A battery cell, a battery and an electronic device

Abstract

The present application provides an electrode core, a battery and an electronic device, relating to the technical field of batteries. The electrode core includes an electrode assembly and a package. The electrode assembly includes an electrode body and a tab connected to each other. The package includes a package body and a top sealing edge connected to each other. The package body has a receiving cavity, and the electrode body is encapsulated through the receiving cavity. The part of the tab away from the electrode body is encapsulated within the top sealing edge. An opening for exposing the tab is provided on the top sealing edge, and the part of the tab exposed at the opening is used to connect with a protection board. Based on the electrode core provided by the present application, when manufacturing a battery, since there is no part of the tab protruding out of the top sealing edge, the folding thickness of this part is avoided from occupying the top space of the electrode core, thereby improving the space utilization rate of the top of the electrode core and being beneficial to improving the energy density of the battery.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and in particular, to a battery cell, a battery, and an electronic device. Background Art

[0002] The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present disclosure, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art.

[0003] Batteries in electronic devices such as mobile phones, tablet computers, and laptop computers are usually configured with a protection board (Protection Circuit Module, PCM) to monitor the usage status of the battery cell, thereby ensuring the safety and performance of the battery cell during use.

[0004] When existing batteries are manufactured, the protection board is connected to the part of the tab that extends out of the top sealing edge of the battery cell, and then the protection board, the top sealing edge, and the part of the tab that extends out of the top sealing edge are folded together to the top of the battery cell. However, the folding thickness of the part of the tab that extends out of the top sealing edge occupies the space at the top of the battery cell, reducing the space utilization rate at the top of the battery cell, which is not conducive to improving the energy density of the battery. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a battery cell, a battery, and an electronic device, aiming to solve the technical problem of how to improve the space utilization rate at the top of the battery cell to increase the energy density of the battery.

[0006] To achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] In a first aspect, an embodiment of this application provides a battery cell, including: an electrode assembly, including an electrode body and a tab connected to each other; a packaging member, including a packaging body and a top sealing edge connected to each other, the packaging body having a receiving cavity, and encapsulating the electrode body through the receiving cavity, a part of the tab away from the electrode body is encapsulated within the top sealing edge, an opening for exposing the tab is provided on the top sealing edge, and the part of the tab exposed at the opening is used to connect to a protection board.

[0008] In a second aspect, an embodiment of this application provides a battery, including a protection board and the battery cell described in any one of the first aspect embodiments above, and the protection board is connected to the part of the tab exposed at the opening.

[0009] In one of the embodiments of the second aspect, the battery cell has a first direction, a second direction, and a third direction that are perpendicular to each other, the top sealing edge is located on one side of the packaging body along the third direction, and the protection board is located on one side of the top sealing edge along the second direction.

[0010] In one embodiment of the second aspect, the opening includes a first opening. The first opening and the protection plate are on the same side of the top seal along the second direction, and the portion of the tab exposed at the first opening is connected to the protection plate.

[0011] In one embodiment of the second aspect, a pad is provided on the protection plate. The portion of the tab exposed at the first opening is welded to the pad. The opening further includes a second opening which is located on the side of the top seal along the second direction away from the pad, and the second opening and the first opening are oppositely arranged along the second direction.

[0012] In one embodiment of the second aspect, the protection plate has a thickness direction and a narrow side parallel to the thickness direction. The thickness direction is parallel to the third direction and perpendicular to the first direction and the second direction, and the portion of the tab exposed at the first opening is connected to the narrow side.

[0013] In one embodiment of the second aspect, the protection plate has a thickness direction and a wide side perpendicular to the thickness direction. The thickness direction is parallel to the second direction and perpendicular to the first direction and the third direction, and the portion of the tab exposed at the first opening is connected to the wide side.

[0014] In one embodiment of the second aspect, the tab includes a first tab body and a second tab body connected to each other. The second tab body is connected to the electrode body. The first tab body is encapsulated within the top seal edge. The encapsulation encapsulates the electrode body and the portion of the second tab body away from the first tab body through the accommodation cavity. The portion of the first tab body exposed at the opening is connected to the protection plate, and the dimension of the first tab body along the first direction is greater than the dimension of the second tab body along the first direction.

[0015] In one embodiment of the second aspect, the dimension of the opening along the first direction is less than the dimension of the first tab body along the first direction, and the dimension of the opening along the first direction is greater than the dimension of the second tab body along the first direction.

[0016] In one embodiment of the second aspect, the battery cell has a first direction, a second direction and a third direction that are perpendicular to each other, the top seal is located on one side of the package body along the third direction, the side of the package body along the third direction facing the top seal is a top wall, the side of the package body along the second direction away from the top seal is a front side wall, the top seal is bent toward the front side wall and is arranged in contact with the top wall, the opening includes a first opening, the first opening is located on the side of the bent portion of the top seal away from the top wall along the third direction, the protective plate is stacked on the side of the bent portion of the top seal away from the top wall along the third direction, and is connected to the portion of the pole ear exposed to the first opening.

[0017] In one embodiment of the second aspect, the battery cell has a first direction, a second direction and a third direction that are perpendicular to each other, the top seal is located on one side of the package body along the third direction, the side of the package body along the third direction facing the top seal is a top wall, and the side of the package body along the second direction away from the top seal is a front side wall, the top seal is bent toward the front side wall, and the bent portion of the top seal and the top wall are spaced apart along the third direction, the opening includes a first opening, the first opening is located on the side of the bent portion of the top seal toward the top wall along the third direction, the protective plate is stacked between the bent portion of the top seal and the top wall, and is connected to the portion of the pole ear exposed to the first opening.

[0018] In one embodiment of the second aspect, the battery further includes a sealant layer, and the sealant layer is connected to the protection plate and the top seal.

[0019] In one embodiment of the second aspect, the battery further includes an adhesive layer, which is wound around the circumference of the battery core to cover the top seal, the protective plate and the sealant layer.

[0020] In a third aspect, an embodiment of the present application provides an electronic device, comprising a main board and the battery described in any embodiment of the second aspect, wherein the main board is electrically connected to the protection board.

[0021] The beneficial effects of this application are as follows:

[0022] For the battery cell provided in this application, since the part of the tab away from the electrode body is encapsulated within the top sealing edge, that is, the tab is received within the top sealing edge and does not protrude from the top sealing edge. At the same time, an opening for exposing the tab is provided on the top sealing edge, and the part of the tab exposed at the opening is connected to the protection board. In this way, when manufacturing the battery, since there is no part of the tab protruding from the top sealing edge, the folding thickness of this part is avoided from occupying the space at the top of the battery cell, thereby improving the space utilization rate at the top of the battery cell and being beneficial to enhancing the energy density of the battery.

[0023] To make the above objectives, features, and advantages of this application more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the attached drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the attached drawings required for use in the embodiments. It should be understood that the following attached drawings only show some embodiments of this application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant attached drawings can also be obtained based on these attached drawings.

[0025] Figure 1 Shows a schematic structural diagram of the battery from the first perspective in one embodiment of this application;

[0026] Figure 2 Shows a schematic structural diagram of the battery from the second perspective in one embodiment of this application;

[0027] Figure 3 Shows a schematic structural diagram of the battery from the first perspective in another embodiment of this application;

[0028] Figure 4 Shows a schematic structural diagram of the battery from the second perspective in another embodiment of this application;

[0029] Figure 5 Shows a schematic structural diagram of the battery cell from the first perspective in one embodiment of this application;

[0030] Figure 6 Shows Figure 5 The partial sectional structural diagram at A-A in;

[0031] Figure 7 Shows Figure 5 The partial sectional structural diagram at B-B in;

[0032] Figure 8 Shows Figure 5 The enlarged structural diagram of area C in;

[0033] Figure 9Shows a schematic perspective view of a protection board in an embodiment of the present application;

[0034] Figure 10 Shows a schematic view of the structure of a battery from a third perspective in another embodiment of the present application;

[0035] Figure 11 Shows a schematic view of the structure of a battery from a third perspective in yet another embodiment of the present application.

[0036] Description of main element symbols:

[0037] 1000 - Battery; 100 - Battery cell; 110 - Electrode assembly; 111 - Electrode body; 112 - Tab; 1121 - First tab body; 1122 - Second tab body; 120 - Encapsulation; 121 - Encapsulation body; 1211 - Top wall; 1212 - Front side wall; 122 - Top sealing edge; 123 - Accommodation cavity; 125 - Opening; 1251 - First opening; 1252 - Second opening; 126 - Side sealing edge; 200 - Protection board; 210 - Narrow side; 220 - Wide side; X - First direction; Y - Second direction; Z - Third direction; S - Thickness direction. Detailed description of the specific implementation

[0038] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0039] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 should not be construed as a limitation of the present application.

[0040] In addition, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0041] In the description of the present application, the terms "first", "second", etc. are used to distinguish different objects, and should not be construed as indicating or implying a specific order or primary-secondary relationship, nor implicitly indicating the number of the technical features indicated. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] In the description of the present application, the term "and / or" indicates three possible relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0044] In the description of the present application, "parallel" includes not only the case of absolute parallelism, but also the case of approximately parallelism as conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximately perpendicularity as conventionally recognized in engineering. Exemplarily, if the included angle between two directions is 80° - 90°, the two directions can be considered perpendicular; if the included angle between two directions is 0° - 10°, the two directions can be considered parallel.

[0045] The batteries in electronic devices are usually equipped with a protection board (Protection Circuit Module, PCM), which is used to monitor the usage status of the battery cells, so as to ensure the usage safety and performance of the battery cells.

[0046] When the existing battery is manufactured, the protection board is connected to the part of the tab of the battery cell that extends out of the top sealing edge, and then the protection board, the top sealing edge, and the part of the tab that extends out of the top sealing edge are folded together to the top of the battery cell.

[0047] However, the folding thickness of the part of the tab that extends out of the top sealing edge will occupy the space at the top of the battery cell, reducing the space utilization rate at the top of the battery cell, which is not conducive to the improvement of the energy density of the battery cell. In addition, since the tab extends out of the top sealing edge, short circuits are likely to occur, so there are relatively large safety risks.

[0048] To solve the above technical problems, as Figure 1 and Figure 5 shown, in a first aspect, an embodiment of the present application provides a battery cell 100, which relates to the technical field of batteries and is mainly applied to a battery 1000 with a protection board 200, and is used to store electrical energy and supply power to electronic devices.

[0049] Combined with Figure 6 and Figure 7 shown, the battery cell 100 provided in this embodiment includes an electrode assembly 110 and a packaging member 120.

[0050] Among them, the electrode assembly 110 includes an electrode body 111 and a tab 112 connected to each other; the packaging member 120 includes a packaging body 121 and a top sealing edge 122 connected to each other. The packaging body 121 has a receiving cavity 123, and the electrode body 111 is packaged through the receiving cavity 123. The part of the tab 112 away from the electrode body 111 is packaged in the top sealing edge 122. An opening 125 for exposing the tab 112 is provided on the top sealing edge 122, and the part of the tab 112 exposed at the opening 125 is used to connect to the protection board 200.

[0051] Exemplarily, the connection between the protection board 200 and the tab 112 can be selected from welding, clamping, abutting, screw connection, etc., and no specific limitation is made here.

[0052] Exemplarily, the opening 125 can be formed by laser cutting on the top sealing edge 122 after the packaging member 120 is manufactured; of course, the opening 125 can also be reserved during the manufacturing process of the packaging member 120, such as being pre-cut or pre-punched, and no specific limitation is made on the formation method of the opening 125 here.

[0053] It can be understood that for the battery cell 100 provided in this embodiment, since the part of the tab 112 away from the electrode body 111 is encapsulated within the top sealing edge 122, that is, the tab 112 is received within the top sealing edge 122 and does not protrude from the top sealing edge 122. At the same time, an opening 125 for exposing the tab 112 is provided on the top sealing edge 122, and the part of the tab 112 exposed at the opening 125 is connected to the protection board 200. In this way, when manufacturing the battery 1000, since there is no part of the tab 112 protruding from the top sealing edge 122, the folding thickness of this part is avoided from occupying the top space of the battery cell 100, thereby improving the space utilization rate at the top of the battery cell 100 and being beneficial to enhancing the energy density of the battery 1000.

[0054] In addition, with the above design, the tab 112 is not protruding from the top sealing edge 122 but is received within the top sealing edge 122, reducing the possibility of short circuit and enhancing the safety of the battery 1000.

[0055] Exemplarily, the encapsulation member 120 can be made of an encapsulation layer such as an aluminum-plastic film or a steel-plastic film. For example, when manufacturing the encapsulation member 120, two grooves are formed on the encapsulation layer through a stamping process, and then the encapsulation layer is folded in half into two layers so that the two grooves face each other (hereinafter, the above two layers are referred to as the first encapsulation layer and the second encapsulation layer), and the edges of the first encapsulation layer and the second encapsulation layer are hermetically connected, such that the two grooves enclose to form a receiving cavity 123 for receiving the electrode body 111, thereby forming the encapsulation member 120.

[0056] As Figure 2 and Figures 4 to 6 shown, the part where the above first encapsulation layer and the second encapsulation layer are hermetically connected includes the top sealing edge 122 and two side sealing edges 126. The top sealing edge 122 is connected between the two side sealing edges 126. The top sealing edge 122 protrudes relative to the top wall 1211 of the encapsulation body 121. The part of each side sealing edge 126 connected to the top sealing edge 122 protrudes relative to the top wall 1211 of the encapsulation body 121. The part of the tab 112 away from the electrode body 111 is received within the top sealing edge 122 and is thus encapsulated by the interlayer within the top sealing edge 122. The interlayer includes the part of the first encapsulation layer located at the top sealing edge 122 and the part of the second encapsulation layer located at the top sealing edge 122. It can be further understood that: this part of the tab 112 away from the electrode body 111 is clamped between this part of the first encapsulation layer located at the top sealing edge 122 and this part of the second encapsulation layer located at the top sealing edge 122.

[0057] Exemplarily, the electrode body 111 includes a pole piece and a separator. The pole piece includes a first pole piece and a second pole piece. The polarities of the first pole piece and the second pole piece are opposite, that is, one of them is the positive pole piece and the other is the negative pole piece. The separator is disposed between the first pole piece and the second pole piece to separate the first pole piece and the second pole piece. The pole tabs 112 include a first pole tab and a second pole tab. The polarities of the first pole tab and the second pole tab are opposite, that is, one of them is the positive pole tab and the other is the negative pole tab. The positive pole tab is connected to the positive pole piece, and the negative pole tab is connected to the negative pole piece, thereby serving as the positive pole and the negative pole of the battery cell 100 respectively.

[0058] Of course, it is also possible that the electrode assembly 110 includes a pole piece and a separator. The pole piece includes a positive pole piece and a negative pole piece. The separator is disposed between the positive pole piece and the negative pole piece. The positive pole tab is a part of the positive pole piece, and the negative pole tab is a part of the negative pole piece. For example, the positive pole piece includes an aluminum foil and a positive active material, and the positive active material is coated on the coated area of the aluminum foil. The non-coated area of the aluminum foil serves as the positive pole tab. The negative pole piece includes a copper foil and a negative active material, and the negative active material is coated on the coated area of the copper foil. The non-coated area of the copper foil serves as the negative pole tab. The structure of the electrode assembly 110 is not specifically limited herein.

[0059] As Figure 1 、 Figure 3 、 Figure 10 and Figure 11 shown, in a second aspect, an embodiment of the present application provides a battery 1000, including a protection board 200 and the battery cell 100 in any one of the above first aspects.

[0060] Exemplarily, the protection board 200 includes a circuit board and electronic components disposed on the circuit board. The circuit board can be a printed circuit board (PCB) or a flexible printed circuit board (FPC). The electronic components are, for example, connectors, memories, resistors, capacitors, positive temperature coefficient thermistors (PTC), negative temperature coefficient thermistors (NTC), etc. The structure of the protection board 200 is not specifically limited herein.

[0061] It can be understood that since the battery 1000 provided in this embodiment has the battery cell 100 in any one of the above first aspects, it has all the beneficial effects of the battery cell 100, which will not be elaborated herein one by one.

[0062] As Figure 1 and Figure 2As shown, in one embodiment, the battery cell 100 has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other, the top sealing edge 122 is located on one side of the packaging body 121 along the third direction Z, and the protection plate 200 is located on one side of the top sealing edge 122 along the second direction Y.

[0063] It can be understood that, since the tab 112 is encapsulated in the top sealing edge 122 and does not extend from the top sealing edge 122 along the third direction Z, on this basis, the protection plate 200 is located on one side of the top sealing edge 122 along the second direction Y, and is connected to the portion of the tab 112 exposed to the opening 125. In this way, when manufacturing the battery 1000, since there is no portion of the tab 112 extending from the top sealing edge 122, the folded thickness of this portion is avoided from occupying the top space of the battery cell 100, thereby improving the space utilization rate of the top of the battery cell 100, which is beneficial to improving the energy density of the battery 1000.

[0064] like Figure 5 and Figure 6 As shown, further, the opening 125 includes a first opening 1251 , the first opening 1251 and the protection plate 200 are located on the same side of the top sealing edge 122 along the second direction Y, and the portion of the tab 112 exposed to the first opening 1251 is connected to the protection plate 200 .

[0065] It can be understood that since the first opening 1251 is provided on the top sealing edge 122, and the first opening 1251 and the protective plate 200 are located on the same side of the top sealing edge 122 along the second direction Y, it is convenient to connect the protective plate 200 with the pole ear 112, so that the pole ear 112 does not need to extend out of the top sealing edge 122 along the third direction Z. Therefore, when the battery 1000 is manufactured, there is no part of the pole ear 112 extending out of the top sealing edge 122, which avoids the folding thickness of this part from occupying the top space of the battery cell 100, thereby saving the top space of the battery cell 100 and reducing the risk of short circuit.

[0066] Furthermore, a pad is disposed on the protection plate 200 , and a portion of the tab 112 exposed to the first opening 1251 is welded to the pad.

[0067] It is understandable that welding can effectively reduce the possibility of the electrode tab 112 falling off the protection plate 200, so that the electrical connection between the protection plate 200 and the electrode assembly 110 is more stable.

[0068] like Figure 5 and Figure 6 As shown, further, the opening 125 further includes a second opening 1252 , which is located on a side of the top sealing edge 122 away from the pad along the second direction Y, and the second opening 1252 and the first opening 1251 are arranged opposite to each other along the second direction Y.

[0069] It can be understood that by additionally providing a second opening 1252 disposed opposite to the first opening 1251 on the basis of providing the first opening 1251, it is convenient to perform spot welding on the protection plate 200 and the tab 112, so as to improve the welding reliability.

[0070] As Figure 1 , Figure 2 and Figure 9 shown, in a specific embodiment, the protection plate 200 has a thickness direction S and a narrow surface side 210 parallel to the thickness direction S. The thickness direction S is parallel to the third direction Z and perpendicular to the first direction X and the second direction Y. The portion of the tab 112 exposed at the first opening 1251 is connected to the narrow surface side 210. It can be understood that the protection plate 200 and the top sealing edge 122 are perpendicular to each other. Such an arrangement can effectively reduce the occupation of the top space of the battery cell 100 by the protection plate 200, making the structure of the battery 1000 more compact, and thus more effectively improving the space utilization rate of the top of the battery cell 100.

[0071] As Figure 3 , Figure 4 and Figure 9 shown, in another specific embodiment, the protection plate 200 has a thickness direction S and a wide surface side 220 perpendicular to the thickness direction S. The thickness direction S is parallel to the second direction Y and perpendicular to the first direction X and the third direction Z. The portion of the tab 112 exposed at the first opening 1251 is connected to the wide surface side 220. It can be understood that the protection plate 200 and the top sealing edge 122 are parallel to each other. Such an arrangement is applicable to the case where the battery cell 100 is an ultra-thin battery cell. Since when manufacturing the battery 1000 with an ultra-thin battery cell, there is also no portion of the tab 112 protruding beyond the top sealing edge 122, avoiding the occupation of the top space of the ultra-thin battery cell by the folded thickness of this portion, so the space utilization rate of the top of the ultra-thin battery cell can be improved.

[0072] It should be noted that when pads are provided on the protection plate 200, the positions of the pads can be set according to the above arrangement. For example, when the portion of the tab 112 exposed at the first opening 1251 is connected to the narrow surface side 210 of the protection plate 200, the pads can be provided on the narrow surface side 210 to be welded to the tab 112; when the portion of the tab 112 exposed at the first opening 1251 is connected to the wide surface side 220 of the protection plate 200, the pads can be provided on the wide surface side 220 to be welded to the tab 112.

[0073] As Figures 5 to 9As shown in the figure, further, the tab 112 includes a first tab body 1121 and a second tab body 1122 connected to each other. The second tab body 1122 is connected to the electrode body 111. The first tab body 1121 is encapsulated within the top sealing edge 122. The encapsulation body 121 encapsulates the electrode body 111 and the portion of the second tab body 1122 away from the first tab body 1121 through the accommodation cavity 123. The portion of the first tab body 1121 exposed at the opening 125 is connected to the protection plate 200. The dimension of the first tab body 1121 along the first direction X is greater than the dimension of the second tab body 1122 along the first direction X.

[0074] It can be understood that by defining that the dimension L3 of the first tab body 1121 along the first direction X is greater than the dimension L1 of the second tab body 1122 along the first direction X, that is, increasing the dimension of the portion of the tab 112 encapsulated within the top sealing edge 122 in the first direction X, this can increase the contact area between the top sealing edge 122 and the tab 112, enabling the top sealing edge 122 to encapsulate the tab 112 more reliably, thereby improving the sealing performance of the battery cell 100.

[0075] As Figure 8 shown in the figure, furthermore, the dimension of the opening 125 along the first direction X is less than the dimension of the first tab body 1121 along the first direction X, and the dimension of the opening 125 along the first direction X is greater than the dimension of the second tab body 1122 along the first direction X.

[0076] It can be understood that by defining that the dimension L2 of the opening 125 along the first direction X is less than the dimension L3 of the first tab body 1121 along the first direction X, and the dimension L2 of the opening 125 along the first direction X is greater than the dimension L1 of the second tab body 1122 along the first direction X, this increases the contact area between the tab 112 and the protection plate 200, making the electrical connection between the protection plate 200 and the electrode assembly 110 more stable, and not overly exposing the tab 112 to affect the sealing performance of the battery cell 100.

[0077] It should be noted that when the opening 125 includes a first opening 1251 and a second opening 1252, the dimension L2 of the opening 125 along the first direction X can be understood as: the dimension of the first opening 1251 along the first direction X and / or the dimension of the second opening 1252 along the first direction X is L2, that is, the dimension of the first opening 1251 along the first direction X is L2, or the dimension of the second opening 1252 along the first direction X is L2, or the dimensions of both the first opening 1251 and the second opening 1252 along the first direction X are L2.

[0078] As Figure 5 、 Figure 6 and Figure 10As shown, in another embodiment, the battery cell 100 has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other, the top sealing edge 122 is located on one side of the package body 121 along the third direction Z, the side of the package body 121 along the third direction Z facing the top sealing edge 122 is a top wall 1211, and the side of the package body 121 along the second direction Y away from the top sealing edge 122 is a front side wall 1212, the top sealing edge 122 is bent toward the front side wall 1212, and is arranged to fit the top wall 1211, the opening 125 includes a first opening 1251, and the first opening 1251 is located on the side of the bent portion of the top sealing edge 122 away from the top wall 1211 along the third direction Z, and the protective plate 200 is stacked on the side of the bent portion of the top sealing edge 122 away from the top wall 1211 along the third direction Z, and is connected to the portion of the pole ear 112 exposed to the first opening 1251.

[0079] Combination Figure 9 As shown, it should be noted that "the protective plate 200 is stacked on the side of the bent portion of the top sealing edge 122 away from the top wall 1211 along the third direction Z" can be understood as: the thickness direction S of the protective plate 200 is parallel to the third direction Z, and perpendicular to the first direction X and the second direction Y.

[0080] It can be understood that, since the top sealing edge 122 is bent toward the front side wall 1212 and is arranged in close contact with the top wall 1211, and at the same time, the protection plate 200 is stacked on the side of the bent portion of the top sealing edge 122 away from the top wall 1211 along the third direction Z, it is possible to reduce the space occupied by the top sealing edge 122 and the protection plate 200 on the top of the battery cell 100, thereby further improving the space utilization rate of the top of the battery cell 100.

[0081] It should be noted that when the pole ear 112 is welded to the protective plate 200, the opening 125 may also include a second opening 1252. The second opening 1252 and the first opening 1251 are arranged relative to each other to facilitate spot welding when the top sealing edge 122 is not bent. After spot welding, the top sealing edge 122 is bent toward the front side wall 1212 and is arranged to fit the top wall 1211. At this time, the second opening 1252 is located on the side of the bent part of the top sealing edge 122 along the third direction Z toward the top wall 1211.

[0082] like Figure 5 , Figure 6 and Figure 11As shown, in yet another embodiment, the battery cell 100 has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other pairwise. The top sealing edge 122 is located on one side of the encapsulation body 121 along the third direction Z. The side of the encapsulation body 121 facing the top sealing edge 122 along the third direction Z is the top wall 1211. The side of the encapsulation body 121 away from the top sealing edge 122 along the second direction Y is the front side wall 1212. The top sealing edge 122 is bent in the direction facing the front side wall 1212, and the bent portion of the top sealing edge 122 and the top wall 1211 are spaced apart along the third direction Z. The opening 125 includes a first opening 1251. The first opening 1251 is located on the side of the bent portion of the top sealing edge 122 facing the top wall 1211 along the third direction Z. The protection plate 200 is laminated between the bent portion of the top sealing edge 122 and the top wall 1211 and is connected to the portion of the tab 112 exposed in the first opening 1251.

[0083] Combined with Figure 9 As shown, it should be noted that "the protection plate 200 is laminated between the bent portion of the top sealing edge 122 and the top wall 1211" can be understood as: the protection plate 200 is located in the gap formed between the bent portion of the top sealing edge 122 and the top wall 1211, and the thickness direction S of the protection plate 200 is parallel to the third direction Z and perpendicular to the first direction X and the second direction Y.

[0084] It can be understood that since the top sealing edge 122 is bent in the direction facing the front side wall 1212, and the bent portion of the top sealing edge 122 and the top wall 1211 are spaced apart along the third direction Z. At the same time, the protection plate 200 is laminated between the bent portion of the top sealing edge 122 and the top wall 1211. This can also reduce the occupation of the top space of the battery cell 100 by the top sealing edge 122 and the protection plate 200, thereby further improving the space utilization rate of the top of the battery cell 100.

[0085] It should be noted that when the tab 112 is welded to the protection plate 200, the opening 125 may further include a second opening 1252. The second opening 1252 is disposed opposite to the first opening 1251 to facilitate spot welding when the top sealing edge 122 is not bent. After spot welding, the top sealing edge 122 is bent in the direction facing the front side wall 1212 and is spaced apart from the top wall 1211. At this time, the second opening 1252 is located on the side of the bent portion of the top sealing edge 122 facing away from the top wall 1211 along the third direction Z.

[0086] In one embodiment, the battery 1000 further includes a sealant layer, and the sealant layer is connected to the protection plate 200 and the top sealing edge 122.

[0087] Exemplarily, the material of the sealant layer can be selected from silicone sealant, epoxy resin sealant, polyurethane sealant, hot melt adhesive, etc., and no specific limitation is made here.

[0088] It can be understood that when manufacturing the battery 1000, the part of the protection board 200 and the tab 112 exposed to the opening 125 is connected, and then glue is injected onto the top of the battery cell 100 to form a sealing glue layer to achieve overall sealing, and the protection board 200 is fixed on the top sealing edge 122, improving the stability of the protection board 200.

[0089] Furthermore, the battery 1000 further includes an adhesive layer, which is wound circumferentially around the battery cell 100 to cover the top sealing edge 122, the protection board 200, and the sealing glue layer, thereby achieving overall winding and fixing of the battery cell 100 and the protection board 200.

[0090] It should be noted that the "circumferential direction of the battery cell 100" can be understood as the direction around the center line of the battery cell 100. The center line of the above-mentioned battery cell 100 is parallel to the third direction Z and perpendicular to the first direction X and the second direction Y.

[0091] Exemplarily, the adhesive layer can be a laminated structure such as adhesive paper or adhesive tape with insulation and adhesion functions, and no specific limitation is made here.

[0092] In a third aspect, an embodiment of the present application provides an electronic device, including a main board and the battery 1000 in any one of the embodiments of the first aspect above. The main board is electrically connected to the protection board 200 of the battery 1000.

[0093] It should be noted that the electronic device can be a mobile phone, a tablet computer, a laptop computer, a smart watch, an e-book reader, a drone, a portable game console, wireless headphones, a digital camera, a video camera, an electric toothbrush, a razor, etc.

[0094] Of course, the above-mentioned battery 1000 can also be applied to other electrical equipment, such as vehicles, power tools, etc. Vehicles can be fuel vehicles, gas vehicles, new energy vehicles, etc. New energy vehicles can be pure electric vehicles, hybrid vehicles, and extended-range electric vehicles, etc. Power tools can be metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, etc. No specific limitation is made on the application scenarios of the above-mentioned battery 1000 here.

[0095] It can be understood that since the electronic device provided in this embodiment has the battery 1000 in any one of the embodiments of the second aspect above, it has all the beneficial effects of the battery 1000, which will not be elaborated here one by one.

[0096] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0097] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A battery, characterized in that, It includes a protection board (200) and an electric core (100). The electric core (100) includes an electrode assembly (110) and a package (120). The electrode assembly (110) includes an electrode body (111) and a tab (112) connected to each other. The package (120) includes a package body (121) and a top sealing edge (122) connected to each other. The package body (121) has a receiving cavity (123), and the electrode body (111) is encapsulated through the receiving cavity (123). The part of the tab (112) away from the electrode body (111) is encapsulated in the top sealing edge (122). An opening (125) for exposing the tab (112) is provided on the top sealing edge (122). The opening (125) includes a first opening (1251) and a second opening (1252) arranged oppositely. The first opening (1251) and the protection board (200) are on the same side of the top sealing edge (122), and the second opening (1252) is on the side of the top sealing edge (122) facing away from the protection board (200). The protection board (200) is connected to the part of the tab (112) exposed at the first opening (1251), and the tab (112) is welded to the protection board (200) through the second opening (1252).

2. The battery according to claim 1, characterized in that, The electric core (100) has a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other in pairs. The top sealing edge (122) is located on one side of the package body (121) along the third direction (Z). The first opening (1251) and the protection board (200) are on the same side of the top sealing edge (122) along the second direction (Y).

3. The battery according to claim 2, characterized in that, A pad is provided on the protection board (200). The part of the tab (112) exposed at the first opening (1251) is welded to the pad. The second opening (1252) is located on the side of the top sealing edge (122) facing away from the pad along the second direction (Y). The second opening (1252) and the first opening (1251) are arranged oppositely along the second direction (Y).

4. The battery according to claim 2, characterized in that, The protection board (200) has a thickness direction (S) and a narrow side (210) parallel to the thickness direction (S). The thickness direction (S) is parallel to the third direction (Z) and perpendicular to the first direction (X) and the second direction (Y). The part of the tab (112) exposed at the first opening (1251) is connected to the narrow side (210).

5. The battery according to claim 2, characterized in that, The protection board (200) has a thickness direction (S) and a wide side (220) perpendicular to the thickness direction (S). The thickness direction (S) is parallel to the second direction (Y) and perpendicular to the first direction (X) and the third direction (Z). The part of the tab (112) exposed at the first opening (1251) is connected to the wide side (220).

6. The battery according to claim 1, characterized in that The battery cell (100) has a first direction (X); the pole tab (112) comprises a first pole tab body (1121) and a second pole tab body (1122) connected to each other; the second pole tab body (1122) is connected to the electrode body (111); the first pole tab body (1121) is encapsulated in the top sealing edge (122); the encapsulation body (121) encapsulates the electrode body (111) and a portion of the second pole tab body (1122) away from the first pole tab body (1121) through the accommodating cavity (123); a portion of the first pole tab body (1121) exposed to the first opening (1251) is connected to the protection plate (200); and a size of the first pole tab body (1121) along the first direction (X) is greater than a size of the second pole tab body (1122) along the first direction (X).

7. The battery according to claim 6, characterized in that, The size of the opening (125) along the first direction (X) is smaller than the size of the first pole tab body (1121) along the first direction (X), and the size of the opening (125) along the first direction (X) is larger than the size of the second pole tab body (1122) along the first direction (X).

8. The battery according to claim 1, wherein The battery cell (100) has a first direction (X), a second direction (Y), and a third direction (Z) which are perpendicular to each other; the top sealing edge (122) is located on one side of the package body (121) along the third direction (Z); the side of the package body (121) along the third direction (Z) facing the top sealing edge (122) is a top wall (1211); the side of the package body (121) along the second direction (Y) away from the top sealing edge (122) is a front side wall (1212); the top sealing edge (122) faces the front side wall (1211); The top edge (122) is bent in the direction of the top sealing edge (1212) and is arranged to fit the top wall (1211), the opening (125) comprises a first opening (1251), the first opening (1251) is located on a side of the bent portion of the top sealing edge (122) away from the top wall (1211) along the third direction (Z), the protection plate (200) is stacked on a side of the bent portion of the top sealing edge (122) away from the top wall (1211) along the third direction (Z), and is connected to a portion of the pole lug (112) exposed to the first opening (1251).

9. The battery according to claim 1, characterized in that, The battery cell (100) has a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other pairwise. The top sealing edge (122) is located on one side of the encapsulation body (121) along the third direction (Z). The side of the encapsulation body (121) facing the top sealing edge (122) along the third direction (Z) is the top wall (1211). The side of the encapsulation body (121) away from the top sealing edge (122) along the second direction (Y) is the front side wall (1212). The top sealing edge (122) is bent in the direction towards the front side wall (1212), and the bent part of the top sealing edge (122) is spaced apart from the top wall (1211) along the third direction (Z). The opening (125) includes a first opening (1251). The first opening (1251) is located on the side of the bent part of the top sealing edge (122) facing the top wall (1211) along the third direction (Z). The protection plate (200) is laminated between the bent part of the top sealing edge (122) and the top wall (1211), and is connected to the part of the tab (112) exposed in the first opening (1251).

10. The battery according to any one of claims 1 to 9, characterized in that, The battery further includes a sealant layer that is connected to the protection plate (200) and the top sealing edge (122).

11. The battery according to claim 10, wherein The battery further includes an adhesive layer that is wound around the circumference of the battery cell (100) to cover the top sealing edge (122), the protection plate (200), and the sealant layer.

12. An electronic device, characterized in that, It includes a main board and the battery according to any one of claims 1 to 11, and the main board is electrically connected to the protection plate (200).

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