Button cell and electronic equipment

Abstract

The utility model provides a button cell and electronic equipment. The button cell comprises: a top cover having a first through hole; the pole is installed in the first through hole, the pole comprises a first pole body and a second pole body, and a first protruding part is arranged on the side, facing the second pole body, of the first pole body; the first lug boss is provided with a first end part close to the second pole body and a second end part far away from the second pole body; the first pole body is provided with the first protruding part, the first protruding part is provided with the first end part and the second end part, the riveting groove is defined between the first pole body and the second end part, and at least part of the second pole body is located in the riveting groove, so that the second pole body can be riveted with the first pole body; meanwhile, the cross sectional area of the second end part is larger than that of the first end part, and the cross sectional area of the second end part is gradually reduced along the direction deviating from the first end part, so that the second end part can be tightly attached to the first pole body, and the first pole body and the second pole body are firmly fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a button battery and electronic equipment. Background Art

[0002] In the related technology, button batteries are widely used in various electronic products, such as watches, calculators, remote controls, etc., and have the advantages of small size, large capacity, and easy use.

[0003] Button batteries include an upper pole and a lower pole. Usually, the upper pole and the lower pole are cylindrical in shape. Since the upper pole and the lower pole are cylindrical, the connection between the upper pole and the lower pole is easy to loosen, causing leakage in the button battery, affecting the performance of the battery, and causing serious safety hazards. Utility Model Content

[0004] The embodiments of the utility model provide a button-type battery and an electronic device, which can improve the technical problem that the connection between the upper pole and the lower pole is easily loosened.

[0005] In a first aspect, an embodiment of the present utility model provides a button-type battery, the button-type battery comprising:

[0006] A top cover, wherein the top cover has a first through hole;

[0007] A pole, the pole is installed in the first through hole, the pole comprises a first pole body and a second pole body, and a first protrusion is provided on a side of the first pole body facing the second pole body;

[0008] The first protrusion has a first end portion close to the second pole body and a second end away from the second pole body, a rivet groove is defined between the first end portion and the second pole body, the second pole body is at least partially located in the rivet groove, and the cross-sectional area of ​​the second end portion gradually decreases in a direction away from the first end portion;

[0009] The ratio of the length of the cross section of the second end portion to the length of the cross section of the first end portion is 1:1.1-2.4.

[0010] In some embodiments, the first pole body has a first cylindrical portion close to the second pole body, and the first cylindrical portion is at least partially located in the rivet groove.

[0011] In some embodiments, the second end portion has an inclined surface facing away from the first end portion, the first barrel portion has a second through hole, and the inclined surface fits the second through hole.

[0012] In some embodiments, the button battery further includes injection molding glue, one end of the injection molding glue is connected to the first pole column, and the other end of the injection molding glue is connected to the second pole column.

[0013] In some embodiments, the button battery also includes a shell, the shell having an opening portion and a cylindrical portion, the inner diameter of the opening portion is larger than the inner diameter of the cylindrical portion, and a step portion is provided at the junction of the opening portion and the cylindrical portion; the edge of the top cover is provided with a bending portion, the bending portion abuts against the opening portion and the step portion, and is in an elastic deformation state in the abutting direction of the bending portion and the opening portion.

[0014] In some embodiments, the bending portion includes a first straight segment, a second straight segment and a first curved segment, a first curved segment is arranged between the first straight segment and the second straight segment, the first straight segment or the second straight segment abuts against the opening portion, and the first curved segment abuts against the step portion.

[0015] In some embodiments, a ratio of a length of the first straight segment to a length of the first curved segment is 0.8-50:1; and / or a ratio of a radius of the top cover to a width of the first curved segment is 100-1500:1.

[0016] In some embodiments, the button battery further includes a winding core, the cylinder body has a receiving cavity, and the winding core is disposed in the receiving cavity.

[0017] In some embodiments, the winding core includes a negative electrode sheet, a separator, and a positive electrode sheet which are stacked and wound in sequence.

[0018] In some embodiments, the height of the positive electrode sheet is smaller than the height of the negative electrode sheet, and the height of the negative electrode sheet is smaller than the height of the separator.

[0019] In a second aspect, an embodiment of the present utility model provides an electronic device, comprising the above-mentioned button battery.

[0020] Beneficial effects of the embodiments of the utility model:

[0021] In an embodiment of the utility model, a top cover and a pole are provided, the top cover has a first through hole, the pole includes a first pole body and a second pole body, the first pole body is provided with a first protrusion, the first protrusion has a first end and a second end, a rivet groove is defined between the first pole body and the second end, the second pole body is at least partially located in the rivet groove, so that the second pole body and the first pole body can be riveted, and at the same time, the cross-sectional area of ​​the second end is larger than the cross-sectional area of ​​the first end, and the cross-sectional area of ​​the second end gradually decreases in a direction away from the first end, so that the second end can be tightly fitted with the first pole body, so that the first pole body and the second pole body are firmly fixed, and no leakage occurs, thereby ultimately ensuring the practical safety of the button battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of a first pole column, a second pole column and a top cover provided in an embodiment of the utility model;

[0024] Figure 2 is a schematic diagram of a second pole column provided in an embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of a first pole body provided in an embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of a first pole column, a second pole column, an injection molded adhesive and a top cover provided in an embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of a first pole column, a second pole column, injection molding, a top cover and a shell;

[0028] Figure 6 is a schematic diagram of a housing provided by an embodiment of the utility model;

[0029] Figure 7 yes Figure 6 A partial enlarged view of the middle A area;

[0030] Figure 8 is a schematic diagram of a top cover provided by an embodiment of the utility model;

[0031] Fig. 9 yes Figure 8 A partial enlarged view of the middle B area;

[0032] Fig.10 It is a schematic diagram of a housing and a winding core provided in an embodiment of the utility model;

[0033] Fig.11 is a schematic diagram of a winding core provided in an embodiment of the utility model;

[0034] Fig.12 It is a schematic diagram of a shell, a top cover, a first pole column, a second pole column, an injection molding adhesive and a winding core provided in an embodiment of the utility model.

[0035] In the figure:

[0036] 10-top cover, 11-bending portion, 111-first straight section, 112-second straight section, 113-first curved section, 101-first through hole, 20-pole, 21-second pole, 211-first end, 212-second end, 2121-inclined surface, 213-rivet groove, 22-first pole, 221-first barrel portion, 2211-second through hole, 30-injection molding, 40-shell, 41-opening portion, 42-second barrel portion, 421-accommodating cavity, 43-step portion, 50-winding core, 51-negative electrode sheet, 52-diaphragm, 53-positive electrode sheet, 60-positive electrode ear, 70-negative electrode ear, 80-insulating tape. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. In order to enable any technician in the field to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the utility model with unnecessary details. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0040] Figure 1 It is a schematic diagram of a first pole column, a second pole column and a top cover provided in an embodiment of the utility model; Figure 2 is a schematic diagram of a second pole column provided in an embodiment of the utility model; Figure 3 Schematic diagram of the first pole body provided by the embodiment of the utility model. Figures 1 to 3 The present application provides a button battery, which comprises: a top cover 10 and a pole 20. The top cover 10 has a first through hole 101. The pole 20 is installed in the first through hole 101. The pole 20 comprises a first pole body 22 and a second pole body 21, and a first protrusion is provided on a side of the first pole body 22 facing the second pole body 21; the first protrusion has a first end 211 close to the second pole body 21, and a second end 212 away from the second pole body 21.

[0041] Among them, the cross-sectional area of ​​the second end 212 is larger than the cross-sectional area of ​​the first end 211, a rivet groove 213 is defined between the first pole body 22 and the second end 212, the second pole body 21 is at least partially located in the rivet groove 213, and the cross-sectional area of ​​the second end 212 gradually decreases in the direction away from the first end 211.

[0042] The ratio of the length of the cross section of the second end 212 to the length of the cross section of the first end 211 is 1:1.1-2.4. For example, the ratio of the length of the cross section of the second end 212 to the length of the cross section of the first end 211 may be 1:1.3, 1:1.5, 1:1.8, 1:1.9, or 1:2.3.

[0043] In some embodiments of the present application, the material of the second pole 21 is steel, and the material of the first pole 22 is aluminum. Since the material of the first pole 22 has certain plasticity and flexibility, the first pole 22 can be buckled on the second pole 21. At the same time, since the length of the cross section of the second end 212 is greater than the length of the cross section of the first end 211, and the material of the first pole 22 has certain plasticity and flexibility, the first pole 22 can ensure that the shape of the first pole 22 does not deform or deforms very little after the second end 212 enters. Moreover, when the ratio of the length of the cross section of the second end 212 to the length of the cross section of the first end 211 is 1:1.1~2.4, the deformation between the first pole 22 and the second pole 21 can be minimized.

[0044] In some embodiments of the present application, the reverse buckle can be made by riveting, riveting and other processes.

[0045] In some embodiments of the present application, the button battery is round or oval in shape.Button batteries are widely used in various portable electronic devices, such as watches, calculators, remote controls, electronic dictionaries, electronic door locks, toys, etc.

[0046] In some embodiments of the present application, the shape of the top cover 10 may be circular or elliptical.

[0047] In some embodiments of the present application, the first pole body 22 may be an upper pole body, the second pole body 21 may be a lower pole body, and the first pole body 22 and the second pole body 21 may be obtained by integral molding.

[0048] In some embodiments of the present application, the material of the top cover 10 , the first pole body 22 , and the second pole body 21 may be stainless steel, copper, or aluminum.

[0049] In some embodiments of the present application, by setting a top cover 10 and a pole 20, the top cover 10 has a first through hole 101, the pole 20 includes a first pole body 22 and a second pole body 21, the first pole body 22 is provided with a first protrusion, the first protrusion has a first end 211 and a second end 212, a rivet groove 213 is defined between the first pole body 22 and the second end 212, the second pole body 21 is at least partially located in the rivet groove 213, so that the second pole body 21 and the first pole body 22 can be riveted, and at the same time, the cross-sectional area of ​​the second end 212 is greater than the cross-sectional area of ​​the first end 211, and the cross-sectional area of ​​the second end 212 gradually decreases in a direction away from the first end 211, so that the second end 212 can be tightly fitted on the first pole body 22, so that the first pole body 22 and the second pole body 21 are firmly fixed, and there will be no leakage, which ultimately ensures the practical safety of the button battery.

[0050] In some embodiments of this application, please refer to Figures 1 to 3 The first pole body 22 has a first barrel portion 221 close to the second pole body 21 , and the first barrel portion 221 is at least partially located in the rivet groove 213 .

[0051] In some embodiments of the present application, the first barrel portion 221 is at least partially located in the rivet groove 213, so that the first pole body 22 is engaged with the second pole body 21, which can improve the connection stability between the first pole body 22 and the second pole body 21 and prevent the second pole body 21 and the first pole body 22 from loosening easily.

[0052] In some embodiments of this application, please refer to Figures 1 to 3 The second end portion 212 has an inclined surface 2121 along a direction away from the first end portion 211 , the first cylindrical portion 221 has a second through hole 2211 , and the inclined surface 2121 fits the second through hole 2211 .

[0053] In some embodiments of the present application, the first barrel portion 221 has a second through hole 2211, and the size of the second through hole 2211 gradually decreases in a direction away from the first end portion 211. The second through hole 2211 fits the inclined surface 2121, so that the gap between the first pole column 22 and the second pole column 21 is reduced, thereby further improving the sealing performance of the button battery.

[0054] In some embodiments of the present application, the first barrel portion 221 has an inner convex portion along the edge portion in the direction close to the first end portion 211, and the inner convex portion cooperates with the rivet groove 213. Further, the inner convex portion is connected to the second through hole 2211, and since the material of the second end portion 212 is flexible, the second end portion 212 can enter the second through hole 2211 from the inner convex portion.

[0055] In some embodiments of the present application, Figure 4 Schematic diagram of the first pole body, the second pole body, the injection molding glue and the top cover provided by the embodiment of the utility model. Figures 1 to 4 The button battery also includes a plastic injection glue 30 , one end of the plastic injection glue 30 is connected to the first pole body 22 , and the other end of the plastic injection glue 30 is connected to the second pole body 21 .

[0056] In some embodiments of the present application, the shape of the injection molding glue 30 is circular or oval. The injection molding glue 30 can be waterproof and dustproof, prevent the button battery from being damaged, and extend the service life of the button battery.

[0057] Figure 5 It is a schematic diagram of a first pole column, a second pole column, injection molding, a top cover and a shell; Figure 6 is a schematic diagram of a housing provided by an embodiment of the utility model; Figure 7 yes Figure 6 A partial enlarged view of the middle A area; Figure 8is a schematic diagram of a top cover provided by an embodiment of the utility model; please refer to Figures 5 to 8 The present application provides a button-type battery, which comprises: a shell 40 and a top cover 10. The shell 40 has an opening 41 and a second barrel 4, the inner diameter of the opening 41 is larger than the inner diameter of the second barrel 42, and a step 43 is provided at the junction of the opening 41 and the second barrel 4. The edge of the top cover 10 is provided with a bending portion 11, the bending portion 11 abuts against the opening 41 and the step 43, and is in an elastic deformation state in the abutment direction of the bending portion 11 and the opening 41.

[0058] In some embodiments of the present application, the length A1 of the cross section of the second end 212 is 1.50-2.70 mm. The length A2 of the cross section of the first end 211 is 1.30-2.50 mm. The difference A3 between the length of the cross section of the second end 212 and the length of the cross section of the first end 211 is 0.07-0.13 mm. Since the distance A3 is short, when the first pole 22 is connected to the second pole 21, the deformation of the first pole 22 can be small, and the sealing of the first pole 22 and the second pole 21 can be ensured to be good.

[0059] In some embodiments of this application, please refer to Figures 5 to 8 The inner diameter of the opening portion 41 is larger than the inner diameter of the second cylindrical portion 42. Here, the inner diameter of the opening portion 41 is slightly larger than the inner diameter of the second cylindrical portion 42. For example, the length of the inner diameter of the opening portion 41 can be less than or equal to 1.05 times the inner diameter of the second cylindrical portion 42.

[0060] In some embodiments of this application, please refer to Figures 5 to 8 The shape of the bending portion 11 can be U-shaped.

[0061] In some embodiments of this application, please refer to Figures 5 to 8 By setting a shell 40 and a top cover 10, the shell 40 has an opening portion 41 and a second cylindrical portion 42, and a step portion 43 is provided at the junction of the opening portion 41 and the second cylindrical portion 42, and the top cover 10 has a bending portion 11, the bending portion 11 abuts against the opening portion 41 and the step portion 43, and is in an elastic deformation state in the abutting direction of the bending portion 11 and the opening portion 41, so that the top cover 10 will not leak after liquid is injected, and the performance of the battery is effectively guaranteed, and finally the safety of battery use is ensured.

[0062] In some embodiments of the present application, Fig. 9 yes Figure 8 A partial enlarged view of area B in the middle. Please refer to Figures 5 to 9The bending portion 11 includes a first straight segment 111, a second straight segment 112 and a first curved segment 113. The first curved segment 113 is arranged between the first straight segment 111 and the second straight segment 112. The first straight segment 111 or the second straight segment 112 abuts against the opening portion 41, and the first curved segment 113 abuts against the step portion 43.

[0063] In some embodiments of this application, please refer to Figures 5 to 9 The first straight section 111 or the second straight section 112 abuts against the opening 41, and the housing 40 has a limiting effect on the top cover 10 in the left-right direction. The first curved section 113 abuts against the step 43, and the housing 40 has a limiting effect on the top cover 10 in the left-right direction.

[0064] In one example, when the first straight line abuts against the opening 41 , the first curved section 113 will be elastically deformed, so that the first straight section 111 is in close contact with the opening 41 .

[0065] In another example, when the second straight section 112 abuts against the opening 41 , the first curved section 113 will be elastically deformed, so that the second straight section 112 is tightly abutted against the opening 41 .

[0066] In some embodiments of the present application, the length of the first straight segment 111 or the second straight segment 112 is adapted to the length of the opening 41 , which can ensure that the first straight segment 111 or the second straight segment 112 is in full contact with the opening 41 , thereby achieving a better abutment effect.

[0067] In some embodiments of this application, please refer to Figures 5 to 9 , the ratio of the length of the first straight section 111 to the length of the first curved section 113 is 0.8 to 50:1. The ratio of the radius of the top cover 10 to the width of the first curved section 113 is 100 to 1500:1. Specifically, the length of the first straight section 111 is 0.2-1.5mm. The length of the first curved section 113 is 0.03-0.3mm. The radius of the top cover 10 is 1.5-13mm. The width of the first curved section 113 is 0.01-0.1mm. For example, the length of the first straight section 111 is 0.5mm, 0.7mm, and 0.9mm. The length of the first curved section 113 is 0.05mm, 0.07mm, and 0.09mm. The radius of the top cover 10 is 5mm, 7mm, and 9mm. The width of the first curved section 113 is 0.05mm, 0.07mm, and 0.09mm.

[0068] In some embodiments of the present application, the first straight segment 111 and the second straight segment are in full contact with the opening 41 , which can provide a more stable connection and reduce the possibility of poor contact or looseness.

[0069] In some embodiments of the present application, the first curved section 113 is in full contact with the step portion 43 , which can provide a more stable connection and reduce the possibility of poor contact or looseness.

[0070] In some embodiments of the present application, the radius of the top cover 10 is in the range of 1.5-13 mm, which can make the button battery more compact and small, and suitable for space-constrained devices.

[0071] In some embodiments of the present application, Fig.10 It is a schematic diagram of a housing and a winding core provided in an embodiment of the utility model; Fig.11 Schematic diagram of the winding core provided by the embodiment of the utility model. Figure 10 to Figure 11 The button battery further includes a winding core 50 , the cylinder body has a receiving cavity 421 , and the winding core 50 is disposed in the receiving cavity 421 .

[0072] In some embodiments of the present application, the winding core 50 plays a key role in storing and releasing energy in the button battery.

[0073] In some embodiments of this application, please refer to Figure 10 to Figure 11 The winding core 50 includes a negative electrode sheet 51 , a separator 52 , and a positive electrode sheet 53 which are stacked and wound in sequence.

[0074] In some embodiments of the present application, the negative electrode sheet 51 is a pole from which current flows out when the battery is discharged, and is made of materials such as metal or graphite. The separator 52 is an insulating material used to separate the negative electrode sheet 51 and the positive electrode sheet 53 to prevent short circuit. The positive electrode sheet 53 is a pole from which current flows when the battery is discharged, and is made of metal oxide.

[0075] In some embodiments of the present application, the negative electrode sheet 51, the separator 52 and the positive electrode sheet 53 are first stacked together in sequence. Then, the stacked materials are wound to form a cylindrical structure. The winding process allows the positive and negative electrode sheets 51 to maintain good contact and provides sufficient surface area to promote electrochemical reactions.

[0076] In some embodiments of this application, please refer to Figure 10 to Figure 11 , the height of the positive electrode sheet 53 is smaller than the height of the negative electrode sheet 51 , and the height of the negative electrode sheet 51 is smaller than the height of the separator 52 .

[0077] In some embodiments of the present application, the height of the separator 52 is greater than the negative electrode sheet 51 and the positive electrode sheet 53, so as to ensure that there is enough distance between the negative electrode sheet 51 and the positive electrode sheet 53 to prevent them from directly contacting each other during the charging and discharging process. At the same time, the height of the separator 52 also provides enough space to accommodate the electrolyte and promote the electrochemical reaction.

[0078] In some embodiments of the present application, Fig.12Schematic diagram of the housing, top cover, first pole column, second pole column, injection molding and winding core provided by the embodiment of the utility model. Figures 1 to 12 A first gap is formed between every two layers of the diaphragm 52, and a second gap is formed by removing the space of the winding core 50 from the accommodating cavity 421. The electrolyte is filled in the first gap and the second gap. In the first gap, the electrolyte can fully contact the positive and negative electrode sheets 51 to promote the transfer of charge and the electrochemical reaction. In the second gap, the electrolyte provides additional electrolyte storage space, which helps to maintain the normal operation of the button battery. At the same time, injecting the electrolyte into the shell 40 first and then covering it with the top cover 10 can avoid the opening of additional injection holes, reduce the manufacturing process, and at the same time ensure the integrity of the battery cell and improve the overall mechanical properties of the battery cell.

[0079] In some embodiments of this application, please refer to Fig.12 The button cell further includes a positive electrode tab 60 and a negative electrode tab 70, which are respectively arranged on opposite sides of the winding core 50. The positive electrode tab 60 is located on the positive electrode sheet 53 of the winding core 50, and the insulating tape 80 is located on the diaphragm 52, and the positive electrode tab 60 is arranged on the insulating tape 80. One end of the negative electrode tab 70 is located on the negative electrode sheet 51, and the other end is located between the bent portion 11 and the opening 41.

[0080] In some embodiments of the present application, the shape of the opening portion 41 is circular; and / or the shape of the second barrel portion 42 is circular.

[0081] In some embodiments of the present application, the shape of the opening 41 may be circular. In other embodiments, the shape of the opening 41 may be rectangular, triangular, or pentagonal.

[0082] In some embodiments of the present application, the shape of the second barrel portion 42 may be circular. In other embodiments, the shape of the second barrel portion 42 may be rectangular, triangular, or pentagonal.

[0083] Furthermore, in order to better implement the button battery in the embodiments of the present application, based on the button battery, the present application also provides an electronic device, which includes the button battery as described in any of the above embodiments.

[0084] In some embodiments of the present application, a top cover and a pole are provided, the top cover has a first through hole, the pole includes a first pole body and a second pole body, the first pole body is provided with a first protrusion, the first protrusion has a first end and a second end, a rivet groove is defined between the first pole body and the second end, the second pole body is at least partially located in the rivet groove, so that the second pole body and the first pole body can be riveted, and at the same time, the cross-sectional area of ​​the second end is greater than the cross-sectional area of ​​the first end, and the cross-sectional area of ​​the second end gradually decreases in a direction away from the first end, so that the second end can be tightly fitted to the first pole, so that the first pole body and the second pole body are firmly fixed, and no leakage occurs, thereby ultimately ensuring the practical safety of the button battery.

[0085] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0086] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0087] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0088] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more utility model embodiments, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0089] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0090] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the accompanying materials of this application are inconsistent or conflicting with the content described in this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

[0091] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A button battery, characterized in that: The button battery comprises: A top cover (10), wherein the top cover (10) has a first through hole (101); A pole (20), the pole (20) being installed in the first through hole (101), the pole (20) comprising a first pole body (22) and a second pole body (21), the first pole body (22) being provided with a first protrusion on a side facing the second pole body (21); The first protrusion has a first end (211) close to the second pole body (21), and a second end (212) away from the second pole body (21); The cross-sectional area of ​​the second end portion (212) is greater than the cross-sectional area of ​​the first end portion (211); a rivet groove (213) is defined between the first pole body (22) and the second end portion (212); the second pole body (21) is at least partially located in the rivet groove (213); and the cross-sectional area of ​​the second end portion (212) gradually decreases in a direction away from the first end portion (211); The ratio of the length of the cross section of the second end (212) to the length of the cross section of the first end (211) is 1:1.1-2.

4.

2. The button battery according to claim 1, characterized in that: The first pole body (22) has a first barrel portion (221) close to the second pole body (21), and the first barrel portion (221) is at least partially located in the rivet groove (213).

3. The button battery according to claim 2, characterized in that: The second end portion (212) has an inclined surface (2121) which is away from the first end portion (211), the first cylindrical portion (221) has a second through hole (2211), and the inclined surface (2121) fits the second through hole (2211).

4. The button battery according to claim 1, characterized in that: The button cell further comprises a plastic injection glue (30), one end of the plastic injection glue (30) is connected to the first pole column (22), and the other end of the plastic injection glue (30) is connected to the second pole column (21).

5. The button battery according to any one of claims 1 to 4, characterized in that: The button battery further comprises a shell (40), wherein the shell (40) comprises an opening (41) and a second cylindrical portion (42), wherein the inner diameter of the opening (41) is greater than the inner diameter of the second cylindrical portion (42), and a step portion (43) is provided at the junction of the opening (41) and the second cylindrical portion (42); The edge of the top cover (10) is provided with a bent portion (11); The bent portion (11) abuts against the opening portion (41) and the step portion (43), and is in an elastically deformed state in the abutting direction between the bent portion (11) and the opening portion (41).

6. The button cell according to claim 5, characterized in that: The bent portion (11) comprises a first straight section (111), a second straight section (112) and a first curved section (113); the first curved section (113) is arranged between the first straight section (111) and the second straight section (112); the first straight section (111) or the second straight section (112) abuts against the opening portion (41); and the first curved section (113) abuts against the step portion (43).

7. The button cell according to claim 6, characterized in that: The ratio of the length of the first straight section (111) to the length of the first curved section (113) is 0.8-50:1; and / or The ratio of the radius of the top cover (10) to the width of the first curved section (113) is 100-1500:

1.

8. The button battery according to claim 5, characterized in that: The button-type battery further comprises a winding core (50); the second cylindrical portion (42) has a receiving cavity (421); and the winding core (50) is arranged in the receiving cavity (421).

9. The button cell according to claim 8, characterized in that: The winding core (50) comprises a negative electrode sheet (51), a separator (52) and a positive electrode sheet (53) which are stacked and wound in sequence; The height of the positive electrode sheet (53) is smaller than the height of the negative electrode sheet (51), and the height of the negative electrode sheet (51) is smaller than the height of the separator (52).

10. An electronic device, characterized in that: Comprising a button battery as described in any one of claims 1 to 9.

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