Battery piece, battery assembly and printing screen of battery piece

Abstract

The embodiment of the utility model provides a battery piece, a battery assembly and a printing screen of the battery piece, the battery piece comprises a battery piece body and an electrode structure arranged on the battery piece body, a first lateral edge is arranged corresponding to a third lateral edge, a second lateral edge is arranged corresponding to a fourth lateral edge, and the electrode structure is arranged on the battery piece body. The battery piece chamfer and the chamfer electrode are correspondingly arranged; a plurality of current collection electrodes which are arranged at intervals in the first direction are arranged between the two third lateral edges, and a plurality of bus electrodes which are arranged at intervals in the second direction are arranged between the two fourth lateral edges; the extension line of the third lateral edge intersects with the chamfer of the battery piece, and the extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge; the distance between the second lateral edge and the bus electrode adjacent to the second lateral edge is a first numerical value, the minimum distance between the two adjacent bus electrodes is a second numerical value, and the first numerical value is larger than the second numerical value. Stress concentration can be effectively reduced while current collection is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a battery sheet, a battery assembly and a printing screen for the battery sheet. Background Art

[0002] In order to meet the high power and size requirements of photovoltaic modules, the size of the cell is also changing. At present, many cells have been transformed into rectangular cells. After the cells are rectangularized, the chamfers of the cells are made smaller and smaller, and the stress is more and more concentrated. In the prior art, the distance between the chamfered electrode and the chamfer of the cell is usually consistent with the distance between the four-side electrode and the edge of the cell, which makes it easier for hidden cracks or breakage to occur at the corners where the stress of the cell is concentrated. Utility Model Content

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a battery cell, a battery assembly and a printing screen for a battery cell that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, the embodiment of the utility model discloses a battery cell, comprising: a battery cell body and an electrode structure arranged on the battery cell body, wherein:

[0005] The battery cell body comprises two first lateral edges opposite to each other along a first direction, two second lateral edges opposite to each other along a second direction, and at least one battery cell chamfer, wherein the battery cell chamfer is connected between the adjacent second lateral edges and the first lateral edges; the electrode structure comprises two third lateral edges opposite to each other along the first direction, two fourth lateral edges opposite to each other along the second direction, and at least one chamfered electrode, wherein the chamfered electrode is connected between the adjacent fourth lateral edges and the third lateral edges;

[0006] The first lateral edge is arranged correspondingly to the third lateral edge, the second lateral edge is arranged correspondingly to the fourth lateral edge, and the battery cell chamfer and the chamfered electrode are arranged correspondingly;

[0007] A plurality of collector electrodes spaced apart along the first direction are disposed between the two third lateral edges, and a plurality of bus electrodes spaced apart along the second direction are disposed between the two fourth lateral edges;

[0008] An extension line of the third lateral edge intersects with the chamfer of the battery cell, and an extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge;

[0009] The spacing between the second lateral edge and the adjacent bus electrode is a first value, the minimum spacing between two adjacent bus electrodes is a second value, and the first value is greater than the second value.

[0010] Optionally, a collector electrode adjacent to the third lateral edge intersects with the chamfered electrode.

[0011] Optionally, the first value is less than twice the second value.

[0012] Optionally, the corresponding first lateral edge and the third lateral edge are opposite to each other, and the distance between the corresponding first lateral edge and the third lateral edge is a third value; the corresponding second lateral edge and the fourth lateral edge are opposite to each other, and the distance between the corresponding second lateral edge and the fourth lateral edge is a fourth value; the corresponding battery cell chamfer and the chamfered electrode are opposite to each other, and the distance between the corresponding battery cell chamfer and the chamfered electrode is a fifth value, and the fifth value is respectively greater than the third value and the fourth value.

[0013] Optionally, the difference between the fifth value and the third value is in the range of 0.1 mm to 1.0 mm, and the difference between the fifth value and the fourth value is in the range of 0.1 mm to 1.0 mm;

[0014] The third value and the fourth value have a value range of 0.3 mm to 1.2 mm;

[0015] The value range of the fifth value is greater than or equal to 0.5 mm.

[0016] Optionally, the difference between the fifth value and the third value ranges from 0.1 mm to 0.5 mm;

[0017] The difference between the fifth value and the fourth value ranges from 0.1 mm to 0.5 mm.

[0018] Optionally, the third value ranges from 0.3 mm to 1.2 mm;

[0019] The fourth value has a value range of 0.3 mm to 1.2 mm;

[0020] The fifth value ranges from 0.5 mm to 1.5 mm.

[0021] Optionally, the maximum value of the fifth value is greater than or equal to 2 mm;

[0022] The maximum value of the range of the difference between the fifth value and the third value is equal to 1.0 mm;

[0023] The maximum value of the range of the difference between the fifth value and the fourth value is equal to

[0024] 1.0mm.

[0025] Optionally, the chamfered electrode is in the shape of a line segment;

[0026] The shape of the chamfer of the battery cell includes: a line segment, a fold line, a curve or an arc.

[0027] In a second aspect, the utility model discloses a battery assembly, including: the above-mentioned battery cell.

[0028] The utility model embodiment includes the following advantages:

[0029] In the embodiment of the utility model, the first value is greater than the second value, so that the spacing between the second lateral edge of the battery cell body and the main grid adjacent thereto is greater than the spacing between at least one group of two adjacent main grids, which can reduce the stress concentration generated by the electrode structure on the battery cell body. Furthermore, the extension line of the third lateral edge intersects with the chamfer of the battery cell, and the extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge, so that only the extension line of one fine grid intersects with the chamfer of the battery cell, which can improve the problem of stress imbalance and stress concentration between the second lateral edge and the internal area caused by the difference between the first value and the second value, so that the battery cell can effectively reduce stress concentration while ensuring current collection, and reduce the phenomenon of hidden cracks or broken pieces in the battery cell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of a structure in which an electrode structure is arranged on a battery cell body according to the utility model;

[0031] Figure 2 This is a schematic diagram of a structure in which an electrode structure is arranged on the front side of a battery cell body of the utility model;

[0032] Figure 3 It is a structural schematic diagram of a battery cell body of the utility model in which an electrode structure is arranged on the back side.

[0033] Description of reference numerals:

[0034] 1-cell body, 11-first lateral edge, 12-cell chamfer, 13-second lateral edge, 2-electrode structure, 21-third lateral edge, 22-chamfered electrode, 23-fourth lateral edge, 24-collecting electrode, 25-bus electrode. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] One of the core concepts of the embodiments of the present utility model is to disclose a battery cell, such as Figure 1As shown, it may include: a battery cell body 1 and an electrode structure 2 arranged on the battery cell body 1, wherein the battery cell body 1 includes two first lateral edges 11 opposite to each other along a first direction, two second lateral edges 13 opposite to each other along a second direction, and a battery cell chamfer 12, and the battery cell chamfer 12 is connected between the adjacent second lateral edges 13 and the first lateral edges 11; the electrode structure 2 includes two third lateral edges 21 opposite to each other along the first direction, two fourth lateral edges 23 opposite to each other along the second direction, and a chamfered electrode 22, and the chamfered electrode 22 is connected between the adjacent fourth lateral edges 23 and the third lateral edges 21; the first lateral edge 11 is arranged correspondingly to the third lateral edge 21, and the second lateral edge 13 is arranged corresponding to the fourth lateral edge 23, and the cell chamfer 12 and the chamfer electrode 22 are arranged correspondingly; a plurality of collector electrodes 24 arranged at intervals along the first direction are arranged between the two third lateral edges 21, and a plurality of bus electrodes 25 arranged at intervals along the second direction are arranged between the two fourth lateral edges 23; the extension line of the third lateral edge 21 intersects with the cell chamfer 12, and the extension line of the collector electrode 24 adjacent to the third lateral edge 21 intersects with the second lateral edge 13; the spacing between the second lateral edge 13 and the bus electrode 25 adjacent thereto is a first value L1, and the minimum spacing between two adjacent bus electrodes 25 is a second value L2, and the first value L1 is greater than the second value L2.

[0040] In the embodiment of the utility model, the first value L1 is greater than the second value L2, so that the spacing between the second lateral edge 13 of the cell body 1 and the main grid adjacent thereto is greater than the spacing between two adjacent main grids, which can reduce the stress concentration caused by the electrode structure 2 on the cell body 1. Further, the extension line of the third lateral edge 21 intersects with the cell chamfer 12, and the extension line of the collector electrode 24 adjacent to the third lateral edge 21 intersects with the second lateral edge 13, so that only the extension line of one fine grid intersects with the cell chamfer 12, which can improve the stress imbalance and stress concentration problems between the second lateral edge 13 and the internal area caused by the difference between the first value and the second value, so that the cell can effectively reduce stress concentration while ensuring current collection, and reduce the phenomenon of hidden cracks or broken pieces in the cell body 1.

[0041] Specifically, the battery cell described in the embodiment of the utility model is a solar cell, which can convert solar energy into electrical energy. The battery cell includes a battery cell body 1 and an electrode structure 2 arranged on the battery cell body 1. The battery cell body 1 is the main structure of the battery cell, and the electrode structure 2 is an important component of the battery cell. The electrode structure 2 is responsible for guiding the photocurrent in the battery body to the outside of the battery.

[0042] Optionally, the battery cell body 1 may include a first surface and a second surface opposite to each other; both the first surface and the second surface of the battery cell body 1 are provided with an electrode structure 2, which can effectively ensure that the electrode structure 2 collects current.

[0043] Specifically, the battery cell body 1 may have a length direction, a width direction and a thickness direction. The battery cell body 1 may include a first surface and a second surface relative to each other along its thickness direction. The first surface may be the front side of the battery cell body 1 , and the second surface may be the back side of the battery cell body 1 .

[0044] Specifically, the first direction is the length direction of the battery cell body 1, the second direction is the width direction of the battery cell body 1, and the third direction is the thickness direction of the battery cell body 1. The first direction, the second direction, and the third direction intersect each other; when the first direction, the second direction, and the third direction are perpendicular to each other, the reliability of laying the battery cells can be improved.

[0045] In the embodiment of the utility model, the outer contour of the cell body 1 can be formed by the first lateral edge 11, the cell chamfer 12 and the second lateral edge 13. The outer contour of the electrode structure 2 can be formed by the third lateral edge 21, the chamfered electrode 22 and the fourth lateral edge 23.

[0046] Specifically, the outer contour of the electrode structure 2 may be similar to that of the cell body 1, that is, along the direction perpendicular to the first surface of the cell body 1, the orthographic projection of the electrode structure 2 is similar to that of the cell body 1. The electrode structure 2 is a closed figure.

[0047] Specifically, the electrode structure 2 can be formed on the surface of the cell body 1 by printing. The electrode structure 2 also includes a collector electrode 24 and a bus electrode 25. The collector electrode 24, the first lateral edge 11 and the second lateral edge 13 are all fine grids, and the bus electrode 25 is a main grid.

[0048] Specifically, the specific number of the collector electrodes 24 and the distance between two adjacent collector electrodes 24 can be arranged according to actual needs, and the embodiment of the utility model does not specifically limit this.

[0049] Specifically, the specific number of bus electrodes 25 and the distance between two adjacent bus electrodes 25 can be arranged according to actual needs, and the embodiment of the utility model does not specifically limit this.

[0050] Specifically, the three consecutive bus electrodes 25 may be a first bus electrode, a second bus electrode, and a third bus electrode, the spacing between the second bus electrode and the first bus electrode may be a first spacing, the spacing between the second bus electrode and the third bus electrode may be a second spacing, the first spacing and the second spacing may be the same or different. The minimum spacing between two adjacent bus electrodes 25 may be a second value.

[0051] Specifically, the chamfered electrode 22 can be an oblique fine grid, and the shape of the chamfered electrode 22 is a line segment, so as to improve the reliability of current collection of the electrode structure 2. The inclination angle of the chamfered electrode 22 can be set according to actual needs, and the embodiment of the utility model does not specifically limit this.

[0052] Optionally, the cell body 1 may include two first lateral edges 11 and two second lateral edges 13, and the electrode structure 2 may include two third lateral edges 21 and two fourth lateral edges 23; the cell body 1 and the electrode structure 2 may be in a quadrilateral shape, which may improve the production and maintenance of the cells, and facilitate the centralized laying of the cells, thereby improving the efficiency of absorbing solar energy.

[0053] Specifically, the battery cell body 1 and the electrode structure 2 may be a quadrilateral structure with at least one chamfer.

[0054] Specifically, the cell body 1 may include at least one cell chamfer 12, and the corresponding electrode structure 2 may also include at least one chamfered electrode 22. The cell chamfer 12 and the chamfered electrode 22 may be arranged correspondingly, and the correspondingly arranged cell chamfer 12 and chamfered electrode 22 may be arranged in parallel and at intervals.

[0055] Specifically, combined Figure 1 and Figure 2 The present invention only illustrates the chamfer of one of the battery cells in the battery cell body 1 .

[0056] Optionally, the first value L1 may be greater than the second value L2, and the first value L1 may be less than 2 times of the second value L2, which can further reduce the stress concentration caused by the electrode structure 2 on the battery cell body 1.

[0057] Optionally, the collector electrode 24 adjacent to the third lateral edge 21 intersects with the chamfered electrode 22 so that two fine grids can intersect with the chamfered electrode 22 at the same time, which can further improve the current collection capability of the cell and reduce stress concentration.

[0058] Specifically, Figure 2 , only one thin grid intersects with the chamfered electrode 22; Figure 3Two fine grids intersect with the chamfered electrode 22, and the extension line of one fine grid intersects with the chamfer 12 of the cell, so that the number of fine grids intersecting with the extension line and the chamfer 12 of the cell is less than the number of fine grids intersecting with the chamfered electrode 22, which is beneficial to improving the current collection capacity of the cell and reducing stress concentration.

[0059] Optionally, the shape of the battery cell chamfer 12 may include: a line segment, a fold line, a curve or an arc, which can improve the structural diversity of the battery cell.

[0060] Specifically, this embodiment only provides some examples of the shapes of the battery cell chamfers 12 . In other cases, the battery cell chamfers 12 may also be irregular shapes, which will not be described in detail in this embodiment of the utility model.

[0061] Optionally, the corresponding first lateral edge 11 and the third lateral edge 21 are opposite, and the spacing between the corresponding first lateral edge 11 and the third lateral edge 21 is a third value L3; the spacing between the corresponding second lateral edge 13 and the fourth lateral edge 23 is a fourth value L4; the corresponding battery cell chamfer 12 and the chamfered electrode 22 are opposite, and the spacing between the corresponding battery cell chamfer 12 and the chamfered electrode 22 is a fifth value L5, and the fifth value L5 is respectively greater than the third value L3 and the fourth value L4.

[0062] In the embodiment of the utility model, the fifth value L5 is greater than the third value L3 and the fourth value L4. In this way, the third value L3 and the fourth value L4 are designed to be smaller, which is convenient for the electrode structure 2 to collect current. The fifth value L5 is designed to be larger, which can effectively reduce the stress concentration of the battery cell body 1 at the corner position and reduce the phenomenon of hidden cracks or broken pieces in the battery cell body 1.

[0063] Specifically, the first lateral edge 11 and the third lateral edge 21 close to and parallel thereto are arranged correspondingly; the second lateral edge 13 and the fourth lateral edge 23 close to and parallel thereto are arranged correspondingly; the cell chamfer 12 and the chamfer electrode 22 close to and parallel thereto are arranged correspondingly.

[0064] Specifically, the third value L3 is a vertical distance from any point on the first lateral edge 11 to the corresponding third lateral edge 21, for example, Figure 2 and Figure 3 As shown, the first lateral edge 11 on the top side of the battery cell body 1 and the third lateral edge 21 on the top side of the electrode structure 2 are arranged correspondingly, and the distance between the corresponding first lateral edge 11 and the third lateral edge 21 is L3. The fourth value L4 is the vertical distance from any point on the second lateral edge 13 to the corresponding fourth lateral edge 23, for example, Figure 2 and Figure 3As shown, the second lateral edge 13 on the left side of the battery cell body 1 and the fourth lateral edge 23 on the left side of the electrode structure 2 are arranged correspondingly, and the distance between the corresponding second lateral edge 13 and the fourth lateral edge 23 is L4.

[0065] Specifically, the fifth value L5 is the vertical distance from any point on the chamfer 12 of the cell to the corresponding chamfer electrode 22. For example, as shown in FIG. Figure 2 and Figure 3 As shown, the fifth value is L5.

[0066] Optionally, the difference between the fifth value L5 and the third value L3 can range from 0.1mm to 1.0mm to ensure that the fifth value L5 is greater than the third value L3, thereby achieving the electrode structure 2 being able to effectively collect current while reducing stress concentration and avoiding hidden cracks or breakage in the battery cell body 1.

[0067] Optionally, the difference between the fifth value L5 and the fourth value L4 can range from 0.1mm to 1.0mm to ensure that the fifth value L5 is greater than the fourth value L4, thereby achieving the electrode structure 2 being able to effectively collect current while reducing stress concentration and avoiding hidden cracks or breakage in the battery cell body 1.

[0068] Optionally, the value range of the third value L3 is 0.3mm-1.2mm; the value range of the fifth value L5 is greater than or equal to 0.5mm, which can effectively ensure that the value range of the difference between the fifth value L5 and the third value L3 can be 0.1mm-1.0mm.

[0069] Optionally, the value range of the fourth value L4 is 0.3mm-1.2mm; the value range of the fifth value L5 is greater than or equal to 0.5mm, which can effectively ensure that the value range of the difference between the fifth value L5 and the fourth value L4 can be 0.1mm-1.0mm.

[0070] In some optional embodiments of the present invention, the difference between the fifth value L5 and the third value L3 may range from 0.1 mm to 0.5 mm, which may improve the rationality and reliability of setting the electrode structure 2 on the battery cell body 1.

[0071] Optionally, the difference between the fifth value L5 and the fourth value L4 may be in the range of 0.1 mm to 0.5 mm, which may improve the rationality and reliability of setting the electrode structure 2 on the battery cell body 1 .

[0072] Optionally, the value range of the third value L3 is 0.3mm-1.2mm, and the value range of the fifth value L5 is 0.5mm-1.5mm, so as to ensure that the value range of the difference between the fifth value L5 and the third value L3 can be 0.1mm-0.5mm.

[0073] Optionally, the fourth value L4 has a value range of 0.3 mm-1.2 mm, and the fifth value L5 has a value range of 0.5 mm-1.5 mm, so as to ensure that the difference between the fifth value L5 and the fourth value L4 can have a value range of 0.1 mm-0.5 mm.

[0074] For example, the third value L3 and the fourth value L4 can both be 0.75 mm, and the fifth value L5 can be 1.06 mm. The corresponding difference between the third value L3 and the fifth value L5 is 0.31 mm, and the corresponding difference between the fourth value L4 and the fifth value L5 is 0.31 mm.

[0075] The third value L3 and the fourth value L4 can both be 1.2 mm, the fifth value L5 can be 1.3 mm, the corresponding difference between the third value L3 and the fifth value L5 is 0.1 mm, and the corresponding difference between the fourth value L4 and the fifth value L5 is 0.1 mm.

[0076] The third value L3 and the fourth value L4 can both be 0.3 mm, the fifth value L5 can be 1.2 mm, the corresponding difference between the third value L3 and the fifth value L5 is 0.9 mm, and the corresponding difference between the fourth value L4 and the fifth value L5 is 0.9 mm.

[0077] The third value L3 is 0.9 mm, the fourth value L4 is 1.1 mm, and the fifth value L5 can be 1.2 mm. The corresponding difference between the third value L3 and the fifth value L5 is 0.3 mm, and the corresponding difference between the fourth value L4 and the fifth value L5 is 0.1 mm.

[0078] The third value L3 is 1.0 mm, the fourth value L4 is 0.8 mm, and the fifth value L5 can be 1.5 mm. The corresponding difference between the third value L3 and the fifth value L5 is 0.5 mm, and the corresponding difference between the fourth value L4 and the fifth value L5 is 0.7 mm.

[0079] In some other optional embodiments of the utility model, the maximum value of the fifth value L5 can be greater than or equal to 2mm; the maximum value of the value range of the difference between the fifth value L5 and the third value L3 can be equal to 1.0mm, and / or the maximum value of the value range of the difference between the fifth value L5 and the fourth value L4 can be equal to 1.0mm, so that the electrode structure 2 can adapt to more different shapes of battery cell bodies 1.

[0080] Specifically, for a battery cell in which the battery cell chamfer 12 and the chamfered electrode 22 are parallel, the difference between the fifth value L5 and the third value L3 can range from 0.1mm to 0.5mm, the difference between the fifth value L5 and the fourth value L4 can range from 0.1mm to 0.5mm, the third value L3 has a value range of 0.3mm to 1.2mm, the fourth value L4 has a value range of 0.3mm to 1.2mm, and the fifth value L5 has a value range of 0.5mm to 1.5mm.

[0081] For battery cells whose chamfer 12 is irregular or of other specific shapes, the maximum value of the difference between the fifth value L5 and the third value L3 may be greater than or equal to 2 mm; the maximum value of the difference between the fifth value L5 and the fourth value L4 may be greater than or equal to 2 mm; the maximum value of the range of values ​​of the difference between the fifth value L5 and the third value L3 may be equal to 1.0 mm, and the maximum value of the range of values ​​of the difference between the fifth value L5 and the fourth value L4 may be equal to 1.0 mm.

[0082] The battery cell described in the embodiment of the utility model has at least the following advantages:

[0083] In the embodiment of the utility model, the first value is greater than the second value, so that the spacing between the second lateral edge of the battery cell body and the main grid adjacent thereto is greater than the spacing between at least one group of two adjacent main grids, which can reduce the stress concentration generated by the electrode structure on the battery cell body. Furthermore, the extension line of the third lateral edge intersects with the chamfer of the battery cell, and the extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge, so that only the extension line of one fine grid intersects with the chamfer of the battery cell, which can improve the problem of stress imbalance and stress concentration between the second lateral edge and the internal area caused by the difference between the first value and the second value, so that the battery cell can effectively reduce stress concentration while ensuring current collection, and reduce the phenomenon of hidden cracks or broken pieces in the battery cell body.

[0084] In a second aspect, an embodiment of the utility model further discloses a battery assembly, which may include the above-mentioned battery cell.

[0085] Specifically, the battery assembly may include a front cover plate and a front packaging film stacked on the front side of the battery cell, and a rear cover plate and a rear packaging film stacked on the rear side of the battery cell.

[0086] The battery assembly described in the embodiment of the utility model has at least the following advantages:

[0087] In the embodiment of the utility model, the first value is greater than the second value, so that the spacing between the second lateral edge of the battery cell body and the main grid adjacent thereto is greater than the spacing between at least one group of two adjacent main grids, which can reduce the stress concentration generated by the electrode structure on the battery cell body. Furthermore, the extension line of the third lateral edge intersects with the chamfer of the battery cell, and the extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge, so that only the extension line of one fine grid intersects with the chamfer of the battery cell, which can improve the problem of stress imbalance and stress concentration between the second lateral edge and the internal area caused by the difference between the first value and the second value, so that the battery cell can effectively reduce stress concentration while ensuring current collection, and reduce the phenomenon of hidden cracks or broken pieces in the battery cell body.

[0088] In a third aspect, the embodiment of the utility model further discloses a printing screen for a battery cell, which can be used to print the electrode structure 2 of the above-mentioned battery cell.

[0089] Specifically, the printed screen of the battery cell may include a screen pattern corresponding to the electrode structure 2 .

[0090] Specifically, according to the above content, it can be known that, in the battery cell of the embodiment of the utility model, with the cooperation of the battery cell body 1 and the electrode structure 2, since the fifth value L5 is greater than the third value L3, and / or the fifth value L5 is greater than the fourth value L4, the stress at the corners of the battery cell body 1 is reduced, which can effectively reduce stress concentration and reduce the phenomenon of hidden cracks or breakage in the battery cell body 1.

[0091] Furthermore, when preparing the electrode structure 2 on the battery cell body 1, the printed screen of the battery cell is usually used to contact and squeeze the battery cell body 1. In this way, after the stress at the corners of the battery cell body 1 is reduced, the probability of hidden cracks or breakage of the battery cell body 1 can be reduced, and the probability of the printed screen being scrapped due to hidden cracks or breakage of the battery cell body 1 can also be reduced, and the deformation of the printed screen caused by the corners of the battery cell is reduced, thereby ensuring the graphic stability of the printed screen of the battery cell and extending the service life of the printed screen.

[0092] The printed screen for the battery cell described in the embodiment of the utility model has at least the following advantages:

[0093] In the embodiment of the utility model, the first value is greater than the second value, so that the spacing between the second lateral edge of the battery cell body and the main grid adjacent thereto is greater than the spacing between at least one group of two adjacent main grids, which can reduce the stress concentration generated by the electrode structure on the battery cell body. Furthermore, the extension line of the third lateral edge intersects with the chamfer of the battery cell, and the extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge, so that only the extension line of one fine grid intersects with the chamfer of the battery cell, which can improve the problem of stress imbalance and stress concentration between the second lateral edge and the internal area caused by the difference between the first value and the second value, so that the battery cell can effectively reduce stress concentration while ensuring current collection, and reduce the phenomenon of hidden cracks or broken pieces in the battery cell body.

[0094] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0095] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0096] The above is a detailed introduction to a battery cell, a battery assembly and a printed screen for a battery cell provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A battery cell, characterized in that: include: A battery cell body and an electrode structure arranged on the battery cell body, wherein: The battery cell body comprises two first lateral edges opposite to each other along a first direction, two second lateral edges opposite to each other along a second direction, and at least one battery cell chamfer, wherein the battery cell chamfer is connected between the adjacent second lateral edges and the first lateral edges; the electrode structure comprises two third lateral edges opposite to each other along the first direction, two fourth lateral edges opposite to each other along the second direction, and at least one chamfered electrode, wherein the chamfered electrode is connected between the adjacent fourth lateral edges and the third lateral edges; The first lateral edge is arranged correspondingly to the third lateral edge, the second lateral edge is arranged correspondingly to the fourth lateral edge, and the battery cell chamfer and the chamfered electrode are arranged correspondingly; A plurality of collector electrodes spaced apart along the first direction are disposed between the two third lateral edges, and a plurality of bus electrodes spaced apart along the second direction are disposed between the two fourth lateral edges; An extension line of the third lateral edge intersects with the chamfer of the battery cell, and an extension line of the collector electrode adjacent to the third lateral edge intersects with the second lateral edge; The spacing between the second lateral edge and the adjacent bus electrode is a first value, the minimum spacing between two adjacent bus electrodes is a second value, and the first value is greater than the second value.

2. The battery cell according to claim 1, characterized in that: A collector electrode adjacent to the third lateral edge intersects the chamfered electrode.

3. The battery cell according to claim 1, characterized in that: The first value is less than twice the second value.

4. The battery cell according to claim 1, characterized in that: The corresponding first lateral edge is opposite to the third lateral edge, and the corresponding spacing between the first lateral edge and the third lateral edge is a third value; the corresponding second lateral edge is opposite to the fourth lateral edge, and the corresponding spacing between the second lateral edge and the fourth lateral edge is a fourth value; the corresponding battery cell chamfer is opposite to the chamfered electrode, and the corresponding spacing between the battery cell chamfer and the chamfered electrode is a fifth value, and the fifth value is respectively greater than the third value and the fourth value.

5. The battery cell according to claim 4, characterized in that: The difference between the fifth value and the third value is in the range of 0.1 mm to 1.0 mm, and the difference between the fifth value and the fourth value is in the range of 0.1 mm to 1.0 mm; The third value and the fourth value have a value range of 0.3 mm to 1.2 mm; The value range of the fifth value is greater than or equal to 0.5 mm.

6. The battery cell according to claim 5, characterized in that: The difference between the fifth value and the third value is in the range of 0.1 mm to 0.5 mm; The difference between the fifth value and the fourth value ranges from 0.1 mm to 0.5 mm.

7. The battery cell according to claim 6, characterized in that: The third value has a value range of 0.3 mm to 1.2 mm; The fourth value has a value range of 0.3 mm to 1.2 mm; The fifth value ranges from 0.5 mm to 1.5 mm.

8. The battery cell according to claim 5, characterized in that: The maximum value of the fifth value is greater than or equal to 2 mm; The maximum value of the range of the difference between the fifth value and the third value is equal to 1.0 mm; The maximum value of the value range of the difference between the fifth value and the fourth value is equal to 1.0 mm.

9. The battery cell according to claim 1, characterized in that: The shape of the chamfered electrode is a line segment; The shape of the chamfer of the battery cell includes: a line segment, a fold line, a curve or an arc.

10. A battery assembly, characterized in that: include: A battery cell as claimed in any one of claims 1 to 9.

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