Cover plate structure for button cell and button cell

Abstract

The utility model provides a cover plate structure for a button cell and the button cell. The first cover plate comprises a first upper cover plate, a first connecting column and a first lower cover plate, one end of one side wall of the first upper cover plate is connected with one end of the first connecting column, and one end of one side wall of the first lower cover plate is connected with the other end of the first connecting column. The second cover plate comprises a second upper cover plate, a second connecting column and a second lower cover plate, one end of one side wall of the second upper cover plate is connected with one end of the second connecting column, and one end of one side wall of the second lower cover plate is connected with the other end of the first connecting column. The first cover plate and the second cover plate are in insulated sealing connection through the insulated sealing assembly, so that the positive and negative electrode lugs of the battery cell in the button cell can be connected to the same side of the cover plate structure, the height space of the battery cell in the shell is increased, the energy density of the battery cell can be effectively improved, and the energy density of the battery is further improved.

Description

Technical Field

[0001] The present disclosure relates to the field of batteries, and in particular to a cover plate structure for a button battery and a button battery. Background Art

[0002] Steel case button cell is a common battery design, usually used in applications such as lithium-ion batteries and lithium polymer batteries. Steel case button cell is compact, lightweight, and has a high energy density, so it is suitable for use in portable devices such as mobile phones, laptops, tablets, etc., providing convenient energy support. Steel case button cell is efficient, portable, and reliable, so it is suitable for a variety of electronic devices and application scenarios, providing important energy support for modern life and industrial production.

[0003] To this end, the Chinese patent with patent number CN113809486A proposes a steel shell button battery. The above-mentioned steel shell button battery includes a top cover assembly, a battery cell assembly, a bottom shell and a sealing cover. The bottom shell is provided with a receiving cavity, a placement port and a liquid injection port. The placement port is connected to one side of the receiving cavity, and the liquid injection port is connected to the side of the receiving cavity away from the placement port. The diameter of the liquid injection port is smaller than the diameter of the placement port. The battery cell assembly is placed in the receiving cavity, the top cover assembly is covered on the placement port, and the sealing cover is covered on the liquid injection port. The above-mentioned steel shell button battery has good sealing performance, can effectively prevent liquid leakage and is easy to weld.

[0004] Although the technical solution of the above patent can better seal the steel shell button battery, prevent leakage and facilitate welding, it also has the following problems:

[0005] The positive pole ear of the steel shell button battery is welded to the upper cover plate, and the negative pole ear is welded to the lower shell, resulting in the positive and negative pole ears being on opposite sides of each other, that is, the positive and negative pole ears are distributed at the upper and lower ends of the steel shell button battery, so that the positive and negative pole ears occupy more space at the height of the battery cell, which will undoubtedly lose the battery cell ED (energy density), thereby resulting in a lower energy density of the battery. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a cover structure for button-type batteries that can improve the energy density of the battery.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A cover plate structure for a button battery, comprising:

[0009] A first cover plate, the first cover plate comprising a first upper cover plate, a first connecting column and a first lower cover plate, one end of a side wall of the first upper cover plate is connected to one end of the first connecting column, and one end of a side wall of the first lower cover plate is connected to the other end of the first connecting column;

[0010] A second cover plate, the second cover plate comprising a second upper cover plate, a second connecting column and a second lower cover plate, one end of a side wall of the second upper cover plate is connected to one end of the second connecting column, and one end of a side wall of the second lower cover plate is connected to the other end of the second connecting column;

[0011] One side of the first connecting column is insulated and sealedly connected to a side wall of the second upper cover plate, the other side of the first connecting column is insulated and sealedly connected to a side wall of the second lower cover plate, one side of the second connecting column is insulated and sealedly connected to a side wall of the first upper cover plate, the other side of the second connecting column is insulated and sealedly connected to a side wall of the first lower cover plate, one side wall of the first upper cover plate is insulated and sealedly connected to a side wall of the second upper cover plate, and one side wall of the first lower cover plate is insulated and sealedly connected to a side wall of the second lower cover plate, so that the first cover plate is insulated and sealedly connected to the second cover plate.

[0012] In one embodiment, a first filling cavity is formed between a side wall of the first upper cover plate and a side wall of the second upper cover plate;

[0013] A second filling cavity is formed between the bottom surface of the first upper cover plate, the bottom surface of the second upper cover plate, the top surface of the first lower cover plate, and the top surface of the second lower cover plate;

[0014] A third filling cavity is formed between a side wall of the first lower cover plate and a side wall of the second lower cover plate;

[0015] The second filling cavity is communicated with the first filling cavity and the third filling cavity respectively.

[0016] In one embodiment, the cover structure for the button battery also includes an insulating sealing component, which includes an insulating sealing block, a first insulating sealing layer, a second insulating sealing layer, a third insulating sealing layer and a fourth insulating sealing layer. The insulating sealing blocks are respectively filled in the first filling cavity, the second filling cavity and the third filling cavity, one side of the first connecting column is bonded to a side wall of the second upper cover plate through the first insulating sealing layer, the other side of the first connecting column is bonded to a side wall of the second lower cover plate through the second insulating sealing layer, one side of the second connecting column is bonded to a side wall of the first upper cover plate through the third insulating sealing layer, and the other side of the second connecting column is bonded to a side wall of the first lower cover plate through the fourth insulating sealing layer, so that the first cover plate is insulated and sealed with the second cover plate.

[0017] In one embodiment, the first cover plate and the second cover plate are both integrally stamped structures.

[0018] In one embodiment, the first upper cover plate, the first lower cover plate, the second upper cover plate and the second lower cover plate are all semicircular cover plates.

[0019] In one of the embodiments, a vertical height between a bottom surface of the first upper cover plate and a bottom surface of the first lower cover plate is 0.15 mm-0.25 mm.

[0020] The vertical height between the bottom surface of the second upper cover plate and the bottom surface of the second lower cover plate is 0.15 mm-0.25 mm.

[0021] In one embodiment, the width of the first connecting column and the second connecting column is 0.5 mm-2 mm.

[0022] In one embodiment, the thickness of the first lower cover plate and the second lower cover plate is 0.1 mm-0.2 mm.

[0023] A button battery, comprising a cover plate structure, a shell, a battery cell, a first pole ear and a second pole ear for the button battery;

[0024] The cover plate structure is sealed and connected to the opening of the shell, the battery cell is arranged in the shell, one end of the first pole ear and one end of the second pole ear are connected to the same side of the battery cell, the other end of the first pole ear is connected to the bottom surface of the first lower cover plate, and the other end of the second pole ear is connected to the bottom surface of the second lower cover plate.

[0025] In one of the embodiments, it also includes an insulating sealing ring adhesive layer, and the other side wall periphery of the first upper cover plate, the other side periphery of the first lower cover plate, the other side wall periphery of the second upper cover plate and the other side periphery of the second lower cover plate are all bonded to the shell through the insulating sealing ring adhesive layer.

[0026] In one of the embodiments, the shell is provided with a liquid-filled cavity, the battery cell is arranged in the liquid-filled cavity, and the liquid-filled cavity is used to be filled with electrolyte.

[0027] Compared with the prior art, the utility model has at least the following advantages:

[0028] By making the first upper cover plate and the first lower cover plate in the first cover plate respectively connected to the two ends of the first connecting column, and the second upper cover plate and the second lower cover plate in the second cover plate respectively connected to the two ends of the second connecting column, the first upper cover plate and the first lower cover plate in the first cover plate form a staggered connection, and the second upper cover plate and the second lower cover plate in the second cover plate form a staggered connection, that is, when the cover plate structure is applied to a button battery, the first cover plate and the second cover plate can be located on the same side of the battery, and at the same time, the first cover plate and the second cover plate are insulated and sealed, and the first upper cover plate and the second lower cover plate are both used to connect the pole ears, so that the positive and negative pole ears of the button battery cell can be located on the same side, saving the space occupied by the height of the battery cell pole ears in the shell, thereby effectively improving the energy density of the battery cell, and then effectively improving the energy density of the button battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, 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 disclosure 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.

[0030] Figure 1 This is a schematic structural diagram of a cover plate structure in one embodiment;

[0031] Figure 2 for Figure 1 A structural schematic diagram of the cover plate structure from another perspective;

[0032] Figure 3 for Figure 1 The schematic diagram of the structure of the cover plate structure shown is when the insulating sealing component is not filled;

[0033] Figure 4 for Figure 3 A schematic structural diagram of another perspective when the cover plate structure is not filled with an insulating sealing component;

[0034] Figure 5 for Figure 3 A schematic diagram of a partial structure of the cover plate structure shown;

[0035] Figure 6 for Figure 3 A schematic diagram of a partial structure of the cover plate structure shown;

[0036] Figure 7 for Figure 1 A top view of the cover plate structure shown;

[0037] Figure 8 for Figure 7 The enlarged schematic diagram of point A is shown;

[0038] Fig. 9 for Figure 7 The enlarged schematic diagram of point B is shown;

[0039] Fig.10 for Figure 1 A bottom view of the cover plate structure shown;

[0040] Fig.11 for Fig.10 An enlarged schematic diagram of point C is shown;

[0041] Fig.12 for Fig.10 An enlarged schematic diagram of point D is shown;

[0042] Fig.13 Schematic diagram of the structure of a button battery in one embodiment. DETAILED DESCRIPTION

[0043] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0046] See also Figures 1 to 12 In order to better understand the cover structure 10 for the button battery disclosed in the present invention, the following further explanation is given:

[0047] The cover plate structure 10 for a button cell of one embodiment includes a first cover plate 100 and a second cover plate 200. The first cover plate 100 includes a first upper cover plate 110, a first connecting column 120 and a first lower cover plate 130, one end of a side wall of the first upper cover plate 110 is connected to one end of the first connecting column 120, and one end of a side wall of the first lower cover plate 130 is connected to the other end of the first connecting column 120. The second cover plate 200 includes a second upper cover plate 210, a second connecting column 220 and a second lower cover plate 230, one end of a side wall of the second upper cover plate 210 is connected to one end of the second connecting column 220, and one end of a side wall of the second lower cover plate 230 is connected to the other end of the second connecting column 220. One side of the first connecting column 120 is insulated and sealedly connected to a side wall of the second upper cover plate 210, the other side of the first connecting column 120 is insulated and sealedly connected to a side wall of the second lower cover plate 230, one side of the second connecting column 220 is insulated and sealedly connected to a side wall of the first upper cover plate 110, the other side of the second connecting column 220 is insulated and sealedly connected to a side wall of the first lower cover plate 130, one side wall of the first upper cover plate 110 is insulated and sealedly connected to a side wall of the second upper cover plate 210, and one side wall of the first lower cover plate 130 is insulated and sealedly connected to a side wall of the second lower cover plate 230, so that the first cover plate 100 is insulated and sealedly connected to the second cover plate 200.

[0048] In this embodiment, the first cover plate 100 is connected to one end of the first connecting column 120 through the first upper cover plate 110, and the first lower cover plate 130 is connected to the other end of the first connecting column 120, so that when the first lower cover plate 130 is powered on, it can conduct electricity to the first upper cover plate 110 through the first connecting column 120, that is, the first cover plate 100 as a whole is electrically conductive. Similarly, the second cover plate 200 is connected to one end of the second connecting column 220 through the second upper cover plate 210, and the second lower cover plate 230 is connected to the other end of the second connecting column 220, so that when the second lower cover plate 230 is powered on, it can conduct electricity to the second upper cover plate 210 through the second connecting column 220, that is, the second cover plate 200 as a whole is electrically conductive. It should be noted that the overall material of the first cover plate 100 and the second cover plate 200 is a conductor, so that the first cover plate 100 and the second cover plate 200 can conduct current when the power is supplied.

[0049] It should be noted that, since the first connecting column 120 itself has a vertical height and a horizontal width, the first upper cover plate 110 and the first lower cover plate 130 form a staggered connection in the vertical space and the horizontal space. Similarly, since the second connecting column 220 itself has a vertical height and a horizontal width, the second upper cover plate 210 and the second lower cover plate 230 form a staggered connection in the vertical space and the horizontal space. The staggered connection formed by the first cover plate 100 and the second cover plate 200 allows the first lower cover plate 130 and the second lower cover plate 230 to be in the same horizontal plane, that is, the positive and negative pole ears of the battery cell can be connected to the same side of the cover plate structure 10, saving the height space occupied by the positive and negative pole ears of the battery cell, so that the battery cell can occupy more height space in the button battery, thereby effectively improving the energy density of the battery cell, and then effectively improving the energy density of the button battery.

[0050] It should be noted that the first cover plate 100 and the second cover plate 200 are insulated and sealed, specifically: one side of the first connecting column 120 is insulated and sealed with a side wall of the second upper cover plate 210, the other side of the first connecting column 120 is insulated and sealed with a side wall of the second lower cover plate 230, one side of the second connecting column 220 is insulated and sealed with a side wall of the first upper cover plate 110, the other side of the second connecting column 220 is insulated and sealed with a side wall of the first lower cover plate 130, a side wall of the first upper cover plate 110 is insulated and sealed with a side wall of the second upper cover plate 210, and a side wall of the first lower cover plate 130 is insulated and sealed with a side wall of the second lower cover plate 230, so that the first cover plate 100 and the second cover plate 200 are insulated and sealed, that is, the first cover plate 100 and the second cover plate 200 of the present disclosure are not directly connected, but connected by an insulating sealant. Therefore, in the cover plate structure 10, it can be achieved that the first cover plate 100 and the second cover plate 200 are not electrically conductive. When the positive and negative pole tabs of the battery cell are connected to the same side of the cover structure 10, that is, the positive and negative pole tabs of the battery cell are respectively connected to the first lower cover 130 and the second lower cover 230, short circuit will not occur during the discharge of the button battery, thereby ensuring the normal use of the button battery. At the same time, it can also save the space occupied by the battery cell tabs in the shell, thereby effectively improving the energy density of the battery cell, and then effectively improving the energy density of the button battery.

[0051] like Figure 3 and Figure 4As shown, in one embodiment, a first filling cavity 101 is formed between a side wall of the first upper cover plate 110 and a side wall of the second upper cover plate 210, a second filling cavity 102 is formed between the bottom surface of the first upper cover plate 110, the bottom surface of the second upper cover plate 210, the top surface of the first lower cover plate 130 and the top surface of the second lower cover plate 230, a third filling cavity 103 is formed between a side wall of the first lower cover plate 130 and a side wall of the second lower cover plate 230, and the second filling cavity 102 is respectively connected to the first filling cavity 101 and the third filling cavity 103. It can be understood that by filling the first filling cavity 101, the second filling cavity 102 and the third filling cavity 103 with insulating sealant, the first cover plate 100 and the second cover plate 200 can be ensured to be insulated and sealed, and the cover plate structure 10 as a whole has good structural stability. The second filling cavity 102 is connected to the first filling cavity 101 and the third filling cavity 103 respectively, so that the insulating sealant can be filled into the first filling cavity 101, the second filling cavity 102 and the third filling cavity 103 at one time, thereby insulating and sealing the first cover plate 100 and the second cover plate 200.

[0052] like Figure 1 , Figure 2 , Figures 7 to 12 As shown, in one embodiment, the cover plate structure 10 for button type battery further includes an insulating sealing assembly 300, the insulating sealing assembly 300 includes an insulating sealing rubber block 310, a first insulating sealing rubber layer 320, a second insulating sealing rubber layer 330, a third insulating sealing rubber layer 340 and a fourth insulating sealing rubber layer 350, the insulating sealing rubber block 310 is respectively filled in the first filling cavity 101, the second filling cavity 102 and the third filling cavity 103, and one side of the first connecting column 120 is connected to the second upper cover plate A side wall of the first cover plate 100 is bonded to the second cover plate 210 through a first insulating sealant layer 320, the other side of the first connecting column 120 is bonded to a side wall of the second lower cover plate 230 through a second insulating sealant layer 330, one side of the second connecting column 220 is bonded to a side wall of the first upper cover plate 110 through a third insulating sealant layer 340, and the other side of the second connecting column 220 is bonded to a side wall of the first lower cover plate 130 through a fourth insulating sealant layer 350, so that the first cover plate 100 and the second cover plate 200 are insulated and sealed.

[0053] It can be understood that the first filling cavity 101, the second filling cavity 102 and the third filling cavity 103 are formed when the first cover plate 100 and the second cover plate 200 are assembled, and then the insulating sealant is injected to perform hot pressing compounding of the first cover plate 100 and the second cover plate 200. When the first cover plate 100 and the second cover plate 200 are hot pressed compounding, the insulating sealant flows into the first filling cavity 101, the second filling cavity 102 and the third filling cavity 103, and forms the insulating sealant block 310 after cooling and curing. Furthermore, the insulating sealant will flow through the first filling cavity 101, the second filling cavity 102, and the third filling cavity 103 and fill the gap between the first connecting column 120 and the second upper cover plate 210, the gap between the first connecting column 120 and the second lower cover plate 230, the gap between the second connecting column 220 and the first upper cover plate 210, and the gap between the second connecting column 220 and the first lower cover plate 230, and after cooling and solidification, form the first insulating sealant layer 320, the second insulating sealant layer 330, the third insulating sealant layer 340, and the fourth insulating sealant layer 350. That is, the insulating sealing component 300 is tightly connected to the first cover plate 100 and the second cover plate 200 respectively through hot pressing and laminating, so that the cover plate structure 10 has good structural stability, and at the same time, the first cover plate 100 and the second cover plate 200 are insulated, ensuring that the first cover plate 100 and the second cover plate 200 in the cover plate structure 10 are not conductive. Furthermore, when the positive and negative pole ears of the battery cell are connected to the same side of the cover structure 10, that is, the positive and negative pole ears of the battery cell are respectively connected to the first lower cover 130 and the second lower cover 230, a short circuit will not occur during the button battery's operation and discharge, thereby ensuring that the button battery can be used normally.

[0054] like Figure 5 and Figure 6 As shown, in one embodiment, the first cover plate 100 and the second cover plate 200 are both integrally stamped and formed. It can be understood that this makes the first cover plate 100 and the second cover plate 200 have better structural stability.

[0055] like Figure 5 and Figure 6 As shown, in one embodiment, the first upper cover plate 110, the first lower cover plate 130, the second upper cover plate 210 and the second lower cover plate 230 are all semicircular cover plates. It can be understood that the first upper cover plate 110, the first lower cover plate 130, the second upper cover plate 210 and the second lower cover plate 230 are all semicircular cover plates, which can make the overall structure of the first cover plate 100 and the second cover plate 200 consistent, and after the first cover plate 100 and the second cover plate 200 are insulated and sealed by the insulating sealing component 300, it is ensured that the cover plate structure 10 has good structural stability.

[0056] like Figure 5As shown, in one embodiment, the vertical height between the bottom surface of the first upper cover plate 110 and the bottom surface of the first lower cover plate 130 is 0.15mm-0.25mm. It can be understood that the vertical height between the bottom surface of the first upper cover plate 110 and the bottom surface of the first lower cover plate 130 is between 0.15mm-0.25mm, which can ensure that the first upper cover plate 110 and the first lower cover plate 130 are effectively offset and sunk, while reducing the height space occupied by the cover plate structure 10, thereby increasing the height space occupied by the battery cell assembly and further improving the energy density of the button battery.

[0057] like Figure 6 As shown, in one embodiment, the vertical height between the bottom surface of the second upper cover plate 210 and the bottom surface of the second lower cover plate 230 is 0.15mm-0.25mm. It can be understood that the vertical height between the bottom surface of the second upper cover plate 210 and the bottom surface of the second lower cover plate 230 is between 0.15mm-0.25mm, which can ensure that the second upper cover plate 210 and the second lower cover plate 230 are effectively offset and sunk, while reducing the height space occupied by the cover plate structure 10, thereby increasing the height space occupied by the battery cell assembly and further improving the energy density of the button battery.

[0058] like Figure 5 and Figure 6 As shown, in one embodiment, the width of the first connecting column 120 and the second connecting column 220 is 0.5mm-2mm. It can be understood that, by the width of the first connecting column 120 and the second connecting column 220 being 0.5mm-2mm, it can ensure that the first upper cover plate 110 is tightly connected to the first lower cover plate 130, and the second upper cover plate 210 is tightly connected to the second lower cover plate 230, thereby ensuring that the first cover plate 100 and the second cover plate 200 have good structural stability, and can also save the use of materials and the manufacturing cost of the cover plate structure 10.

[0059] like Figure 5 and Figure 6 As shown, in one embodiment, the thickness of the first lower cover plate 130 and the second lower cover plate 230 is 0.1mm-0.2mm. It is understandable that the thickness of the first lower cover plate 130 and the second lower cover plate 230 between 0.1mm-0.2mm can make the cover plate structure 10 fully contact with the positive and negative poles of the battery cell, thereby ensuring that the cover plate structure 10 and the positive and negative poles of the battery cell are normally connected, while also saving the use of materials and the manufacturing cost of the cover plate structure 10.

[0060] See also Figures 1 to 13The present disclosure further provides a button-type battery 20, comprising the cover plate structure 10 for the button-type battery described in any of the above embodiments, a shell 400, a battery cell 500, a first pole tab 510, and a second pole tab 520. The cover plate structure 10 is sealed and connected to the opening of the shell 400, the battery cell 500 is arranged in the shell 400, one end of the first pole tab 510 and one end of the second pole tab 520 are both connected to the same side of the battery cell 500, the other end of the first pole tab 510 is connected to the bottom surface of the first lower cover plate 130, and the other end of the second pole tab 520 is connected to the bottom surface of the second lower cover plate 230.

[0061] In this embodiment, the cover plate structure 10 of the present disclosure is used to seal the opening of the housing 400, so that the electrolyte in the housing 400 will not overflow. The other end of the first pole ear 510 is connected to the bottom surface of the first lower cover plate 130, and the other end of the second pole ear 520 is connected to the bottom surface of the second lower cover plate 230, so that the other end of the first pole ear 510 and the other end of the second pole ear 520 are connected to the same side of the cover plate structure 10, that is, the first pole ear 510 and the second pole ear 520 are located on the same side. In this way, the height occupied space of the first pole ear 510 and the second pole ear 520 in the button battery 20 can be saved, so that the height occupied space of the battery cell 500 is effectively increased, thereby improving the energy density of the battery cell 500, and further improving the energy density of the button battery 20.

[0062] like Fig.13 As shown, in one embodiment, the button battery 20 further includes an insulating sealing ring adhesive layer 600, and the other side wall periphery of the first upper cover plate 110, the other side periphery of the first lower cover plate 130, the other side wall periphery of the second upper cover plate 210, and the other side periphery of the second lower cover plate 230 are all bonded to the housing 400 through the insulating sealing ring adhesive layer 600. It can be understood that the first upper cover plate 110, the first lower cover plate 130, the second upper cover plate 210, and the second lower cover plate are bonded to the housing 400 through the insulating sealing ring adhesive layer 600, and the edge of the cover plate structure 10 is insulated and sealed, and the cover plate structure 10 can also be bonded to the housing 400, so that the overall structure of the button battery 20 is sealed, so that the button battery 20 has better structural stability.

[0063] like Fig.13 As shown, in one embodiment, the housing 400 is provided with a liquid-filling cavity 401, and the battery cell 500 is disposed in the liquid-filling cavity 401, and the liquid-filling cavity 401 is used to fill the electrolyte. It is understandable that after the electrolyte is injected into the liquid-filling cavity 401, the electrolyte contacts the battery cell 500 to generate a chemical reaction to generate electrical energy, thereby ensuring that the button battery 20 can be used normally.

[0064] Compared with the prior art, the utility model has at least the following advantages:

[0065] By making the first upper cover plate and the first lower cover plate in the first cover plate respectively connected to the two ends of the first connecting column, and the second upper cover plate and the second lower cover plate in the second cover plate respectively connected to the two ends of the second connecting column, the first upper cover plate and the first lower cover plate in the first cover plate form a staggered connection, and the second upper cover plate and the second lower cover plate in the second cover plate form a staggered connection, that is, when the cover plate structure is applied to a button battery, the first cover plate and the second cover plate can be located on the same side of the battery, and at the same time, the first cover plate and the second cover plate are insulated and sealed, and the first upper cover plate and the second lower cover plate are both used to connect the pole ears, so that the positive and negative pole ears of the button battery cell can be located on the same side, saving the space occupied by the height of the battery cell pole ears in the shell, thereby effectively improving the energy density of the battery cell, and then effectively improving the energy density of the button battery.

[0066] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A cover structure for a button battery, characterized in that: include: A first cover plate, the first cover plate comprising a first upper cover plate, a first connecting column and a first lower cover plate, one end of a side wall of the first upper cover plate is connected to one end of the first connecting column, and one end of a side wall of the first lower cover plate is connected to the other end of the first connecting column; A second cover plate, the second cover plate comprising a second upper cover plate, a second connecting column and a second lower cover plate, one end of a side wall of the second upper cover plate is connected to one end of the second connecting column, and one end of a side wall of the second lower cover plate is connected to the other end of the second connecting column; One side of the first connecting column is insulated and sealedly connected to a side wall of the second upper cover plate, the other side of the first connecting column is insulated and sealedly connected to a side wall of the second lower cover plate, one side of the second connecting column is insulated and sealedly connected to a side wall of the first upper cover plate, the other side of the second connecting column is insulated and sealedly connected to a side wall of the first lower cover plate, one side wall of the first upper cover plate is insulated and sealedly connected to a side wall of the second upper cover plate, and one side wall of the first lower cover plate is insulated and sealedly connected to a side wall of the second lower cover plate, so that the first cover plate is insulated and sealedly connected to the second cover plate.

2. The cover structure for button type battery according to claim 1, characterized in that: A first filling cavity is formed between a side wall of the first upper cover plate and a side wall of the second upper cover plate; A second filling cavity is formed between the bottom surface of the first upper cover plate, the bottom surface of the second upper cover plate, the top surface of the first lower cover plate, and the top surface of the second lower cover plate; A third filling cavity is formed between a side wall of the first lower cover plate and a side wall of the second lower cover plate; The second filling cavity is communicated with the first filling cavity and the third filling cavity respectively.

3. The cover structure for button type battery according to claim 2, characterized in that: It also includes an insulating sealing component, which includes an insulating sealing block, a first insulating sealing layer, a second insulating sealing layer, a third insulating sealing layer and a fourth insulating sealing layer. The insulating sealing block is filled in the first filling cavity, the second filling cavity and the third filling cavity respectively. One side of the first connecting column is bonded to a side wall of the second upper cover plate through the first insulating sealing layer, the other side of the first connecting column is bonded to a side wall of the second lower cover plate through the second insulating sealing layer, one side of the second connecting column is bonded to a side wall of the first upper cover plate through the third insulating sealing layer, and the other side of the second connecting column is bonded to a side wall of the first lower cover plate through the fourth insulating sealing layer, so that the first cover plate and the second cover plate are insulated and sealed.

4. The cover structure for button type battery according to claim 1, characterized in that: The first cover plate and the second cover plate are both integrally stamped structures.

5. The cover structure for button type battery according to claim 1, characterized in that: The first upper cover plate, the first lower cover plate, the second upper cover plate and the second lower cover plate are all semicircular cover plates.

6. The cover structure for button type battery according to claim 1, characterized in that: The vertical height between the bottom surface of the first upper cover plate and the bottom surface of the first lower cover plate is 0.15 mm-0.25 mm; The vertical height between the bottom surface of the second upper cover plate and the bottom surface of the second lower cover plate is 0.15 mm-0.25 mm.

7. The cover structure for button type battery according to claim 1, characterized in that: The width of the first connecting column and the second connecting column is 0.5 mm-2 mm; and / or, The thickness of the first lower cover plate and the second lower cover plate is 0.1 mm-0.2 mm.

8. A button battery, characterized in that: A cover structure, a shell, a battery cell, a first pole ear and a second pole ear for a button battery according to any one of claims 1 to 7; The cover plate structure is sealed and connected to the opening of the shell, the battery cell is arranged in the shell, one end of the first pole ear and one end of the second pole ear are connected to the same side of the battery cell, the other end of the first pole ear is connected to the bottom surface of the first lower cover plate, and the other end of the second pole ear is connected to the bottom surface of the second lower cover plate.

9. The button cell according to claim 8, characterized in that: It also includes an insulating sealing ring adhesive layer, and the other side wall periphery of the first upper cover plate, the other side periphery of the first lower cover plate, the other side wall periphery of the second upper cover plate and the other side periphery of the second lower cover plate are all bonded to the shell through the insulating sealing ring adhesive layer.

10. The button battery according to claim 8, characterized in that: The shell is provided with a liquid-filling cavity, the battery core is arranged in the liquid-filling cavity, and the liquid-filling cavity is used to be filled with electrolyte.

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