Battery cell, battery and electronic equipment

Abstract

The invention provides a battery cell, a battery and electronic equipment, and relates to the technical field of batteries. The battery cell comprises an electrode assembly and a packaging body, the electrode assembly comprises an electrode body and a tab which are connected, the packaging piece comprises the packaging body and a top sealing edge which are connected, the packaging body is provided with a containing cavity, the electrode body is packaged through the containing cavity, the portion, away from the electrode body, of the tab is packaged in the top sealing edge, and an opening for exposing the tab is formed in the top sealing edge. The part of the tab exposed out of the opening is connected with a protection plate. On the basis of the battery cell provided by the invention, when the battery is manufactured, the part, extending out of the top sealing edge, of the tab does not exist, so that the occupation of the folding thickness of the part on the top space of the battery cell is avoided, the space utilization rate of the top of the battery cell is improved, and the energy density of the battery is favorably improved.

Description

Technical Field

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

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

[0003] The batteries in electronic devices such as mobile phones, tablet computers, and laptops are usually equipped with a protection circuit module (PCM) to monitor the usage status of the battery cells to ensure the safety and performance of the battery cells.

[0004] When manufacturing existing batteries, the protective plate is connected to the portion of the cell's tab extending from the top sealing edge, and then the protective plate, the top sealing edge, and the portion of the tab extending from the top sealing edge are folded together to the top of the cell. However, the folded thickness of the portion of the tab extending from the top sealing edge will occupy the space at the top of the cell, reducing the space utilization rate at the top of the cell, which is not conducive to improving the battery's energy density. Summary of the invention

[0005] In view of this, the purpose of the present 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 objectives, the technical solutions adopted in this application are as follows: In the first aspect, an embodiment of the present application provides a battery cell, comprising: an electrode assembly, comprising an electrode body and a pole ear connected to each other; a package, comprising a package body and a top seal connected to each other, the package body having a receiving cavity, and the electrode body is encapsulated by the receiving cavity, a portion of the pole ear away from the electrode body is encapsulated in the top seal, an opening is provided on the top seal to expose the pole ear, and the portion of the pole ear exposed in the opening is used for connection with a protective plate.

[0007] In a second aspect, an embodiment of the present application provides a battery, comprising a protection plate and the battery cell described in any one of the embodiments of the first aspect, wherein the protection plate is connected to a portion of the tab exposed to the opening.

[0008] 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 protective plate is located on one side of the top sealing edge along the second direction.

[0009] In one embodiment of the second aspect, the opening includes a first opening, the first opening and the protection plate are located on the same side of the top sealing edge along the second direction, and a portion of the tab exposed to the first opening is connected to the protection plate.

[0010] In one of the embodiments of the second aspect, a welding pad is arranged on the protective plate, and the portion of the pole ear exposed to the first opening is welded to the welding pad, and the opening also includes a second opening, and the second opening is located on the side of the top seal edge away from the welding pad along the second direction, and the second opening and the first opening are arranged opposite to each other along the second direction.

[0011] In one embodiment of the second aspect, the protective 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 pole ear exposed to the first opening is connected to the narrow side.

[0012] In one of the embodiments of the second aspect, the protective 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 to the first opening is connected to the wide side.

[0013] 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 in the top seal, the encapsulation body encapsulates the electrode body and a portion of the second tab body away from the first tab body through the accommodating cavity, the portion of the first tab body exposed to the opening is connected to the protective plate, and the size of the first tab body along the first direction is greater than the size of the second tab body along the first direction.

[0014] In one embodiment of the second aspect, a size of the opening along the first direction is smaller than a size of the first tab body along the first direction, and a size of the opening along the first direction is larger than a size of the second tab body along the first direction.

[0015] 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.

[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, 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] The beneficial effects of this application are as follows: The battery cell provided by the present application has a portion of the pole ear away from the electrode body that is encapsulated in the top seal, that is, the pole ear is contained in the top seal and does not extend from the top seal. At the same time, an opening is provided on the top seal to expose the pole ear, and the portion of the pole ear exposed in the opening is connected to the protective plate. In this way, when manufacturing the battery, since there is no portion of the pole ear extending from the top seal, the folding thickness of this portion 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, which is beneficial to improving the energy density of the battery.

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and understandable, preferred embodiments are specifically listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a battery in one embodiment of the present application from a first viewing angle is shown; Figure 2 A schematic diagram of the structure of a battery in an embodiment of the present application from a second viewing angle is shown; Figure 3 A schematic diagram of the structure of a battery from a first perspective in another embodiment of the present application is shown; Figure 4 A schematic diagram of the structure of a battery from a second perspective in another embodiment of the present application is shown; Figure 5 A schematic diagram of the structure of a battery cell in one embodiment of the present application from a first perspective is shown; Figure 6 Shows Figure 5 Schematic diagram of the local cross-sectional structure at AA in the middle; Figure 7 Shows Figure 5 A schematic diagram of the partial cross-sectional structure at the middle BB; Figure 8 Shows Figure 5 Schematic diagram of the enlarged structure of the middle C area; Fig. 9 A schematic diagram of the three-dimensional structure of a protection plate in one embodiment of the present application is shown; Fig.10 A schematic diagram showing the structure of a battery from a third perspective in another embodiment of the present application is shown; Fig.11A third perspective structural schematic diagram of a battery in yet another embodiment of the present application is shown.

[0024] Description of main component symbols: 1000-battery; 100-battery cell; 110-electrode assembly; 111-electrode body; 112-ear; 1121-first ear body; 1122-second ear body; 120-package; 121-package body; 1211-top wall; 1212-front side wall; 122-top seal; 123-accommodating cavity; 125-opening; 1251-first opening; 1252-second opening; 126-side seal; 200-protective plate; 210-narrow side; 220-wide side; X-first direction; Y-second direction; Z-third direction; S-thickness direction. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0026] In the description of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this application, the terms "first", "second", etc. are used to distinguish different objects and cannot be understood as indicating or implying a specific order or a primary and secondary relationship, or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the description of this application, the term "and / or" indicates that there may be three relationships. For example, A and / or B may indicate that A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0031] In the description of this application, "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the absolutely perpendicular situation, but also the roughly perpendicular situation conventionally recognized in engineering. For example, if the angle between two directions is 80°~90°, the two directions can be considered perpendicular; if the angle between two directions is 0°~10°, the two directions can be considered parallel.

[0032] The batteries in electronic devices are usually equipped with a protection circuit module (PCM), which is used to monitor the usage status of the battery cells to ensure the safety and performance of the battery cells.

[0033] When manufacturing existing batteries, the protection plate is connected to the portion of the tab of the battery cell extending out of the top sealing edge, and then the protection plate, the top sealing edge and the portion of the tab extending out of the top sealing edge are folded together to the top of the battery cell.

[0034] However, the folded thickness of the part of the tab extending out of the top seal 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 improving the energy density of the battery. In addition, since the tab extends out of the top seal, it is easy to short-circuit, so there is a greater safety risk.

[0035] In order to solve the above technical problems, Figure 1 and Figure 5 As shown, in the first aspect, an embodiment of the present application provides a battery cell 100, which relates to the field of battery technology and is mainly used in a battery 1000 with a protection board 200 for storing electrical energy and powering electronic devices.

[0036] Combination Figure 6 and Figure 7 As shown, the battery cell 100 provided in this embodiment includes an electrode assembly 110 and a packaging component 120 .

[0037] Among them, the electrode assembly 110 includes an electrode body 111 and a pole ear 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 accommodating cavity 123, and the electrode body 111 is encapsulated by the accommodating cavity 123, the part of the pole ear 112 away from the electrode body 111 is encapsulated in the top sealing edge 122, and an opening 125 is provided on the top sealing edge 122 to expose the pole ear 112, and the part of the pole ear 112 exposed to the opening 125 is used to connect with the protective plate 200.

[0038] Exemplarily, the connection between the protection plate 200 and the tab 112 may be welding, clamping, abutting, screw connection, etc., and no specific limitation is made here.

[0039] Illustratively, the opening 125 can be formed by laser cutting on the top edge 122 after the package 120 is manufactured. Of course, the opening 125 can also be reserved during the manufacturing process of the package 120, such as by pre-cutting or pre-stamping. No specific limitation is made on the formation method of the opening 125.

[0040] It is understandable that, in the battery cell 100 provided in this embodiment, the portion of the pole ear 112 away from the electrode body 111 is encapsulated in the top sealing edge 122, that is, the pole ear 112 is accommodated in the top sealing edge 122 and does not extend from the top sealing edge 122. At the same time, the top sealing edge 122 is provided with an opening 125 for exposing the pole ear 112, and the portion of the pole ear 112 exposed in the opening 125 is connected to the protective plate 200. In this way, when manufacturing the battery 1000, since there is no portion of the pole ear 112 extending from the top sealing edge 122, the folding 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 conducive to improving the energy density of the battery 1000.

[0041] In addition, with the above design, the tab 112 does not extend out of the top sealing edge 122 but is received in the top sealing edge 122 , thereby reducing the possibility of short circuit and improving the safety of the battery 1000 .

[0042] Exemplarily, the package 120 can be made of a package layer such as an aluminum-plastic film or a steel-plastic film. For example, when making the package 120, two grooves are formed on the package layer by a stamping process, and then the package layer is folded into two layers so that the two grooves are opposite to each other (hereinafter, the two layers are referred to as the first package layer and the second package layer), and the edges of the first package layer and the second package layer are sealed and connected, so that the two grooves enclose a receiving cavity 123 for receiving the electrode body 111, thereby forming the package 120.

[0043] like Figure 2 as well as Figures 4 to 6 As shown, the parts where the first packaging layer and the second packaging layer are sealed and connected to each other include a 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 packaging body 121, and the part where each side sealing edge 126 is connected to the top sealing edge 122 protrudes relative to the top wall 1211 of the packaging body 121, and the part of the pole ear 112 away from the electrode body 111 is accommodated in the top sealing edge 122, so as to be encapsulated by the interlayer in the top sealing edge 122, and the interlayer includes the part of the first packaging layer located at the top sealing edge 122 and the part of the second packaging layer located at the top sealing edge 122, which can be further understood as: the part of the pole ear 112 away from the electrode body 111 is clamped between the part of the first packaging layer located at the top sealing edge 122 and the part of the second packaging layer located at the top sealing edge 122.

[0044] Exemplarily, the electrode body 111 includes electrode plates and a diaphragm, the electrode plates include a first electrode plate and a second electrode plate, the first electrode plate and the second electrode plate have opposite polarities, that is, one of them is a positive electrode plate and the other is a negative electrode plate, the diaphragm is arranged between the first electrode plate and the second electrode plate to separate the first electrode plate and the second electrode plate, the electrode ear 112 includes a first electrode ear and a second electrode ear, the first electrode ear and the second electrode ear have opposite polarities, that is, one of them is a positive electrode ear and the other is a negative electrode ear, the positive electrode ear is connected to the positive electrode plate, and the negative electrode ear is connected to the negative electrode plate, thereby serving as the positive electrode and the negative electrode of the battery cell 100 respectively.

[0045] Of course, the electrode assembly 110 may also include an electrode sheet and a separator, the electrode sheet includes a positive electrode sheet and a negative electrode sheet, the separator is disposed between the positive electrode sheet and the negative electrode sheet, the positive electrode ear is a part of the positive electrode sheet, and the negative electrode ear is a part of the negative electrode sheet. For example, the positive electrode sheet includes an aluminum foil and a positive electrode active material, the positive electrode active material is coated on the coated area of ​​the aluminum foil, and the non-coated area of ​​the aluminum foil serves as the positive electrode ear, and the negative electrode sheet includes a copper foil and a negative electrode active material, the negative electrode active material is coated on the coated area of ​​the copper foil, and the non-coated area of ​​the copper foil serves as the negative electrode ear. The structure of the electrode assembly 110 is not specifically limited herein.

[0046] like Figure 1 , Figure 3 , Fig.10 and Fig.11 As shown, in a second aspect, an embodiment of the present application provides a battery 1000, comprising a protection plate 200 and a battery cell 100 in any embodiment of the first aspect described above.

[0047] Exemplarily, the protection board 200 includes a circuit board and electronic components arranged on the circuit board, the circuit board may be a printed circuit board (PCB) or a flexible printed circuit board (FPC), and the electronic components include connectors, memories, resistors, capacitors, positive temperature coefficient thermistors (PTC), negative temperature coefficient thermistors (NTC), etc. No specific restrictions are made on the structure of the protection board 200 herein.

[0048] It can be understood that since the battery 1000 provided in this embodiment has the battery cell 100 in any embodiment of the first aspect above, it has all the beneficial effects of the battery cell 100, which will not be described one by one here.

[0049] like Figure 1 and Figure 2 As 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.

[0050] 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.

[0051] 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 .

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] It is understandable that, by additionally adding the second opening 1252 disposed opposite to the first opening 1251 on the basis of the first opening 1251 , it is convenient to spot-weld the protection plate 200 and the tab 112 , so as to improve the reliability of welding.

[0057] like Figure 1 , Figure 2 and Fig. 9 As shown, in a specific embodiment, the protective plate 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 portion of the pole ear 112 exposed to the first opening 1251 is connected to the narrow side 210, and it can be understood that the protective 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 protective plate 200, making the structure of the battery 1000 more compact, thereby more effectively improving the space utilization rate at the top of the battery cell 100.

[0058] like Figure 3 , Figure 4 and Fig. 9As shown, in another specific embodiment, the protection plate 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 portion of the pole ear 112 exposed to the first opening 1251 is connected to the wide side 220, and it can be understood that the protection plate 200 and the top sealing edge 122 are parallel to each other. Such an arrangement is suitable for the case where the battery cell 100 is an ultra-thin battery cell. When a battery 1000 with an ultra-thin battery cell is manufactured, there is also no portion of the pole ear 112 extending out of the top sealing edge 122, which avoids the folding thickness of this portion occupying the top space of the ultra-thin battery cell, thereby improving the space utilization rate of the top of the ultra-thin battery cell.

[0059] It should be noted that when a welding pad is configured on the protection plate 200, the position of the welding pad can be set according to the above-mentioned arrangement. For example, when the portion of the pole ear 112 exposed to the first opening 1251 is connected to the narrow side 210 of the protection plate 200, the welding pad can be set on the narrow side 210 so as to be welded to the pole ear 112; when the portion of the pole ear 112 exposed to the first opening 1251 is connected to the wide side 220 of the protection plate 200, the welding pad can be set on the wide side 220 so as to be welded to the pole ear 112.

[0060] like Figures 5 to 9 As shown, further, the pole ear 112 includes a first pole ear body 1121 and a second pole ear body 1122 connected to each other, the second pole ear body 1122 is connected to the electrode body 111, the first pole ear body 1121 is encapsulated in the top sealing edge 122, the encapsulation body 121 encapsulates the electrode body 111 and the second pole ear body 1122 away from the first pole ear body 1121 through the accommodating cavity 123, the portion of the first pole ear body 1121 exposed to the opening 125 is connected to the protective plate 200, and the size of the first pole ear body 1121 along the first direction X is greater than the size of the second pole ear body 1122 along the first direction X.

[0061] It can be understood that by limiting the dimension L3 of the first pole ear body 1121 along the first direction X to be larger than the dimension L1 of the second pole ear body 1122 along the first direction X, that is, the size of the portion of the pole ear 112 encapsulated in the top seal 122 is increased in the first direction X, the contact area between the top seal 122 and the pole ear 112 can be increased, so that the top seal 122 can more reliably encapsulate the pole ear 112, thereby improving the sealing of the battery cell 100.

[0062] like Figure 8 As shown, further, the size of the opening 125 along the first direction X is smaller than the size of the first 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 tab body 1122 along the first direction X.

[0063] It can be understood that by limiting the dimension L2 of the opening 125 along the first direction X to be smaller than the dimension L3 of the first pole ear body 1121 along the first direction X, the dimension L2 of the opening 125 along the first direction X is larger than the dimension L1 of the second pole ear body 1122 along the first direction X. In this way, the contact area between the pole ear 112 and the protective plate 200 is increased, so that the electrical connection between the protective plate 200 and the electrode assembly 110 is more stable, and the pole ear 112 is not excessively exposed to affect the sealing of the battery cell 100.

[0064] 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 dimension of the first opening 1251 along the first direction X and the dimension of the second opening 1252 along the first direction X are both L2.

[0065] like Figure 5 , Figure 6 and Fig.10 As 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.

[0066] Combination Fig. 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.

[0067] 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.

[0068] 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.

[0069] like Figure 5 , Figure 6 and Fig.11 As 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 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, and the first opening 1251 is located on one side of the bent portion of the top sealing edge 122 along the third direction Z facing the top wall 1211, and the protective plate 200 is stacked between the bent portion of the top sealing edge 122 and the top wall 1211, and is connected to the portion of the pole ear 112 exposed to the first opening 1251.

[0070] Combination Fig. 9 As shown, it should be noted that "the protection plate 200 is stacked 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.

[0071] It can be understood that, since the top sealing edge 122 is bent toward 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, and the protection plate 200 is stacked between the bent portion of the top sealing edge 122 and the top wall 1211, this can also 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.

[0072] 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, and the second opening 1252 is arranged 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 toward the front side wall 1212 and spaced apart from 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 away from the top wall 1211 along the third direction Z.

[0073] In one embodiment, the battery 1000 further includes a sealant layer, which is connected to the protection plate 200 and the top sealing edge 122 .

[0074] Exemplarily, the material of the sealant layer may be silicone sealant, epoxy resin sealant, polyurethane sealant, hot melt adhesive, etc., and no specific limitation is made here.

[0075] It can be understood that when manufacturing the battery 1000, the protective plate 200 is connected to the portion of the pole ear 112 exposed to the opening 125, and then the top of the battery cell 100 is injected with glue to form a sealant layer to achieve overall sealing, and the protective plate 200 is fixed on the top sealing edge 122, thereby improving the stability of the protective plate 200.

[0076] Furthermore, the battery 1000 also includes an adhesive layer, which 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, so as to achieve integral winding and fixing of the battery cell 100 and the protection plate 200.

[0077] It should be noted that “the circumferential direction of the battery cell 100 ” may be understood as a direction surrounding the center line of the battery cell 100 . The center line of the battery cell 100 is parallel to the third direction Z and perpendicular to the first direction X and the second direction Y.

[0078] Exemplarily, the adhesive layer may be a layered structure having insulating and adhesive functions, such as adhesive paper or adhesive tape, and no specific limitation is made herein.

[0079] In a third aspect, an embodiment of the present application provides an electronic device, comprising a main board and a battery 1000 in any embodiment of the first aspect, wherein the main board is electrically connected to a protection board 200 of the battery 1000 .

[0080] It should be noted that electronic devices can be mobile phones, tablets, laptops, smart watches, e-book readers, drones, portable game consoles, wireless headphones, digital cameras, camcorders, electric toothbrushes and shavers, etc.

[0081] Of course, the above-mentioned battery 1000 can also be applied to other electrical equipment, such as vehicles, power tools, etc. The vehicle can be a fuel vehicle, a gas vehicle, a new energy vehicle, etc. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle and an extended-range vehicle, etc. The power tool can be a metal cutting power tool, a grinding power tool, an assembly power tool and a railway power tool, etc. No specific restrictions are made on the application scenarios of the above-mentioned battery 1000.

[0082] It can be understood that since the electronic device provided in this embodiment has the battery 1000 in any embodiment of the second aspect above, it has all the beneficial effects of the battery 1000, which will not be described one by one here.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction 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, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery cell, characterized in that: include: An electrode assembly (110) comprises an electrode body (111) and an electrode tab (112) connected to each other; A packaging component (120) comprises a packaging body (121) and a top sealing edge (122) connected to each other, the packaging body (121) having a receiving cavity (123), and the electrode body (111) is encapsulated by the receiving cavity (123), the portion of the electrode ear (112) away from the electrode body (111) is encapsulated in the top sealing edge (122), the top sealing edge (122) is provided with an opening (125) for exposing the electrode ear (112), and the portion of the electrode ear (112) exposed in the opening (125) is used for connecting to a protection plate (200).

2. A battery, characterized in that: It comprises a protection plate (200) and the battery cell according to claim 1, wherein the protection plate (200) is connected to a portion of the electrode tab (112) exposed to the opening (125).

3. The battery according to claim 2, characterized in that The battery cell 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 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).

4. The battery according to claim 3, characterized in that The opening (125) comprises 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).

5. The battery according to claim 4, characterized in that A welding pad is provided on the protection plate (200), and a portion of the pole ear (112) exposed to the first opening (1251) is welded to the welding pad; the opening (125) further comprises a second opening (1252), the second opening (1252) being located on a side of the top sealing edge (122) away from the welding 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).

6. The battery according to claim 4, characterized in that The protection plate (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 is perpendicular to the first direction (X) and the second direction (Y), and the portion of the tab (112) exposed to the first opening (1251) is connected to the narrow side (210).

7. The battery according to claim 4, characterized in that The protection plate (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), and the portion of the tab (112) exposed to the first opening (1251) is connected to the wide side (220).

8. The battery according to claim 3, characterized in that The electrode tab (112) comprises a first electrode tab body (1121) and a second electrode tab body (1122) connected to each other, the second electrode tab body (1122) being connected to the electrode body (111), the first electrode tab body (1121) being encapsulated in the top sealing edge (122), the encapsulation body (121) encapsulating the electrode body (111) and a portion of the second electrode tab body (1122) away from the first electrode tab body (1121) through the accommodating cavity (123), the portion of the first electrode tab body (1121) exposed to the opening (125) being connected to the protective plate (200), and the size of the first electrode tab body (1121) along the first direction (X) being larger than the size of the second electrode tab body (1122) along the first direction (X).

9. The battery according to claim 8, 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).

10. The battery according to claim 2, characterized in that The battery cell 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 (1212). ) direction and is arranged to fit the top wall (1211), the opening (125) comprising a first opening (1251), the first opening (1251) being 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) being 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 being connected to a portion of the pole lug (112) exposed to the first opening (1251).

11. The battery according to claim 2, characterized in that The battery cell 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) is bent in a direction toward the front side wall (1212); The bent portion of the top sealing edge (122) and the top wall (1211) are arranged at intervals along the third direction (Z); 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) facing the top wall (1211) along the third direction (Z); the protection plate (200) is stacked between the bent portion of the top sealing edge (122) and the top wall (1211), and is connected to a portion of the tab (112) exposed to the first opening (1251).

12. The battery according to any one of claims 2 to 11, characterized in that The battery further comprises a sealant layer, wherein the sealant layer is connected to the protection plate (200) and the top sealing edge (122).

13. The battery according to claim 12, characterized in that The battery further comprises an adhesive layer, the adhesive layer being wound around the circumference of the battery core to cover the top sealing edge (122), the protective plate (200) and the sealant layer.

14. An electronic device, characterized in that: It comprises a main board and a battery according to any one of claims 2 to 13, wherein the main board is electrically connected to the protection board (200).

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