Battery cell and electronic device

Abstract

A battery cell (100) and an electronic device. The battery cell (100) comprises a cell core (110), a first tab (120), a second tab (130), and a packaging member (150). The first tab (120) and the second tab (130) are separately connected to the cell core (110), and the first tab (120) and the second tab (130) are located on a same side of the cell core (110); the packaging member (150) comprises a cell accommodating part (151) and a second packaging part (152), the second packaging part (152) is in communication with the cell accommodating part (151), the second packaging part (152) extends away from the cell accommodating part (151) in a first direction and, in a second direction, the size of the second packaging part (152) is less than the size of the cell accommodating part (151); and the first tab (120) and the second tab (130) are each provided with a bending part (140), the bending parts (140) extend in the thickness direction of the cell core (110), the cell core (110) is accommodated in the cell accommodating part (151), and the bending parts (140) are both accommodated in the second packaging part (152). The battery cell (100) can mitigate the problem that during existing battery packaging, the energy density of the battery is affected by a large space wasted between the cell core (110) and a casing. The electronic device comprising the battery cell (100) has a stronger endurance capability.

Description

Single battery and electronic equipment Technical Field

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

[0002] Batteries are widely used in various electronic products, such as mobile phones and laptops. With the continuous upgrading of these products, improving battery energy density has become a major trend in battery development. In actual production, improvements to the battery cell structure or casing are often made to increase the space utilization of the packaged battery and reduce the space wasted in the battery casing to increase the battery's energy density.

[0003] In related art, when packaging a battery, the tabs are folded and placed inside the casing to reduce the space occupied by the tabs and increase the battery's energy density. However, this method leaves the space between the battery cell and the casing unused where the tabs are not located, resulting in significant space waste and a reduction in the battery's energy density.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a single battery that can improve the problem of large space waste between the battery cell and the shell during the existing battery packaging, which affects the battery energy density.

[0006] The present application also provides an electronic device having the above-mentioned single battery.

[0007] According to the single battery of the embodiment of the first aspect of the present application, the single battery includes a battery cell, a first pole tab, a second pole tab and a packaging component, the first pole tab is connected to the battery cell; the second pole tab is connected to the battery cell, and the first pole tab and the second pole tab are located on the same side of the battery cell; the packaging component includes a battery cell accommodating portion and a pole tab packaging portion, the pole tab packaging portion is connected to the battery cell accommodating portion, the pole tab packaging portion extends away from the battery cell accommodating portion along a first direction, and along a second direction, the size of the pole tab packaging portion is smaller than the size of the battery cell accommodating portion, and the first direction and the second direction are perpendicular; wherein, the first pole tab and the second pole tab are both provided with a bending portion, the bending portion extends along the thickness direction of the battery cell, the battery cell is accommodated in the battery cell accommodating portion, and each of the bending portions is accommodated in the pole tab packaging portion.

[0008] According to the single cell of the embodiment of the present application, there are at least the following beneficial effects: in the single cell, the first pole tab and the second pole tab are respectively connected to the same side of the battery cell. When the single cell is used in a device, the device can set an input terminal corresponding to the position of the first pole tab and the second pole tab of the battery cell to electrically connect the first pole tab and the second pole tab to ensure power supply, thereby improving the rationality of the layout of various parts in the device and the convenience of installing the single cell. During the packaging process, when the battery cell, the first pole tab, the second pole tab and the packaging part are packaged, the battery cell is accommodated in the battery cell accommodating part of the packaging part, and each bending part is accommodated in the pole tab packaging part extending away from the battery cell accommodating part along the first direction. Furthermore, the battery cell accommodating part and the pole tab packaging part of the packaging part can be designed according to the actual size of the battery cell, the first pole tab and the second pole tab respectively, which improves the design of the packaging part size based on the space size required by the bending part, resulting in space waste caused by the single cell not having a pole tab area after packaging. Ultimately, this method can not only improve the energy density of the single battery after packaging, but also reduce the empty space between the battery cell and the packaging component in the area where the tab is not set, making the overall structure of the single battery cell after packaging more compact, and the battery cell is not easy to shake in the battery cell accommodating part, and the single battery is more stable.

[0009] In addition, along the second direction, the size of the tab packaging portion is smaller than the size of the cell accommodating portion, which reduces the volume of the single battery after packaging and facilitates the positioning of the tab and cell packaging, thereby improving packaging accuracy and packaging speed.

[0010] According to some embodiments of the present application, the tab packaging portion includes a first packaging portion and a second packaging portion, the first tab is accommodated in the first packaging portion, and the second tab is accommodated in the second packaging portion; wherein the first packaging portion and the second packaging portion are spaced apart along the second direction.

[0011] According to some embodiments of the present application, along the second direction, edges of the first packaging portion and the second packaging portion that are opposite to each other are respectively flush with edges of the battery cell accommodating portion.

[0012] According to some embodiments of the present application, an accommodating cavity is defined between any edge of the first pole tab along the second direction and the inner side wall opposite to the first packaging portion, and the size of the accommodating cavity along the second direction is 2.0 mm to 15.0 mm; and / or, an accommodating cavity is defined between any edge of the second pole tab along the second direction and the inner side wall opposite to the second packaging portion, and the size of the accommodating cavity along the second direction is 2.0 mm to 15.0 mm.

[0013] According to some embodiments of the present application, the battery cell includes a battery cell body, a first pole ear portion and a second pole ear portion, the first pole ear portion and the second pole ear portion are connected to the battery cell body and both protrude from the battery cell body, the first pole ear portion is connected to the first pole ear, and the second pole ear portion is connected to the second pole ear; the first pole ear portion protrudes from the first pole ear along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity; and / or the second pole ear portion protrudes from the second pole ear along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity.

[0014] According to some embodiments of the present application, the tab packaging portion has a tab packaging cavity, and the bent portions of the first tab and the second tab are both accommodated in the tab packaging cavity.

[0015] According to some embodiments of the present application, one edge of the tab packaging portion along the second direction is flush with an edge of the battery cell accommodating portion.

[0016] According to some embodiments of the present application, a dimension of the tab packaging portion along the first direction is 0.3 mm to 5.0 mm.

[0017] According to some embodiments of the present application, a distance from an edge of the battery cell along the first direction facing the tab packaging portion to an edge of the tab packaging portion away from the battery cell accommodating portion is 0.5 mm to 5.5 mm.

[0018] According to the electronic device of the second embodiment of the present application, the electronic device includes the single cell battery described in the first embodiment of the present application.

[0019] The electronic device according to the embodiments of the present application has at least the following beneficial effects: The single cell battery can be installed in an electronic device to power the electronic device. Because the single cell battery reduces the free space between the battery cell and the packaging in the area where the tabs are not provided, the overall volume of the single cell battery is reduced and the energy density is increased. When installed in an electronic device, the single cell battery occupies less space in the electronic device, thereby improving the flexibility and rationality of the layout of the components within the electronic device.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] FIG1 is a schematic diagram of the structure of a single battery according to an embodiment of the present application;

[0023] FIG2 is a schematic structural diagram of the single cell shown in FIG1 from another perspective;

[0024] FIG3 is a schematic diagram of the structure of a single cell according to another embodiment of the present application;

[0025] FIG4 is a partial enlarged view of point A shown in FIG3 ;

[0026] FIG5 is a schematic diagram of the structure of a single cell according to another embodiment of the present application.

[0027] Reference numerals: single cell 100;

[0028] Battery cell 110;

[0029] a first tab 120;

[0030] Second electrode tab 130;

[0031] bending portion 140;

[0032] Package 150 ; cell accommodating portion 151 ; tab packaging portion 152 ; first packaging portion 1521 ; second packaging portion 1522 ; accommodating cavity 1523 ; tab packaging cavity 1524 . DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present application. 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 are not to be construed as limiting the present application.

[0034] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0035] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0036] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0037] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 this 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 can be combined in any appropriate manner in any one or more embodiments or examples.

[0038] The battery cell 110 formed by winding or stacking electrode sheets may have multiple electrode sheets and tabs. In actual production, multiple electrode sheets and tabs belonging to the positive electrode will be connected and externally connected to a positive electrode tab, and multiple electrode sheets and tabs belonging to the negative electrode will be connected and externally connected to a negative electrode tab to form a basic battery structure.

[0039] To reduce the volume of the positive and negative tabs during packaging, the positive and negative tab packaging portions are typically folded, and the packaging space of the package 150 is set based on the folded volume to avoid wasting a large amount of packaging space and affecting the energy density of the battery. The package 150 can be an aluminum-plastic film or a metal shell.

[0040] Referring to Figures 1 to 5, it should be noted that Figures 1 to 5 are cross-sectional views. The single cell 100 of the first embodiment of the present application includes a battery cell 110, a first tab 120, a second tab 130, and a package 150. The first tab 120 is connected to the battery cell 110; the second tab 130 is connected to the battery cell 110, and the first tab 120 and the second tab 130 are located on the same side of the battery cell 110; the package 150 includes a battery cell accommodating portion 151 and a tab packaging portion 152. The tab packaging portion 152 is connected to the battery cell accommodating portion 151, and the tab packaging portion 152 is away from the battery cell 110 along a first direction. The cell accommodating portion 151 extends, and along the second direction, the tab encapsulating portion 152 is smaller than the cell accommodating portion 151. The first and second directions are perpendicular, and the perpendicularity described here means that there is a certain deviation angle within the allowable error range. The first and second tabs 120 and 130 are each provided with a bent portion 140. The bent portion 140 extends along the thickness direction of the cell 110. The cell 110 is accommodated in the cell accommodating portion 151, and each bent portion 140 is accommodated in the tab encapsulating portion 152. One of the first and second tabs 120 and 130 is a positive tab, and the other is a negative tab. It should be noted that the first direction may be the length of the cell 110, and the second direction may be the width of the cell 110.

[0041] In the single battery 100, the first pole tab 120 and the second pole tab 130 are respectively connected to the same side of the battery cell 110. When the single battery 100 is used in a device, the device can set an input terminal corresponding to the position of the first pole tab 120 and the second pole tab 130 of the battery cell 110 to electrically connect the first pole tab 120 and the second pole tab 130 to ensure power supply, thereby improving the rationality of the layout of various parts in the device and the convenience of installing the single battery 100.

[0042] Along the first direction, the first and second tabs 120 and 130 protrude from the battery cell 110. During the packaging process of the single battery cell 100, the packaging portion of the first and second tabs 120 and 130 needs to be folded to form a bend 140. Therefore, when the battery cell 110, the first and second tabs 120, 130 are packaged with the packaging member 150, the battery cell 110 is accommodated in the battery cell accommodating portion 151 of the packaging member 150, and each bend 140 is accommodated in the tab packaging portion 152 extending away from the battery cell accommodating portion 151 along the first direction. As a result, the battery cell accommodating portion 151 and the tab packaging portion 152 of the packaging member 150 can be designed according to the actual dimensions of the battery cell 110, the first and second tabs 120, 130, respectively. This improves the design of the packaging member 150 based on the space required by the bend 140, which results in wasted space in the single battery cell 100 after packaging due to the lack of a tab area. This method can not only improve the energy density of the single battery cell 100 after packaging, but also reduce the empty space between the battery cell 110 in the area without the tab and the packaging component 150, so that the overall structure of the single battery cell 110 after packaging is more compact, and the battery cell 110 is not easy to shake in the battery cell accommodating portion 151, and the single battery cell 100 is more stable.

[0043] It should be noted that the first and second tabs 120 and 130 can be bent along the thickness direction of the battery cell 110 to maximize the size of the single fold. This maximizes the use of the space along the thickness direction of the battery cell 110 and reduces the volume of the bent portion 140 formed after the fold, thereby reducing the overall packaging volume and, in turn, helping to increase the energy density of the packaged single battery cell 100. Furthermore, the dimension of the tab packaging portion 152 along the second direction is smaller than that of the battery cell accommodating portion 151. This not only reduces the volume of the packaged single battery cell 100, but also facilitates the positioning of the tabs and battery cell 110, thereby improving packaging accuracy and speed.

[0044] In addition, the battery cell accommodating portion has a battery cell accommodating cavity for accommodating the battery cell 110 , and the tab packaging portion has a tab packaging cavity for accommodating the first tab 120 and the second tab 130 .

[0045] The battery cell 110 of the above-mentioned single battery 100 can be formed by winding or by stacking. In the multi-electrode-tab structure battery cell 110, multiple electrode tabs belonging to the positive electrode are connected and externally connected to one of the first electrode tab 120 and the second electrode tab 130, and multiple electrode tabs belonging to the negative electrode are connected and externally connected to the other of the first electrode tab 120 and the second electrode tab 130.

[0046] When the single cell 100 is used in a device, the space occupied by the packaged single cell 100 within the device is reduced by reducing the free space between the battery cell 110 in the untethered tab region and the packaging 150, thereby improving space utilization within the device. The device may be a mobile phone, and the reduced space occupied by the single cell 100 can be used to house other components of the mobile phone, thereby improving internal space utilization and facilitating optimization of the mobile phone.

[0047] Referring to Figures 1 to 4 , in a single battery cell 100 according to an embodiment of the present application, the tab packaging portion 152 includes a first packaging portion 1521 and a second packaging portion 1522. The first tab 120 is accommodated in the first packaging portion 1521, and the second tab 130 is accommodated in the second packaging portion 1522. The first packaging portion 1521 and the second packaging portion 1522 are spaced apart along the second direction. When the single battery cell 100 is packaged, the battery cell 110 is accommodated in the cell accommodating portion 151 of the packaging member 150, and the first tab 120 and the second tab 130 are accommodated in the tab packaging portion 152. The first tab 120 is accommodated in the first packaging portion 1521, and the second tab 130 is accommodated in the second packaging portion 1522. The first packaging portion 1521 and the second packaging portion 1522 are spaced apart along the second direction, which facilitates positioning the first tab 120 and the second tab 130 for packaging and prevents interference between the first tab 120 and the second tab 130. This also facilitates the production and processing of the battery cell 100. For example, when welding the first and second tabs 120, 130 to the battery cell 110, the first and second packaging portions 1521, 1522 are spaced apart along the second direction, thereby preventing interference during welding and ensuring weld quality. Furthermore, the spacing between the first and second packaging portions 1521 and 1522 reduces the packaging space between them, thereby increasing the energy density of the packaged battery cell 100.

[0048] When used in a device, the battery cell 100 can reduce its volume, improve space utilization, and facilitate functional expansion. The device can be a mobile phone. Because the first packaging portion 1521 and the second packaging portion 1522 are spaced apart, the space between the packaged battery cell 100, the first packaging portion 1521, and the second packaging portion 1522 can be used to accommodate other mobile phone components, thereby improving internal space utilization.

[0049] 1 to 5 , in the single battery cell 100 according to the embodiment of the present application, along the second direction, the edges of the first packaging portion 1521 and the second packaging portion 1522 facing each other are respectively flush with the edges of the cell accommodating portion 151. During the packaging process of the single battery cell 100, the cell 110 is accommodated in the cell accommodating portion 151 of the packaging member 150, and the first pole tab 120 and the second pole tab 130 are accommodated in the pole tab packaging portion 152, wherein the first pole tab 120 is accommodated in the first packaging portion 1521, and the second pole tab 130 is accommodated in the second packaging portion 1522, and along the second direction, the edges of the first packaging portion 1521 and the second packaging portion 1522 facing each other are respectively flush with the edges of the cell accommodating portion 151, which is higher than that along the second direction. In the second direction, the edges of the first packaging part 1521 and the second packaging part 1522 facing each other are respectively arranged with a distance from the battery cell accommodating part 151. This method makes the structure of the packaged single battery 100 more regular. When it is used in a device, the space between the first packaging part 1521 and the second packaging part 1522 is relatively flat, which can be used to place other components in the device, thereby improving the rationality of the layout of the components in the device and also helping to improve the convenience of assembling the single battery 100 and the device.

[0050] It should be noted that the relatively regular outer contour of the above-mentioned single battery 100 can reduce the complexity of the equipment configuration to accommodate the single battery 100. In addition, when the package 150 is a metal shell, the shape of the stamping die is relatively simple when the first packaging portion 1521 and the second packaging portion 1522 are stamped out of the metal shell, which helps improve the efficiency of the die design.

[0051] In addition, the package 150 can be a metal shell, and the first packaging part 1521, the second packaging part 1522 and the battery cell accommodating part 151 are shell structures with accommodating cavities formed by stamping. The relative cavity walls of the first packaging part 1521 and the second packaging part 1522 are flush with the cavity walls of the battery cell accommodating part 151, which helps to simplify the stamping mold design process and improve the efficiency of the stamping step; the package 150 can be an aluminum-plastic film, and the relative cavity walls of the first packaging part 1521 and the second packaging part 1522 are flush with the cavity walls of the battery cell accommodating part 151, which helps to simplify the head structure used for top sealing during packaging and reduce production costs.

[0052] 1 to 5 , in the single cell battery 100 of the embodiment of the present application, an accommodating cavity 1523 is defined between any edge of the first electrode 120 along the second direction and the inner side wall opposite to the first packaging portion 1521, and the size of the accommodating cavity 1523 along the second direction is 2.0 mm to 15.0 mm; and / or, an accommodating cavity 1523 is defined between any edge of the second electrode 130 along the second direction and the inner side wall opposite to the second packaging portion 1522, and the size of the accommodating cavity 1523 along the second direction is 2.0 mm to 15.0 mm.

[0053] The above structure ensures that during the packaging process of the single battery 100, the battery cell 110 is accommodated in the battery cell accommodating portion 151 of the packaging member 150, the bent portion 140 of the first pole tab 120 is accommodated in the first packaging portion 1521, and the bent portion 140 of the second pole tab 130 is accommodated in the second packaging portion 1522. While ensuring sufficient accommodating space, the first pole tab 120 and the second pole tab 130 reduce the sizes of the first packaging portion 1521 and the second packaging portion 1522 to improve the energy density of the single battery 100 after packaging, wherein the size of the accommodating cavity 1523 along the first direction is 2.0 mm to 15.0 mm, that is, the distance represented by H1 in Figures 1 and 4.

[0054] In the first embodiment, when the single battery cell 100 is packaged, the battery cell 110 is housed in the battery cell housing 151 of the packaging member 150, the bent portion 140 of the first electrode tab 120 is housed in the first packaging portion 1521, and the bent portion 140 of the second electrode tab 130 is housed in the second packaging portion 1522. Projected along the thickness direction of the battery cell 110, a housing cavity 1523 is defined between any edge of the first electrode tab 120 along the second direction and the inner sidewall opposite the first packaging portion 1521. The dimension of the housing cavity 1523 along the second direction is 2.0 mm to 15.0 mm.

[0055] In the second embodiment, when the single battery cell 100 is packaged, the battery cell 110 is accommodated in the battery cell accommodating portion 151 of the packaging member 150, the bent portion 140 of the first electrode tab 120 is accommodated in the first packaging portion 1521, and the bent portion 140 of the second electrode tab 130 is accommodated in the second packaging portion 1522. An accommodating cavity 1523 is defined between any edge of the second electrode tab 130 along the second direction and the inner sidewall opposite the second packaging portion 1522. The dimension of the accommodating cavity 1523 along the second direction is 2.0 mm to 15.0 mm.

[0056] In the third embodiment, when the single battery cell 100 is packaged, the battery cell 110 is housed in the battery cell housing 151 of the packaging member 150, the bent portion 140 of the first electrode tab 120 is housed in the first packaging portion 1521, and the bent portion 140 of the second electrode tab 130 is housed in the second packaging portion 1522. An accommodating cavity 1523 is defined between any edge of the first electrode tab 120 along the second direction and the inner sidewall opposite the first packaging portion 1521. The accommodating cavity 1523 has a dimension of 2.0 mm to 15.0 mm along the second direction. The accommodating cavity 1523 also has a dimension of 2.0 mm to 15.0 mm along the second direction.

[0057] It should be noted that when a single cell 100 is formed by winding or lamination, multiple electrode tabs are stacked in the corresponding positive and negative tab connection portions. During packaging, these electrode tabs occupy packaging space within the packaging member 150. Taking the electrode tabs belonging to the positive tab portion as an example, multiple electrode tabs are stacked and connected along the thickness direction of the battery cell 110. One electrode tab is used as a reference, and the remaining electrode tabs protruding from the reference electrode tab along the second direction are accommodated in the aforementioned accommodating cavity 1523. This reduces the impact of overlapping and misaligned electrode tabs, thereby ensuring the quality of the single cell 100. Similarly, the electrode tabs belonging to the negative tab connection portion may also experience misalignment when stacked. The provision of the accommodating cavity 1523 can reduce the impact of this problem, ensuring the packaging of the single cell 100.

[0058] In addition, the size of the accommodating cavity 1523 along the second direction is 2.0 mm to 15.0 mm, which can ensure a smooth packaging process of the single battery 100 while reducing the waste of the overall packaging space of the packaging member 150 and improving the energy density of the single battery 100.

[0059] 1 to 5 , the single cell battery 100 of the embodiment of the present application, the battery cell 110 includes a battery cell body, a first pole ear portion and a second pole ear portion, the first pole ear portion and the second pole ear portion are connected to the battery cell body and both protrude from the battery cell body, the first pole ear portion is connected to the first pole ear 120, and the second pole ear portion is connected to the second pole ear 130; the first pole ear portion protrudes from the first pole ear 120 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523; and / or the second pole ear portion protrudes from the second pole ear 130 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523.

[0060] When the single battery cell 100 is packaged, during the packaging process of the single battery cell 100, the battery cell 110 is accommodated in the battery cell accommodating portion 151 of the packaging component 150, the connection between the first pole tab 120 and the first pole tab portion is accommodated in the first packaging portion 1521, and the connection between the second pole tab 130 and the second pole tab portion is accommodated in the second packaging portion 1522, so that the first pole tab portion protrudes from the first pole tab 120 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523, and / or the second pole tab portion protrudes from the second pole tab 130 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523, thereby ensuring the smooth packaging of the battery cell 110, the first pole tab 120 and the second pole tab 130, and improving the packaging quality.

[0061] In the first embodiment, the battery cell 110 includes a battery cell body, a first pole ear portion and a second pole ear portion. The first pole ear portion and the second pole ear portion are connected to the battery cell body and both protrude from the battery cell body. The first pole ear portion is connected to the first pole ear 120, and the second pole ear portion is connected to the second pole ear 130; the first pole ear portion protrudes from the first pole ear 120 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523 to ensure the packaging quality.

[0062] In the second embodiment, the battery cell 110 includes a battery cell body, a first pole ear portion and a second pole ear portion. The first pole ear portion and the second pole ear portion are connected to the battery cell body and both protrude from the battery cell body. The first pole ear portion is connected to the first pole ear 120, and the second pole ear portion is connected to the second pole ear 130; the second pole ear portion protrudes from the second pole ear 130 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523 to ensure the packaging quality.

[0063] In the third embodiment, the battery cell 110 includes a battery cell body, a first pole ear portion and a second pole ear portion, the first pole ear portion and the second pole ear portion are connected to the battery cell body and both protrude from the battery cell body, the first pole ear portion is connected to the first pole ear 120, and the second pole ear portion is connected to the second pole ear 130; the first pole ear portion protrudes from the first pole ear 120 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523, and the second pole ear portion protrudes from the second pole ear 130 along the second direction to form a protrusion, and the protrusion is accommodated in the accommodating cavity 1523 to ensure the packaging quality.

[0064] It should be noted that when the battery cell 110 is formed by winding or lamination, multiple electrode tabs are present. A portion of these tabs are stacked and connected to form a first tab portion, while another portion is stacked and connected to form a second tab portion. The first tab portion is connected to the first tab 120, and the second tab portion is connected to the second tab 130. Taking the electrode tabs belonging to the first tab portion as an example, multiple electrode tabs are stacked and connected along the thickness direction of the battery cell 110. One electrode tab is used as a reference, and the portions of the remaining electrode tabs that protrude from the reference electrode tab along the second direction are accommodated in the aforementioned accommodating cavity 1523. This reduces the impact of overlapping and misaligned electrode tabs, thereby ensuring the quality of the single battery cell 100. Similarly, the electrode tabs belonging to the second tab portion may also experience misalignment when stacked. The provision of the accommodating cavity 1523 can reduce the impact of this problem, ensuring the packaging of the single battery cell 100.

[0065] In addition, the size of the accommodating cavity 1523 along the first direction is 2.0 mm to 15.0 mm, which can ensure a smooth packaging process of the single battery 100 while reducing the waste of the overall packaging space of the packaging component 150 and improving the energy density of the single battery 100.

[0066] Referring to Figures 1 to 5 , in a single cell 100 according to an embodiment of the present application, the tab packaging portion 152 includes a tab packaging cavity 1524, within which the bent portions 140 of the first and second tabs 120 and 130 are both accommodated. When the single cell 100 is packaged, the battery cell 110 is accommodated in the cell accommodating portion 151 of the packaging member 150, while the first and second tabs 120 and 130 are accommodated in the tab packaging portion 152. The bent portions 140 of the first and second tabs 120 and 130 are both accommodated in the tab packaging cavity 1524. Compared to a configuration in which the first and second packaging portions 1521 and 1522 are spaced apart along the second direction, this structure facilitates the processing or production of the packaging member 150 and also provides a more regular structure for the packaged single cell 100. When used in a device, the single cell 100 with this structure can better coordinate with the assembly of the various components within the device, optimize the layout of the components within the device installation space, and improve space utilization and neatness.

[0067] It should be noted that, in the above embodiment, the tab packaging portion 152 may be an integrated structure, and a cavity may be formed inside thereof as the tab packaging cavity 1524 .

[0068] In addition, if the package 150 is a metal shell, the above structure facilitates the simplification of the metal shell stamping mold design and reduces the mold design and manufacturing costs; if the package 150 is an aluminum-plastic film, the above structure facilitates the simplification of the head structure used for top sealing during packaging and reduces the head design and manufacturing costs.

[0069] 1 to 5 , in the single cell 100 of the embodiment of the present application, one of the edges of the tab packaging portion 152 along the second direction is flush with the edge of the cell accommodating portion 151. When the single cell 100 is packaged, the cell 110 is accommodated in the cell accommodating portion 151 of the package 150, and the first tab 120 and the second tab 130 are accommodated in the tab packaging portion 152. The bent portions 140 of the first tab 120 and the second tab 130 are both accommodated within the tab packaging cavity 1524. At the same time, one of the edges of the tab packaging portion 152 along the second direction is flush with the edge of the cell accommodating portion 151. As a result, the package 150 has a relatively flat structure, which can simplify the processing steps of the package 150 or shorten the production time. Furthermore, after packaging, the single cell 100 has a relatively regular structure, making assembly more convenient and efficient when used in equipment.

[0070] 1 and 2 , in a single cell 100 according to an embodiment of the present application, the dimension of the tab packaging portion 152 along the first direction is 0.3 mm to 5.0 mm, which is the distance indicated by H2 in FIG1 . This dimension of the tab packaging portion 152 along the first direction is 0.3 mm to 5.0 mm, ensuring that the bent portion 140 of the first tab 120 and the second tab 130 can both be accommodated within the tab packaging portion 152. This facilitates the packaging process of the single cell 100 while reducing waste in the overall packaging space of the packaging member 150 and improving the energy density of the single cell 100.

[0071] Referring to Figures 1 to 3 , in a single battery cell 100 according to an embodiment of the present application, the distance between the edge of the battery cell 110 facing the tab packaging portion 152 along the first direction and the edge of the tab packaging portion 152 away from the cell accommodating portion 151 is 0.5 mm to 5.5 mm, i.e., the distance indicated by H3 in Figure 1 . During the packaging process of the single battery cell 100, the battery cell 110 is accommodated in the cell accommodating portion 151 of the packaging member 150, and the first and second tabs 120 and 130 are accommodated in the tab packaging portion 152. Projected along the thickness direction of the battery cell 110, the distance between the edge of the battery cell 110 facing the tab packaging portion 152 along the first direction and the edge of the tab packaging portion 152 away from the cell accommodating portion 151 is 0.5 mm to 5.5 mm. This ensures sufficient packaging space for each bend 140 while reducing waste in the overall packaging space of the packaging member 150 and improving the energy density of the single battery cell 100.

[0072] 1 to 5 , the electronic device of the second embodiment of the present application includes the single cell 100 of the first embodiment of the present application. The electronic device has a storage cavity for accommodating the single cell 100 and other components. In the single cell 100, the first pole tab 120 and the second pole tab 130 are respectively connected to the same side of the battery cell 110. When the single cell 100 is used in a device, the device can be provided with an input terminal corresponding to the position of the first pole tab 120 and the second pole tab 130 of the battery cell 110, so as to electrically connect the first pole tab 120 and the second pole tab 130 to ensure power supply, thereby improving the rationality of the layout of the various parts in the device and the convenience of installing the single cell 100. During the packaging process of the single battery cell 100, the battery cell 110 is accommodated in the battery cell accommodating portion 151 of the packaging member 150, and each bent portion 140 is accommodated in the tab packaging portion 152 extending in a first direction away from the battery cell accommodating portion 151. Consequently, the battery cell accommodating portion 151 and the tab packaging portion 152 of the packaging member 150 can be designed according to the actual dimensions of the battery cell 110, the first tab 120, and the second tab 130, respectively. This improves the design of the packaging member 150 based on the required space for the bent portion 140, which results in wasted space in the packaged single battery cell 100 due to the lack of tab areas. This approach not only improves the energy density of the packaged single battery cell 100, but also reduces the free space between the battery cell 110 without tab areas and the packaging member 150, making the overall structure of the packaged single battery cell 110 more compact. Furthermore, the battery cell 110 is less likely to shake in the battery cell accommodating portion 151, and the single battery cell 100 is more stable. Finally, when the battery cell 100 is housed in the housing cavity and used to power an electronic device, the battery cell reduces the free space between the battery cell 110 (where the tabs are not located) and the packaging, resulting in a smaller overall volume and higher energy density. When installed in an electronic device, the battery cell 100 occupies less space, helping to improve the flexibility and rationality of the component layout within the electronic device.

[0073] It should be noted that, since this embodiment adopts the single cell of the first embodiment, this embodiment has all the beneficial effects brought by the first embodiment, which will not be described in detail here.

[0074] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A single cell battery, characterized in that: include: battery cells; a first tab connected to the battery cell; a second electrode tab, the second electrode tab being connected to the battery cell, the first electrode tab and the second electrode tab being located on the same side of the battery cell; A package, the package comprising a cell accommodating portion and a tab packaging portion, the tab packaging portion being connected to the cell accommodating portion, the tab packaging portion extending away from the cell accommodating portion along a first direction, the tab packaging portion being smaller than the cell accommodating portion along a second direction, the first direction being perpendicular to the second direction; The first tab and the second tab are both provided with a bending portion, the bending portion extending along the thickness direction of the battery cell, the battery cell is accommodated in the battery cell accommodating portion, and each of the bending portions is accommodated in the tab packaging portion.

2. The single cell according to claim 1, characterized in that: The tab packaging portion includes a first packaging portion and a second packaging portion, the first tab is accommodated in the first packaging portion, and the second tab is accommodated in the second packaging portion; The first packaging portion and the second packaging portion are spaced apart along the second direction.

3. The single cell according to claim 2, characterized in that: Along the second direction, edges of the first packaging portion and the second packaging portion that are opposite to each other are respectively flush with edges of the battery cell accommodating portion.

4. The single cell according to claim 2, characterized in that: An accommodating cavity is defined between any edge of the first tab along the second direction and the inner side wall opposite to the first packaging portion, and a size of the accommodating cavity along the second direction is 2.0 mm to 15.0 mm; And / or, an accommodating cavity is defined between any edge of the second tab along the second direction and the inner side wall opposite to the second packaging portion, and a size of the accommodating cavity along the second direction is 2.0 mm to 15.0 mm.

5. The single cell according to claim 4, characterized in that: The battery cell includes a battery cell body, a first pole ear portion, and a second pole ear portion, wherein the first pole ear portion and the second pole ear portion are connected to the battery cell body and both protrude from the battery cell body, the first pole ear portion is connected to the first pole ear, and the second pole ear portion is connected to the second pole ear; The first electrode tab portion protrudes from the first electrode tab along the second direction to form a protruding portion, and the protruding portion is accommodated in the accommodating cavity; And / or, the second pole tab portion protrudes from the second pole tab along the second direction to form a protruding portion, and the protruding portion is accommodated in the accommodating cavity.

6. The single cell according to claim 1, characterized in that: The tab packaging portion has a tab packaging cavity, and the bent portions of the first tab and the second tab are both accommodated in the tab packaging cavity.

7. The single cell according to claim 1, characterized in that: One edge of the tab packaging portion along the second direction is flush with an edge of the battery cell accommodating portion.

8. The single cell according to claim 1, characterized in that: The dimension of the tab packaging portion along the first direction is 0.3 mm to 5.0 mm.

9. The single cell according to claim 1, characterized in that: A distance between an edge of the battery cell facing the tab packaging portion along the first direction and an edge of the tab packaging portion away from the battery cell accommodating portion is 0.5 mm to 5.5 mm.

10. An electronic device, characterized in that The invention comprises a housing and a plurality of single batteries according to any one of claims 1 to 9.

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