Battery cell, battery and electronic device

Abstract

This application provides a battery cell, a battery, and an electronic device, relating to the field of battery technology. The battery cell includes an electrode assembly and a package. The electrode assembly includes an electrode body and tabs, with one side of the tabs connected to the electrode body. The package includes a package body and a top seal edge. The package body has a receiving cavity and encapsulates the electrode body through the receiving cavity. One side of the top seal edge is connected to the package body. A notch is provided on the portion of the top seal edge away from the package body. The portion of the tab away from the electrode body extends through the top seal edge to the outside of the package. The portion of the tab extending outside the package is located within the notch, and this portion is used to connect to a protection board. The battery cell provided in this application, through the notch on the top seal edge, provides space for the connection between the tabs and the protection board, thus shortening the length of the portion of the tab extending outside the package, thereby reducing the space occupied by this portion on the top of the battery and improving the energy density of the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery cell, battery, and electronic device. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Batteries in electronic devices are typically equipped with a Protection Circuit Module (PCM) to monitor the cell's operating status, thereby ensuring the cell's safety and performance. In existing batteries, the cell's tabs extend beyond the top seal, and the PCM connects to the portion of the tabs that extends beyond the seal. However, the portion of the tabs extending beyond the seal occupies space at the top of the battery, reducing space utilization and hindering improvements in battery energy density. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cell, battery and electronic device, which aims to solve the technical problem of how to improve the space utilization of the top of the battery to increase the energy density of the battery.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery cell, comprising:

[0007] An electrode assembly includes an electrode body and a tab, one side of which is connected to the electrode body;

[0008] The package includes a package body and a top seal edge. The package body has a receiving cavity and encapsulates the electrode body through the receiving cavity. One side of the top seal edge is connected to the package body. A notch is provided on the portion of the top seal edge away from the package body. The portion of the electrode tab away from the electrode body is disposed through the top seal edge to extend outside the package body. The portion of the electrode tab extending outside the package body is located within the notch. The portion of the electrode tab located within the notch is used to connect with a protective plate.

[0009] Secondly, embodiments of this application provide a battery including a protection plate and a cell as described in any of the embodiments of the first aspect above. The package includes a top wall, a top sealing edge is connected to the top wall, and the protection plate is connected to the portion of the electrode located within the notch.

[0010] In one embodiment of the second aspect, the package further includes an outer peripheral wall having a first wall and a second wall disposed opposite to each other, the first wall and the second wall being respectively connected to the top wall, the top sealing edge being disposed close to the second wall, the protective plate being located on the side of the top sealing edge facing the first wall, and the notch including a first notch being located on the side of the top sealing edge facing the first wall.

[0011] In one embodiment of the second aspect, the notch further includes a second notch located on the side of the top sealing edge facing the second wall, and the second notch and the first notch are disposed opposite to each other.

[0012] In one embodiment of the second aspect, the protective plate has a narrow side and a wide side perpendicular to each other, the wide side facing the top wall and being disposed in contact with the top wall, the narrow side facing the top sealing edge and being disposed in contact with the top sealing edge, and the narrow side being connected to the portion of the electrode tab located within the first notch.

[0013] In one embodiment of the second aspect, the protective plate has a narrow side and a wide side perpendicular to each other, the narrow side facing the top wall and being disposed in contact with the top wall, the wide side facing the top sealing edge and being disposed in contact with the top sealing edge, and the wide side being connected to the portion of the electrode tab located within the first notch.

[0014] In one embodiment of the second aspect, the package further includes an outer peripheral wall having a first wall and a second wall disposed opposite to each other, the first wall and the second wall being respectively connected to the top wall, the portion of the top sealing edge away from the package being bent toward the first wall, and the protective plate being stacked between the bent portion of the top sealing edge and the top wall.

[0015] In one embodiment of the second aspect, the package further includes an outer peripheral wall having a first wall and a second wall disposed opposite to each other, the first wall and the second wall being connected to the top wall respectively, the portion of the top sealing edge away from the package being bent toward the first wall and stacked on the top wall, and the protective plate being stacked on the side of the bent portion of the top sealing edge away from the top wall.

[0016] In one embodiment of the second aspect, the width of the tab is L1, and the dimension of the notch in the width direction of the tab is L2, satisfying: L1 > L2.

[0017] In one embodiment of the second aspect, the battery further includes an injection-molded plastic part, wherein the portion of the top wall, the protective plate, and the tab located within the notch constitutes the top of the battery, and the plastic part is respectively connected to the portion of the top wall, the protective plate, and the tab located within the notch to seal the top of the battery.

[0018] Thirdly, embodiments of this application provide an electronic device, including a motherboard and a battery as described in any of the embodiments of the second aspect above, wherein the motherboard is electrically connected to the protection board.

[0019] The beneficial effects of this application are as follows:

[0020] This application provides a battery cell, including an electrode assembly and a package. The package body encapsulates the electrode body of the electrode assembly through a receiving cavity. A notch is provided on the top edge of the package body away from the package body. The tabs of the electrode assembly, away from the electrode body, extend beyond the package body through the top edge. The portion of the tab extending beyond the package body is located within the notch and is used to connect with a protection plate. The notch on the top edge provides space for the connection between the tab and the protection plate, shortening the length of the tab extending beyond the package body. This reduces the space occupied by this portion on the top of the battery, improving the space utilization of the top of the battery and contributing to increased energy density.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This illustration shows a schematic diagram of the battery assembly structure from one perspective in one embodiment of this application;

[0024] Figure 2 This invention provides a schematic diagram of the battery assembly structure from another perspective in one embodiment of the present application.

[0025] Figure 3 A schematic diagram of the battery assembly structure from one perspective is shown in another embodiment of this application;

[0026] Figure 4This invention provides a schematic diagram of the battery assembly structure from another perspective in another embodiment of the present application.

[0027] Figure 5 This paper shows a schematic diagram of the battery cell assembly structure from one perspective in one embodiment of the present application;

[0028] Figure 6 It shows Figure 5 A schematic diagram of a partial cross-sectional view at point AA;

[0029] Figure 7 It shows Figure 5 A schematic diagram of a partial cross-sectional structure at point BB;

[0030] Figure 8 This invention provides a schematic diagram of the battery assembly structure from one perspective in another embodiment of the present application.

[0031] Figure 9 This shows a schematic diagram of the battery assembly structure from one perspective in yet another embodiment of this application;

[0032] Figure 10 A three-dimensional structural schematic diagram of the protective plate in one embodiment of this application is shown.

[0033] Explanation of key component symbols:

[0034] 1000 - Battery; 100 - Cell; 110 - Electrode assembly; 111 - Electrode body; 112 - Tab; 120 - Package; 121 - Package body; 1211 - Receiving cavity; 1212 - Top wall; 1213 - Bottom wall; 1214 - Outer peripheral wall; 12141 - First wall; 12142 - Second wall; 12143 - Third wall; 12144 - Fourth wall; 122 - Top sealing edge; 123 - Notch; 1231 - First notch; 1232 - Second notch; 124 - First side sealing edge; 125 - Second side sealing edge; 200 - Protective plate; 210 - Narrow face; 220 - Wide face; S - Thickness direction; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0035] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0036] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this 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 hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0039] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In the description of this application, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0041] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0042] Batteries in electronic devices such as mobile phones, tablets, and laptops are usually equipped with a Protection Circuit Module (PCM) to monitor the usage status of the battery cells, thereby ensuring the safety and performance of the battery cells.

[0043] In existing batteries, the tabs of the cell are installed through the top seal edge to extend beyond the package. The protection plate is connected to the portion of the tabs extending beyond the package, and the portion of the tabs extending beyond the package, the top seal edge, and the protection plate are folded together to the top of the battery. However, the portion of the tabs extending beyond the package occupies space on the top of the battery, reducing the space utilization rate of the top of the battery, which is not conducive to improving the energy density of the battery.

[0044] like Figure 1 , Figure 5 and Figure 10 As shown, in a first aspect, embodiments of this application provide a battery cell 100, relating to the field of battery technology, mainly applied in a battery 1000 with a protection board 200, for storing electrical energy and supplying power to electronic devices. It should be noted that, for ease of understanding the drawings and description of this application, the battery cell 100 is defined herein to have a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other in pairs, and the protection board 200 has a thickness direction S.

[0045] Combination Figure 6 and Figure 7 As shown, the battery cell 100 provided in this embodiment includes an electrode assembly 110 and a package 120.

[0046] The electrode assembly 110 includes an electrode body 111 and a tab 112, with one side of the tab 112 connected to the electrode body 111. The package 120 includes a package body 121 and a top sealing edge 122. The package body 121 has a receiving cavity 1211, and the package body 121 encapsulates the electrode body 111 through the receiving cavity 1211. One side of the top sealing edge 122 is connected to the package body 121. A notch 123 is provided on the portion of the top sealing edge 122 away from the package body 121. The portion of the tab 112 away from the electrode body 111 passes through the top sealing edge 122 and extends beyond the package 120. The portion of the tab 112 extending beyond the package 120 is located within the notch 123. The portion of the tab 112 located within the notch 123 is used to connect with the protection plate 200.

[0047] For example, the connection between the protection plate 200 and the tab 112 can be selected by welding, snap-fitting, abutting, screw connection, etc., without specific limitations.

[0048] It should be noted that the notch 123 can be formed by laser cutting on the top sealing edge 122 after the package 120 is manufactured; of course, the notch 123 can also be reserved during the manufacturing process of the package 120, such as by pre-cutting or pre-stamping. No specific restrictions are placed on the formation method of the notch 123 here.

[0049] It is understood that the battery cell 100 provided in this embodiment, through the notch 123 provided on the top sealing edge 122, leaves space for the connection between the tab 112 and the protection plate 200, so that the length of the part of the tab 112 extending outside the package 120 is shortened, thereby reducing the space occupied by this part on the top of the battery 1000, thereby improving the space utilization rate of the top of the battery 1000, which is conducive to improving the energy density of the battery 1000.

[0050] For example, the package 120 can be made of an encapsulation layer such as aluminum-plastic film or steel-plastic film. For instance, when making the package 120, two grooves are first formed on the encapsulation layer by a stamping process. Then, the encapsulation layer is folded into two layers so that the two grooves face each other (hereinafter referred to as the first encapsulation layer and the second encapsulation layer). The edges of the first encapsulation layer and the second encapsulation layer are sealed and connected (hot-pressed or bonded) so that the two grooves enclose and form a receiving cavity 1211 for accommodating the electrode body 111, thereby forming the package 120.

[0051] like Figure 2 as well as Figures 4 to 6As shown, the portion where the first and second encapsulation layers are sealed together includes a top sealing edge 122, a first side sealing edge 124, and a second side sealing edge 125. The top sealing edge 122 is connected between the first side sealing edge 124 and the second side sealing edge 125. The top sealing edge 122 is connected to the top wall 1212 of the encapsulation body 121 and protrudes from the top wall 1212. The position where the top sealing edge 122 connects to the top wall 1212 is closer to the second wall 12142 of the encapsulation body 121 and farther from the first wall 12141. The first side sealing edge 124 is located on the third wall 12143 of the encapsulation body 121, and the second side sealing edge 125 is located on the third wall 12143 of the encapsulation body 121. On the fourth wall 12144 of 1, the portion where the first side sealing edge 124 connects to the top sealing edge 122 and the portion where the second side sealing edge 125 connects to the top sealing edge 122 both protrude relative to the top wall 1212 of the package body 121. The portion of the tab 112 away from the electrode body 111 passes through the interlayer of the top sealing edge 122. The interlayer includes the portion of the first encapsulation layer located on the top sealing edge 122 and the portion of the second encapsulation layer located on the top sealing edge 122. It can be further understood that the portion of the tab 112 away from the electrode body 111 is sandwiched between the portion of the first encapsulation layer located on the top sealing edge 122 and the portion of the second encapsulation layer located on the top sealing edge 122.

[0052] For example, the electrode body 111 includes an electrode sheet and a separator. The electrode sheet includes a first electrode sheet and a second electrode sheet, which have opposite polarities, i.e., one of them is a positive electrode sheet and the other is a negative electrode sheet. The separator is disposed between the first electrode sheet and the second electrode sheet to separate them. The tab 112 includes a first tab and a second tab, which have opposite polarities, i.e., one of them is a positive tab and the other is a negative tab. The positive tab is connected to the positive electrode sheet, and the negative tab is connected to the negative electrode sheet, thereby serving as the positive and negative electrodes of the battery cell 100, respectively.

[0053] Alternatively, the electrode assembly 110 can include an electrode sheet and a separator. The electrode sheet includes a positive electrode sheet and a negative electrode sheet, and the separator is disposed between the positive and negative electrode sheets. The positive electrode tab is part of the positive electrode sheet, and the negative electrode tab is part of the negative electrode sheet. For example, the positive electrode sheet includes an aluminum foil and a positive active material, with the positive active material coated on the coated area of ​​the aluminum foil, and the uncoated area of ​​the aluminum foil serving as the positive electrode tab. The negative electrode sheet includes a copper foil and a negative active material, with the negative active material coated on the coated area of ​​the copper foil, and the uncoated area of ​​the copper foil serving as the negative electrode tab. No specific limitations are placed on the structure of the electrode assembly 110 here.

[0054] like Figure 1 , Figure 3 , Figure 8 and Figure 9 As shown, in a second aspect, embodiments of this application provide a battery 1000, including a protection board 200 and a cell 100 as described in any of the embodiments of the first aspect above.

[0055] The package 121 includes a top wall 1212 and a top sealing edge 122 connected to the top wall 1212, and the protective plate 200 and the tab 112 are connected within the notch 123.

[0056] For example, 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). Electronic components include connectors, memory, resistors, capacitors, positive temperature coefficient thermistors (PTC), negative temperature coefficient thermistors (NTC), etc. No specific limitations are placed on the structure of the protection board 200 here. Figure 10 As shown, the protection board 200 has a thickness direction S, which refers to the thickness direction of the circuit board.

[0057] It is understood that since the battery 1000 provided in this embodiment has the same advantages as the cell 100 in any of the embodiments of the first aspect, it has all the advantages of the cell 100, which will not be described in detail here.

[0058] like Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment, the package 121 further includes an outer peripheral wall 1214, the outer peripheral wall 1214 having a first wall 12141 and a second wall 12142 disposed opposite to each other, the first wall 12141 and the second wall 12142 being connected to the top wall 1212 respectively, the top sealing edge 122 being disposed close to the second wall 12142, the protective plate 200 being located on the side of the top sealing edge 122 facing the first wall 12141, and the notch 123 including a first notch 1231 being located on the side of the top sealing edge 122 facing the first wall 12141.

[0059] Understandably, since the first notch 1231 and the protective plate 200 are both located on the side of the top sealing edge 122 facing the first wall 12141, and the setting of the first notch 1231 shortens the length of the part of the tab 112 extending outside the package 120, under this structural design, it is not necessary to fold the top sealing edge 122, the part of the tab 112 extending outside the package 120 and the protective plate 200 together to the top of the battery 1000, thereby reducing the manufacturing process of the battery 1000.

[0060] like Figures 5 to 7 as well as Figure 10As shown, the notch 123 further includes a second notch 1232, which is located on the side of the top sealing edge 122 facing the second wall 12142. The second notch 1232 and the first notch 1231 are arranged opposite to each other.

[0061] It is understandable that the first notch 1231 facilitates the welding between the tab 112 and the protective plate 200. By adding a second notch 1232 that is opposite to the first notch 1231, it is easier to spot weld the protective plate 200 and the tab 112, thereby improving the reliability of the welding.

[0062] like Figure 1 , Figure 2 and Figure 10 As shown, in a specific embodiment, the protective plate 200 has a narrow surface 210 and a wide surface 220 that are perpendicular to each other. The wide surface 220 faces the top wall 1212 and is attached to the top wall 1212. The narrow surface 210 faces the top sealing edge 122 and is attached to the top sealing edge 122. The narrow surface 210 is connected to the portion of the tab 112 located within the first notch 1231.

[0063] It is understandable that, since the wide side 220 of the protection plate 200 faces the top wall 1212 and is attached to the top wall 1212, and the narrow side 210 of the protection plate 200 faces the top sealing edge 122 and is attached to the top sealing edge 122, it can be understood that the protection plate 200 is stacked on the top wall 1212. That is, the thickness direction S of the protection plate 200 is parallel to the third direction Z of the cell 100 and perpendicular to the first direction X and the second direction Y of the cell 100. This arrangement can effectively reduce the space occupied by the protection plate 200 on the top of the battery 1000, making the structure of the battery 1000 more compact, thereby more effectively improving the space utilization rate of the top of the battery 1000.

[0064] like Figure 3 and Figure 4 As shown, in another specific embodiment, the protective plate 200 has a narrow surface 210 and a wide surface 220 that are perpendicular to each other. The narrow surface 210 faces the top wall 1212 and is attached to the top wall 1212. The wide surface 220 faces the top sealing edge 122 and is attached to the top sealing edge 122. The wide surface 220 is connected to the portion of the tab 112 located within the first notch 1231.

[0065] It is understandable that, since the narrow side 210 of the protection plate 200 faces the top wall 1212 and is attached to the top wall 1212, and the wide side 220 of the protection plate 200 faces the top sealing edge 122 and is attached to the top sealing edge 122, it can be understood that the protection plate 200 is stacked on the top sealing edge 122. That is, the thickness direction S of the protection plate 200 is parallel to the second direction Y of the cell 100 and perpendicular to the first direction X and the third direction Z of the cell 100. This arrangement is suitable for the case where the cell 100 is an ultra-thin cell. When manufacturing a battery 1000 with an ultra-thin cell, the length of the part of the tab 112 extending outside the package 120 is also shortened, reducing the space occupied by this part on the top of the battery 1000.

[0066] like Figure 5 and Figure 8 As shown, in another embodiment, the package 121 further includes an outer peripheral wall 1214, the outer peripheral wall 1214 having a first wall 12141 and a second wall 12142 disposed opposite to each other, the first wall 12141 and the second wall 12142 being connected to the top wall 1212 respectively, the portion of the top sealing edge 122 away from the package 121 being bent toward the first wall 12141, and the protective plate 200 being stacked between the bent portion of the top sealing edge 122 and the top wall 1212.

[0067] Combination Figure 10 As shown, it should be noted that "the protective plate 200 is stacked between the bent part of the top sealing edge 122 and the top wall 1212" can be understood as: the protective plate 200 is located in the gap formed between the bent part of the top sealing edge 122 and the top wall 1212, and the thickness direction S of the protective plate 200 is parallel to the third direction Z of the cell 100, and perpendicular to the first direction X and the second direction Y of the cell 100.

[0068] Understandably, the portion of the top sealing edge 122 away from the package 121 is bent toward the first wall 12141, while the protective plate 200 is stacked between the bent portion of the top sealing edge 122 and the top wall 1212. This bending and stacking design reduces the space occupied by the top sealing edge 122 and the protective plate 200 on the top of the battery 1000, thereby further improving the space utilization rate of the top of the battery 1000.

[0069] like Figure 5 and Figure 9As shown, in another embodiment, the package 121 further includes an outer peripheral wall 1214, which has a first wall 12141 and a second wall 12142 disposed opposite to each other. The first wall 12141 and the second wall 12142 are respectively connected to the top wall 1212. The portion of the top sealing edge 122 away from the package 121 is bent toward the first wall 12141 and stacked on the top wall 1212. The protective plate 200 is stacked on the side of the bent portion of the top sealing edge 122 away from the top wall 1212.

[0070] Combination Figure 10 As shown, it should be noted that "the protective plate 200 is stacked on the side of the top sealing edge 122 that is bent away from the top wall 1212" can be understood as: the thickness direction S of the protective plate 200 is parallel to the third direction Z of the cell 100, and perpendicular to the first direction X and the second direction Y of the cell 100.

[0071] Understandably, the portion of the top sealing edge 122 away from the encapsulation body 121 is bent towards the first wall 12141 and stacked on the top wall 1212. Simultaneously, the protective plate 200 is stacked on the side of the bent portion of the top sealing edge 122 that faces away from the top wall 1212. This bending and stacking design also reduces the space occupied by the top sealing edge 122 and the protective plate 200 on the top of the battery 1000, thereby further improving the space utilization rate of the top of the battery 1000.

[0072] It should be noted that the encapsulation body 121 also includes a bottom wall 1213 disposed opposite to the top wall 1212, and the outer peripheral wall 1214 also has a third wall 12143 and a fourth wall 12144 disposed opposite to each other. The first wall 12141, the second wall 12142, the third wall 12143 and the fourth wall 12144 are disposed along the circumference of the electrode body 111 and are all connected between the top wall 1212 and the bottom wall 1213. The first wall 12141, the second wall 12142, the third wall 12143, the fourth wall 12144, the top wall 1212 and the bottom wall 1213 enclose to form the aforementioned receiving cavity 1211 for encapsulating the electrode body 111.

[0073] like Figure 5 As shown, in one embodiment, the width of the tab 112 is L1, and the dimension of the notch 123 in the width direction of the tab 112 is L2, satisfying: L1 > L2. This dimensional design can reduce the interference of the top sealing edge 122 when connecting the tab 112 and the protective plate 200, so that the tab 112 and the protective plate 200 have sufficient contact area to improve the reliability of the connection.

[0074] like Figure 5 and Figure 6As shown, it should be noted that when the notch 123 includes the first notch 1231 and the second notch 1232, the dimension L2 of the notch 123 in the width direction of the tab 112 can be understood as: the dimension of the first notch 1231 in the width direction of the tab 112 and / or the dimension of the second notch 1232 in the width direction of the tab 112 is L2, that is, the dimension of the first notch 1231 in the width direction of the tab 112 is L2, or the dimension of the second notch 1232 in the width direction of the tab 112 is L2, or the dimension of the first notch 1231 in the width direction of the tab 112 and the dimension of the second notch 1232 in the width direction of the tab 112 are both L2.

[0075] In one embodiment, the battery 1000 further includes an injection-molded plastic part, the portion of the top wall 1212, the protective plate 200, and the tab 112 located within the notch 123 constitutes the top of the battery 1000, and the plastic part is connected to the portion of the top wall 1212, the protective plate 200, and the tab 112 located within the notch 123 to seal the top of the battery 1000.

[0076] Understandably, when manufacturing the battery 1000, the protection board 200 and the portion of the tab 112 located within the notch 123 are first connected. Then, plastic is injected into the top of the battery 1000 to form a plastic part, thereby achieving an overall seal on the top of the battery 1000. This reduces the risk of short circuits in the battery 1000 and fixes the protection board 200, the top sealing edge 122, the portion of the tab 112 located within the notch 123, and the top wall 1212 together, improving the structural stability of the battery 1000.

[0077] Thirdly, embodiments of this application provide an electronic device, including a motherboard and a battery 1000 as described in any of the embodiments of the first aspect above, wherein the motherboard is electrically connected to a protection board 200 of the battery 1000.

[0078] It should be noted that electronic devices can include mobile phones, tablets, laptops, smartwatches, e-book readers, portable game consoles, wireless headphones, digital cameras, camcorders, electric toothbrushes, and razors, etc.

[0079] Of course, the aforementioned battery 1000 can also be applied to other electrical equipment, such as vehicles, spacecraft, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, and new energy vehicles, including pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles; spacecraft can be drones, airplanes, and rockets; power tools can be metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, etc. No specific limitations are made on the application scenarios of the aforementioned battery 1000.

[0080] It is understood that since the electronic device provided in this embodiment has the battery 1000 in any of the embodiments of the second aspect described above, it has all the beneficial effects of the battery 1000, which will not be described in detail here.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0082] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery cell, characterized in that, include: An electrode assembly (110) includes an electrode body (111) and a tab (112), one side of which is connected to the electrode body (111). The package (120) includes a package body (121) and a top sealing edge (122). The package body (121) has a receiving cavity (1211) and encapsulates the electrode body (111) through the receiving cavity (1211). One side of the top sealing edge (122) is connected to the package body (121). A notch (123) is provided on the portion of the top sealing edge (122) away from the package body (121). The portion of the tab (112) away from the electrode body (111) passes through the top sealing edge (122) and extends beyond the package (120). The portion of the tab (112) extending beyond the package (120) is located within the notch (123). The portion of the tab (112) located within the notch (123) is used to connect with a protective plate (200).

2. A battery, characterized in that, The package includes a protective plate (200) and the battery cell as described in claim 1. The package (121) includes a top wall (1212), the top sealing edge (122) is connected to the top wall (1212), and the protective plate (200) is connected to the portion of the tab (112) located within the notch (123).

3. The battery according to claim 2, characterized in that, The encapsulation body (121) further includes an outer peripheral wall (1214), the outer peripheral wall (1214) having a first wall (12141) and a second wall (12142) disposed opposite to each other, the first wall (12141) and the second wall (12142) being connected to the top wall (1212) respectively, the top sealing edge (122) being disposed close to the second wall (12142), the protective plate (200) being located on the side of the top sealing edge (122) facing the first wall (12141), and the notch (123) including a first notch (1231), the first notch (1231) being located on the side of the top sealing edge (122) facing the first wall (12141).

4. The battery according to claim 3, characterized in that, The notch (123) also includes a second notch (1232), which is located on the side of the top sealing edge (122) facing the second wall (12142), and the second notch (1232) and the first notch (1231) are arranged opposite to each other.

5. The battery according to claim 3, characterized in that, The protective plate (200) has a narrow surface (210) and a wide surface (220) perpendicular to each other. The wide surface (220) faces the top wall (1212) and is fitted to the top wall (1212). The narrow surface (210) faces the top sealing edge (122) and is fitted to the top sealing edge (122). The narrow surface (210) is connected to the portion of the tab (112) located within the first notch (1231).

6. The battery according to claim 3, characterized in that, The protective plate (200) has a narrow surface (210) and a wide surface (220) perpendicular to each other. The narrow surface (210) faces the top wall (1212) and is fitted to the top wall (1212). The wide surface (220) faces the top sealing edge (122) and is fitted to the top sealing edge (122). The wide surface (220) is connected to the portion of the tab (112) located within the first notch (1231).

7. The battery according to claim 2, characterized in that, The package (121) further includes an outer peripheral wall (1214), which has a first wall (12141) and a second wall (12142) disposed opposite to each other. The first wall (12141) and the second wall (12142) are respectively connected to the top wall (1212). The portion of the top sealing edge (122) away from the package (121) is bent toward the first wall (12141). The protective plate (200) is stacked between the bent portion of the top sealing edge (122) and the top wall (1212).

8. The battery according to claim 2, characterized in that, The package (121) further includes an outer peripheral wall (1214), which has a first wall (12141) and a second wall (12142) disposed opposite to each other. The first wall (12141) and the second wall (12142) are respectively connected to the top wall (1212). The portion of the top sealing edge (122) away from the package (121) is bent toward the first wall (12141) and stacked on the top wall (1212). The protective plate (200) is stacked on the side of the bent portion of the top sealing edge (122) away from the top wall (1212).

9. The battery according to any one of claims 2 to 8, characterized in that, The width of the tab (112) is L1, and the dimension of the notch (123) in the width direction of the tab (112) is L2, satisfying: L1 > L2.

10. The battery according to any one of claims 2 to 8, characterized in that, The battery also includes an injection-molded plastic part, the top wall (1212), the protective plate (200) and the tab (112) located within the notch (123) constitute the top of the battery, and the plastic part is connected to the top wall (1212), the protective plate (200) and the tab (112) located within the notch (123) to seal the top of the battery.

11. An electronic device, characterized in that, It includes a motherboard and a battery according to any one of claims 2 to 10, wherein the motherboard is electrically connected to the protection board (200).

Images