: The sealing component and the inner insulating part are separate components, and a gap is provided between the sealing component and the inner insulating part.

29. The battery cell according to claim 26, characterized in that: The inner insulating part is injection-molded on the pole.

30. The battery cell according to claim 26, characterized in that The insulating member further comprises: An outer insulating portion, at least a portion of which is wrapped outside the first clamping member.

31. The battery cell according to claim 30, characterized in that: The inner insulating portion is connected to the outer insulating portion.

32. The battery cell according to claim 31, characterized in that: The inner insulating part is connected to the outer insulating part through the discontinuity; And / or, a through hole is formed on the first clamping member, and the inner insulating part is connected to the outer insulating part through the through hole.

33. The battery cell according to claim 31, characterized in that The inner insulating part and the outer insulating part are an integral piece, or the inner insulating part and the outer insulating part are separately formed and assembled and connected.

34. The battery cell according to claim 1, characterized in that The first clamping member is arranged on a side of the second clamping member away from the electrode component; The insulating sealing structure comprises: The insulating member includes an outer insulating portion, at least a portion of which is wrapped outside the first clamping member.

35. The battery cell according to claim 34, characterized in that: A surface of the outer insulating portion on one side away from the electrode component is lower than or flush with a surface of the pole on one side away from the electrode component.

36. The battery cell according to claim 34, characterized in that The outer insulating portion includes an embedded portion sandwiched between an outer peripheral surface of the pole and an inner peripheral surface of the first clamping member.

37. The battery cell according to claim 34, characterized in that The outer insulating portion also fills the discontinuity.

38. The battery cell according to claim 1, characterized in that The pole component further includes a reinforcing sheet, which is disposed between the first clamping piece and a portion of the insulating sealing structure clamped between the first clamping piece and the pole, and is bent into a shape matching the first clamping piece.

39. The battery cell according to any one of claims 1 to 38, characterized in that: The pole includes a first metal part and a second metal part made of different materials. The first metal part is located on a side of the second metal part away from the electrode component. The second metal part is connected to the electrode component. The periphery of the first metal part and the periphery of the second metal part adjacent to the first metal part are both covered with a protective metal layer.

40. The battery cell according to any one of claims 1 to 38, characterized in that: The insulating sealing structure comprises: An insulating bracket, at least a portion of which is arranged on a side of the clamping structure close to the electrode component, the pole includes an inner convex portion located in an inner ring area of ​​the insulating bracket, the inner convex portion protrudes toward the electrode component relative to the clamping structure, and a side surface of the inner convex portion close to the electrode component is flush with a side surface of the insulating bracket close to the electrode component.

41. The battery cell according to any one of claims 1 to 38, characterized in that: The pole component defines a receiving groove that is recessed in a direction away from the electrode component, and the pole defines a groove end wall on a side of the receiving groove away from the electrode component. The electrode component is electrically connected to the pole through a conductive portion, and at least a portion of the conductive portion is received in the receiving groove and connected to the groove end wall.

42. The battery cell according to any one of claims 1 to 38, characterized in that: It also includes a pressure relief device, which is arranged on the shell and is located on the same side or the opposite side as the pole component.

43. A battery device, characterized in that: Comprising a battery cell according to any one of claims 1-42.

44. The battery device according to claim 43, characterized in that The battery device comprises a box body, the battery cells are multiple and are accommodated in the box body, the bottom of the box body is a box body bottom plate, and the pole component is arranged on a side of the shell body close to the box body bottom plate, or on a side of the shell body away from the box body bottom plate.

45. An electrical device, characterized in that: Comprising a battery device according to claim 43 or 44.

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