Tab, battery and electric equipment

Abstract

The utility model discloses a tab, battery and electric equipment, the tab comprises: a metal band, the metal band comprises an exposed area and a welding area, the exposed area and the welding area are distributed at an interval along the length direction of the metal band, the edge position of one side of the exposed area far away from the welding area is provided with a first positioning part, and the first positioning part is provided with a second positioning part; and at least one side of the metal belt in the width direction is provided with a second positioning part. According to the utility model, the first positioning part and the second positioning part are arranged in the exposed area of the metal belt, and the first positioning part and the second positioning part are matched with an external tool, so that the tab is accurately positioned, the problems of dislocation, inclination and the like of the tab during welding of the tab are avoided, the welding precision is improved, and the welding reject ratio is reduced. Meanwhile, the first positioning part is arranged in the exposed area, so that the exposed area and the welding area can be distinguished even if the sizes of the exposed area and the welding area are the same, identification and use errors of the welding area and the exposed area are prevented, and the risk of scrap caused by mistaken distinguishing of the two ends of the tab is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to a tab, a battery and an electrical device. Background Art

[0002] Most soft-pack batteries use positive and negative tabs to lead out the positive and negative tabs of the internal battery cells, and the two are connected by welding. The tabs are mainly composed of metal strips and tab glue attached to the surface of the metal strips.

[0003] At present, positive and negative tabs usually use regularly shaped tab metal strips. When the metal strips are welded to the pole pieces, precise positioning cannot be achieved and welding accuracy is difficult to guarantee. This places high demands on tooling and equipment, and can easily lead to problems such as misalignment, tilting, and excessive dimensional deviation after the tabs are welded, affecting subsequent processing. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a tab, a battery and an electrical device, which can at least solve the problem that accurate positioning cannot be achieved in the prior art.

[0005] The first aspect of the utility model provides a pole lug, comprising: a metal strip, wherein the metal strip comprises an exposed area and a welding area, wherein the exposed area and the welding area are spaced apart along the length direction of the metal strip, a first positioning portion is provided at an edge position of the exposed area away from a side of the welding area, and a second positioning portion is provided on at least one side in the width direction of the metal strip to position the pole lug.

[0006] Optionally, the first positioning portion forms a positioning groove having an opening.

[0007] Optionally, the second positioning portion forms a slot having an opening, and a radial dimension of the slot gradually decreases from the opening toward the slot bottom, and the second positioning portion is used for positioning.

[0008] Optionally, the first positioning portion is disposed at a center position of an edge of the exposed area away from the welding area.

[0009] Optionally, there is a preset distance between the first positioning portion and a center position of an edge of the exposed area on a side away from the welding area.

[0010] Optionally, the distance between the center of the first positioning portion and one side of the metal strip in the width direction is H1, where H1≥5mm, and the distance between the center of the second positioning portion and one side of the metal strip in the length direction is H2, where H2≥5mm.

[0011] Optionally, there are one or more first positioning portions, and one or more second positioning portions are respectively provided on both sides of the metal strip in the width direction.

[0012] Optionally, the second positioning portions on opposite sides of the exposed area in the width direction are symmetrically arranged.

[0013] Optionally, the second positioning portions on opposite sides of the exposed area in the width direction are staggered.

[0014] Optionally, the metal strip further includes a glue-attaching area, which is arranged between the exposed area and the welding area, and the tab further includes a glue layer, which is arranged in the glue-attaching area.

[0015] Optionally, two corners of the adhesive layer on a side close to the welding area are each provided with a bevel.

[0016] Optionally, the beveled angle of the adhesive layer is in the shape of a triangle, and two sides of the triangle are L1 and L2 respectively, wherein 1mm≤L1≤7mm, and 1mm≤L2≤7mm.

[0017] A second aspect of the present invention provides a battery, comprising the tabs described in the above embodiment.

[0018] A third aspect of the present invention provides an electrical device, comprising the battery described in the above embodiment.

[0019] The pole ear of the utility model is provided with a first positioning part and a second positioning part in the exposed area of ​​the metal strip, and the first positioning part and the second positioning part cooperate with the external tooling to realize the accurate positioning of the pole ear, and ensure that the pole ear will not have problems such as misalignment and tilting when the pole ear is welded, thereby improving the welding accuracy and reducing the welding defect rate. At the same time, by providing the first positioning part and the second positioning part in the exposed area, even if the size of the exposed area and the welding area is the same, the exposed area and the welding area can be distinguished, preventing the welding area and the exposed area from being identified and used incorrectly, and reducing the risk of the pole ear being scrapped due to incorrect distinction between the two ends.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] Figure 1 It is a structural schematic diagram of a pole ear according to an embodiment of the utility model;

[0023] Figure 2 is another structural schematic diagram of a pole ear according to an embodiment of the utility model;

[0024] Figure 3 is another structural schematic diagram of a pole ear according to an embodiment of the utility model;

[0025] Figure 4 is another structural schematic diagram of a pole ear according to an embodiment of the utility model;

[0026] Figure 5 is another structural schematic diagram of a pole ear according to an embodiment of the utility model;

[0027] Figure 6 It is another structural schematic diagram of a pole ear according to an embodiment of the utility model;

[0028] Reference numerals:

[0029] Metal strip 10; exposed area 11; welding area 12; adhesive area 13; first positioning portion 14; second positioning portion 15;

[0030] Adhesive layer 20; bevel 21. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] In the specification and claims of the utility model, if the term "first" or "second" is involved, it may explicitly or implicitly include one or more of the features. In the description of the 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 related objects 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, which are only for the convenience of describing the present invention 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, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" involved 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 an indirect connection 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 utility model can be understood according to specific circumstances.

[0039] The following is a detailed description of the tab according to the embodiment of the utility model in conjunction with the accompanying drawings.

[0040] like Figures 1 to 6 As shown, the pole ear according to the embodiment of the utility model includes a metal strip 10. Specifically, the metal strip 10 includes an exposed area 11 and a welding area 12. The exposed area 11 and the welding area 12 are spaced apart along the length direction of the metal strip 10. A first positioning portion 14 is provided at the edge position of the exposed area 11 away from the welding area 12. A second positioning portion 15 is provided on at least one side in the width direction of the metal strip 10 to position the pole ear.

[0041] In other words, see Figures 1 to 6 According to the embodiment of the utility model, the tab is mainly composed of a metal strip 10, wherein the metal strip 10 has an exposed area 11 and a welding area 12 (see Figure 1It should be noted that the exposed area 11 and the welding area 12 on the metal strip 10 can be understood as two areas on the metal strip 10 for realizing different functions. In actual products, the area on the metal strip 10 used for welding the pole ear and the pole piece is the welding area 12. Usually, the area of ​​the welding area 12 can be smaller than the area of ​​the exposed area 11. The utility model provides a first positioning portion 14 and a second positioning portion 15 on the exposed area 11, so that the staff can more intuitively distinguish the welding area 12 from the exposed area 11, prevent the welding area 12 and the exposed area 11 from being identified and used incorrectly, and reduce the risk of the pole ear being scrapped due to incorrect distinction between the two ends.

[0042] In the present invention, the four corners of the metal strip 10 are set to be smooth transitions, and the welding area 12 is mainly used for welding the pole ear and the pole piece. The exposed area 11 and the welding area 12 are spaced apart along the length direction of the metal strip 10. In the length direction of the metal strip 10, the length of the exposed area 11 can be greater than the length of the welding area 12. A first positioning portion 14 is provided at the edge of the exposed area 11 away from the welding area 12, and a second positioning portion 15 is provided on at least one side in the width direction of the metal strip 10. The first positioning portion 14 and the second positioning portion 15 can be positioned and coordinated with the external tooling to achieve precise positioning of the pole ear (positioning accuracy reaches the millimeter level), ensuring that when the pole ear is welded, the pole ear does not have problems such as misalignment and tilting, improving welding accuracy, and reducing welding defect rate. At the same time, by providing a first positioning portion 14 in the exposed area 11, even if the exposed area 11 and the welding area 12 are the same size, the exposed area 11 and the welding area 12 can be distinguished, thereby preventing the welding area 12 and the exposed area 11 from being identified and used incorrectly, and reducing the risk of the tab being scrapped due to incorrect distinction between the two ends.

[0043] Compared with the prior art, the pole ear of the utility model uses a metal strip 10 of regular shape, which is not easy to position when welded with the pole piece, and the welding accuracy is difficult to ensure. It has high requirements for tooling and equipment, which can easily lead to problems such as misalignment, tilting, and excessive dimensional deviation after the pole ear is welded, affecting subsequent processing. In addition, in the prior art, the metal strip 10 is of regular shape, and the exposed area 11 and the welding area 12 have the same appearance, no obvious difference, and are difficult to distinguish. During use, the exposed area 11 may be used as the welding area 12, resulting in incorrect use of the pole ear and causing it to be scrapped.

[0044] Therefore, the pole ear of the utility model is provided with a first positioning portion 14 and a second positioning portion 15 at the edge of one side away from the welding area 12 in the exposed area 11 of the metal strip 10. The first positioning portion 14 and the second positioning portion 15 cooperate with the external tooling to achieve accurate positioning of the pole ear, ensure that the pole ear does not have problems such as misalignment and tilting when the pole ear is welded, improve welding accuracy, and reduce welding defect rate. At the same time, by providing the first positioning portion 14 in the exposed area 11, even if the size of the exposed area 11 and the welding area 12 is the same, the exposed area 11 and the welding area 12 can be distinguished, preventing the welding area 12 and the exposed area 11 from being identified and used incorrectly, and reducing the risk of the pole ear being scrapped due to incorrect distinction between the two ends.

[0045] According to an embodiment of the present invention, the first positioning portion 14 is formed into a positioning groove having an opening. Figure 1 and Figure 2 As shown, the first positioning portion 14 can be configured as a positioning groove with an opening. For example, the first positioning portion 14 can be configured as a U-shaped hole or other types of positioning grooves.

[0046] According to an embodiment of the present invention, the second positioning portion 15 is formed into a slot having an opening, and the radial dimension of the slot gradually decreases from the opening toward the slot bottom for accurate positioning. Figure 1 and Figure 2 As shown, the second positioning portion 15 can be constructed into a trumpet-like shape, which is convenient for the positioning and matching of the second positioning portion 15 with the external tooling, and improves the simplicity of the positioning operation. By setting a U-shaped hole on the edge of the side of the exposed area 11 away from the welding area 12, and setting a groove with an opening on the two side edges of the exposed area 11 in the width direction, it is convenient for the metal strip 10 to be accurately positioned with the external tooling through the U-shaped hole and the groove, ensuring that the pole ear will not be misaligned, tilted, etc. when the pole ear is welded, improving the welding accuracy and reducing the welding defect rate. At the same time, by setting the first positioning portion 14 and the second positioning portion 15 in the exposed area 11, when the exposed area 11 and the welding area 12 are the same size, the exposed area 11 and the welding area 12 can also be distinguished, preventing the welding area 12 and the exposed area 11 from being identified and used incorrectly, and reducing the risk of the pole ear being scrapped due to incorrect distinction between the two ends.

[0047] According to an embodiment of the utility model, the aperture of the opening of the first positioning portion 14 is D1, wherein 1.5 mm ≤ D1 ≤ 20 mm, optionally, 5 mm ≤ D1 ≤ 10 mm, to ensure that the first positioning portion 14 can be positioned and matched with the external tooling.

[0048] According to one embodiment of the utility model, Figure 1 , Figure 3 and Figure 4As shown, the first positioning portion 14 can be arranged at the center of the edge of the exposed area 11 away from the welding area 12, which ensures the overall structural strength of the edge area and facilitates the positioning and matching of the first positioning portion 14 with the external tooling. Figure 2 , Figure 5 and Figure 6 As shown, the first positioning portion 14 can also be arranged at a position deviating from the center of the edge of the exposed area 11 away from the welding area 12 to ensure that the first positioning portion 14 can be positioned and matched with the external tooling.

[0049] According to one embodiment of the utility model, Figure 2 , Figure 5 and Figure 6 As shown, there is a preset distance between the first positioning portion 14 and the center position of the edge of the exposed area 11 away from the welding area 12, ensuring that the first positioning portion 14 is eccentrically arranged at the edge of the exposed area 11, which can not only ensure that the first positioning portion 14 can be positioned and coordinated with the external tooling, but also facilitate the operator to distinguish the front and back sides of the metal strip 10, prevent the front and back sides from being used incorrectly during the welding process of the metal strip 10, and reduce the risk of the tab being scrapped due to incorrect distinction.

[0050] According to one embodiment of the utility model, Figure 2 , Figure 5 and Figure 6 As shown, the distance between the center of the first positioning portion 14 and one side of the metal strip 10 in the width direction is H1, wherein H1≥5mm, which ensures that the exposed area 11 of the metal strip 10 is provided with the first positioning portion 14 while also ensuring the overall structural strength of the edge area.

[0051] According to one embodiment of the present invention, the number of the first positioning portion 14 is one (see Figures 1 to 4 ) or more (see Figure 5 and Figure 6 ), ensuring simple and accurate positioning of the metal strip 10 and the external tooling. One or more second positioning parts 15 are respectively provided on both sides of the metal strip 10 in the width direction. By providing the second positioning parts 15 on the side edges in the width direction of the exposed area 11, the second positioning parts 15 cooperate with the first positioning parts 14, which can facilitate the simple and accurate positioning of the metal strip 10 and the external tooling, further improve the positioning accuracy, ensure that when the tabs are welded, the tabs do not have problems such as misalignment and tilt, improve the welding accuracy, and reduce the welding defect rate. The number of the first positioning parts 14 and the second positioning parts 15 can be specifically limited according to actual needs, and will not be described in detail in the utility model.

[0052] According to one embodiment of the utility model, Figure 1 , Figure 2 and Figure 4As shown, the second positioning parts 15 on the opposite sides of the width direction of the exposed area 11 are symmetrically arranged. That is to say, the second positioning parts 15 with openings are respectively arranged on the opposite sides of the width direction of the exposed area 11, and the two second positioning parts 15 can be symmetrically arranged. By symmetrically arranging the two second positioning parts 15 on the side edges in the width direction of the exposed area 11, and by the second positioning parts 15 cooperating with the first positioning parts 14, it is more convenient to simply and accurately position the metal strip 10 and the external tooling, further improve the positioning accuracy, ensure that when the tab is welded, the tab does not have problems such as misalignment and tilt, improve the welding accuracy, and reduce the welding defect rate.

[0053] According to one embodiment of the utility model, Figure 3 As shown, the second positioning parts 15 on the opposite sides of the width direction of the exposed area 11 are staggered. In other words, the second positioning parts 15 with openings are respectively provided on the opposite sides of the width direction of the exposed area 11, and the two second positioning parts 15 can be staggered, which can ensure that the second positioning parts 15 can be positioned and matched with the external tooling, and at the same time, it can facilitate the operator to distinguish the front and back sides of the metal strip 10, prevent the front and back sides from being used incorrectly during the welding process of the metal strip 10, and reduce the risk of the tab being scrapped due to incorrect distinction. Of course, the number of second positioning parts 15 provided on the opposite sides of the width direction of the exposed area 11 can be specifically limited according to actual needs, and will not be described in detail in the present utility model.

[0054] According to an embodiment of the present invention, one or more second positioning portions 15 may be provided on both sides of the metal strip 10 in the width direction (see Figures 4 to 6 ), ensuring that the metal belt 10 and the external tooling are more firmly positioned. The number of the second positioning portions 15 can be specifically limited according to actual needs, and will not be described in detail in the present utility model.

[0055] According to an embodiment of the present invention, the aperture of the opening of the second positioning portion 15 is D2, and the radial dimension of the second positioning portion 15 gradually decreases from the opening toward the groove bottom. Among them, 1.5mm≤D2≤20mm, optionally, 1.5mm≤D2≤5mm, to ensure that the second positioning portion 15 can be positioned and matched with the external tooling.

[0056] According to one embodiment of the utility model, Figures 1 to 6 As shown, the distance between the center of the second positioning portion 15 and one side of the metal strip 10 in the length direction is H2, wherein H2≥5mm, optionally, H2≥7mm, so as to ensure that the exposed area 11 of the metal strip 10 is provided with the second positioning portion 15 while also ensuring the overall structural strength of the edge area.

[0057] According to an embodiment of the present invention, the metal strip 10 further includes a glue-attaching area 13 , which is disposed between the exposed area 11 and the welding area 12 , and the tab further includes a glue layer 20 , which is disposed in the glue-attaching area 13 .

[0058] In other words, Figures 1 to 6 As shown, the metal strip 10 further includes a glue area 13, which is arranged between the exposed area 11 and the welding area 12. The exposed area 11, the glue area 13 and the welding area 12 on the metal strip 10 are an integrated structure. The tab further includes a glue layer 20, which is arranged in the glue area 13. By providing the glue layer 20, it can be ensured that the tab can be insulated after the pole piece is connected.

[0059] According to an embodiment of the present invention, two corners of the adhesive layer 20 on one side close to the welding area 12 are each provided with a bevel 21 .

[0060] In other words, Figures 1 to 6 As shown, the two corners of the adhesive layer 20 close to the welding area 12 are each provided with a bevel 21. By providing a bevel 21 at each of the two corners of the adhesive layer 20 used in the tab close to the welding area 12, puncture leakage can be prevented by providing the bevel 21, and the exposed area 11 and the welding area 12 can be distinguished in cooperation with the first positioning portion 14.

[0061] In the present invention, the bevel 21 can be an obtuse angle structure, which has a poorer piercing ability than the right angle corners, and can improve the problem of the right angle corners of the glue layer 20 piercing the aluminum-plastic film PP layer during the packaging process, prevent leakage, and improve the battery side resistance yield and battery cell yield. At the same time, the structure of the bevel 21 corner of the glue layer 20 of the pole ear is easy to process, and the tool requirements are lower than the rounded corner structure, which can improve the processing efficiency and yield rate and reduce costs.

[0062] According to one embodiment of the utility model, Figures 1 to 6 As shown, the shape of the oblique angle 21 of the adhesive layer 20 is a triangle, and the two sides of the triangle are L1 and L2 respectively. In the present invention, the oblique angle 21 of the adhesive layer 20 can be the base of a right triangle, and the two right-angled sides of the right triangle are L1 and L2 respectively, wherein 1mm≤L1≤7mm, 1mm≤L2≤7mm, which effectively improves the problem of the right-angled corners of the adhesive layer 20 piercing the aluminum-plastic film PP layer during the packaging process in the prior art, prevents leakage, and improves the battery side resistance yield and the battery cell yield.

[0063] The pole ear of the present utility model is described below in conjunction with specific embodiments.

[0064] Example 1

[0065] See also Figure 2The positive pole ear includes a metal strip 10 made of aluminum and a pole ear glue (glue layer 20) symmetrically attached to both sides of the metal strip 10. The metal strip 10 of the positive pole ear is 45 mm long and 45.5 mm wide, and the pole ear glue is 11.5 mm wide and 51.6 mm long. The metal strip 10 includes three parts: an exposed area 11, a glue area 13 and a welding area 12, and the three parts are integrally formed. A "U-shaped hole" (first positioning part 14) is set at the top of the exposed area 11 of the metal conductor (metal strip 10), and its main body maximum dimension D1 = 6.5 mm, and the center distance from the edge of the metal strip 10 is H1 = 15 mm. "Horn hole" and "horn hole" (second positioning part 15) are set on both sides of the exposed area 11, and the main body maximum dimension of the "horn hole" is D2 = 6 mm, and the center distance from the edge of the metal strip 10 is H2 = 6 mm. The two corners of the tab glue close to the welding area 12 are each provided with an oblique angle 21, and the oblique angle 21 is an isosceles right triangle with a side length L1 = L2 = 2 mm.

[0066] Example 2

[0067] like Figure 4 As shown, the negative pole ear includes a metal strip 10 made of copper-nickel plating and a pole ear glue symmetrically attached to both sides of the metal strip 10. The metal strip 10 of the negative pole ear is 80 mm long and 39.5 mm wide, and the pole ear glue is 11.5 mm wide and 91 mm long. The metal strip 10 includes three parts: an exposed area 11, a glue area 13 and a welding area 12, and the three parts are integrally formed. A "U-shaped hole" is set at the top of the exposed area 11 of the metal conductor, and its main body maximum dimension D1 = 10 mm, and the center distance from the edge of the metal strip 10 is H1 = 40 mm. "Fan hole" and "Fan hole" are set on both sides of the exposed area 11, and the main body maximum dimension of the "Fan hole" is D2 = 6 mm, and the center distance from the edge of the metal strip 10 is H2 = 7 mm. The two corners of the pole ear glue close to the welding area 12 are each provided with an oblique angle 21, and the oblique angle 21 is an isosceles right triangle with a side length L1 = L2 = 4 mm.

[0068] Example 3

[0069] See also Figure 5The tab includes a metal strip 10 and tab glue symmetrically attached to both sides of the metal strip 10. The metal strip 10 of the tab is 30 mm long and 52 mm wide, and the tab glue is 12.5 mm wide and 51 mm long. The metal strip 10 includes an exposed area 11, a glue area 13 and a welding area 12. The three parts are integrally formed. Two "U-shaped holes" of the same size are symmetrically arranged on the top of the exposed area 11 of the metal conductor. The maximum size of the main body D1 = 6 mm, and the center distance from the edge of the metal strip 10 is H1 = 7 mm. "Horn hole" and "horn hole" are arranged on both sides of the exposed area 11. The maximum size of the main body of the "horn hole" is D2 = 6 mm, and the center distance from the edge of the metal strip 10 is H2 = 6 mm. The two corners of the tab glue close to the welding area 12 are each provided with an oblique angle 21, and the oblique angle 21 is an isosceles right triangle with a side length L1 = L2 = 2 mm.

[0070] Example 4

[0071] See also Figure 6 The tabs include a metal strip 10 and tab glue symmetrically attached to both sides of the metal strip 10. The metal strip 10 is 30 mm long and 52 mm wide, and the tab glue is 12.5 mm wide and 51 mm long. The metal strip 10 includes an exposed area 11, a glue area 13 and a welding area 12, and the three parts are integrally formed. Two "U-shaped holes" are symmetrically arranged on the top of the exposed area 11 of the metal conductor, and the maximum size of the main body D1 = 6 mm, and the center distance of the "U-shaped hole" from the edge of the metal strip 10 is H1 = 7 mm. Two "horn holes" of the same size are arranged on both sides of the exposed area 11, and the maximum size of the main body of the "horn hole" is D2 = 6 mm, and the center distance from the edge of the metal strip 10 is H2 = 6 mm. The center spacing of the two "horn holes" on the same side is 10 mm, and the two corners of the tab glue close to the welding area 12 are each provided with an oblique angle 21, and the oblique angle 21 is an isosceles right triangle with a side length of L1 = L2 = 2 mm.

[0072] In summary, the pole ear of the utility model is provided with a first positioning portion 14 and a second positioning portion 15 with an opening at the edge of the exposed area 11 of the metal strip 10. The first positioning portion 14 and the second positioning portion 15 cooperate with the external tooling to achieve accurate positioning of the pole ear, ensure that the pole ear does not have problems such as misalignment and tilting when the pole ear is welded, improve welding accuracy, and reduce welding defect rate. At the same time, by providing the first positioning portion 14 and the second positioning portion 15 in the exposed area 11, when the size of the exposed area 11 and the welding area 12 is the same, the exposed area 11 and the welding area 12 can also be distinguished, so as to prevent the welding area 12 and the exposed area 11 from being identified and used incorrectly, and reduce the risk of the pole ear being scrapped due to incorrect distinction between the two ends. At the same time, by setting a bevel 21 at each of the two corners of the glue layer 20 used in the tab near the welding area 12, and the bevel 21 can be an obtuse structure, the piercing ability is poorer than the right-angled corners, which can improve the problem of the right-angled corners of the glue layer 20 piercing the aluminum-plastic film PP layer during the packaging process, prevent leakage, and improve the battery side resistance yield and battery cell yield. At the same time, the structure of the beveled corners of the glue layer 20 of the tab is easy to process, and the tool requirements are lower than the rounded corner structure, which can improve the processing efficiency and yield rate, and reduce costs.

[0073] Of course, for those skilled in the art, other structures of the tabs and their working principles are understandable and achievable, and will not be described in detail in the present invention.

[0074] According to the second aspect of the utility model, a battery is provided, comprising the pole ear in the above embodiment. Since the pole ear according to the embodiment of the utility model has the above technical effect, the battery according to the embodiment of the utility model should also have the corresponding technical effect, that is, the utility model can achieve accurate positioning of the pole ear by adopting the pole ear, ensure that the pole ear does not have problems such as misalignment and tilt when welding the pole ear, improve welding accuracy, reduce welding defect rate, and prevent the welding area 12 and the exposed area 11 from being identified and used incorrectly, and reduce the risk of the pole ear being scrapped due to incorrect distinction between the two ends. In addition, it can improve the problem of the right-angled corners of the glue layer 20 piercing the aluminum-plastic film PP layer during the packaging process, prevent battery leakage, and improve the battery edge resistance yield and battery cell yield.

[0075] Of course, for those skilled in the art, other structures and working principles of the battery are understandable and achievable, and will not be described in detail in the present invention.

[0076] According to the third aspect of the utility model, an electrical device is provided, including the battery in the above embodiment. Since the battery according to the embodiment of the utility model has the above technical effects, the electrical device according to the embodiment of the utility model should also have the corresponding technical effects, that is, the utility model can ensure that when the pole ear is welded, there will be no problems such as misalignment and tilting of the pole ear, improve the welding accuracy, reduce the welding defect rate, and prevent the identification and use errors of the welding area 12 and the exposed area 11, and reduce the risk of the pole ear being scrapped due to the wrong distinction between the two ends. In addition, it can improve the problem of the right-angled corners of the glue layer 20 piercing the aluminum-plastic film PP layer during the packaging process, prevent battery leakage, and improve the battery edge resistance yield and battery cell yield.

[0077] Of course, for those skilled in the art, other structures and working principles of the electrical equipment are understandable and achievable, and will not be described in detail in the present utility model.

[0078] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A kind of ear, It is characterized in that include: A metal strip, comprising an exposed area and a welding area, wherein the exposed area and the welding area are spaced apart along the length direction of the metal strip, a first positioning portion is provided at an edge of the exposed area away from the welding area, and a second positioning portion is provided on at least one side in the width direction of the metal strip to position the pole lug.

2. The tab according to claim 1, It is characterized in that The first positioning portion forms a positioning groove having an opening.

3. The tab according to claim 1, It is characterized in that The second positioning portion forms a slot having an opening, and the radial dimension of the slot gradually decreases from the opening toward the slot bottom, and the second positioning portion is used for positioning.

4. The tab according to claim 1, It is characterized in that The first positioning portion is disposed at a central position of an edge of the exposed area away from the welding area.

5. The tab according to claim 1, It is characterized in that A preset distance exists between the first positioning portion and a center position of an edge of the exposed area away from the welding area.

6. The tab according to claim 1, It is characterized in that The distance between the center of the first positioning portion and one side of the metal strip in the width direction is H1, where H1≥5mm, and the distance between the center of the second positioning portion and one side of the metal strip in the length direction is H2, where H2≥5mm.

7. The tab according to claim 1, It is characterized in that The number of the first positioning portions is one or more, and one or more second positioning portions are respectively provided on both sides of the metal strip in the width direction.

8. The tab according to claim 7, It is characterized in that The second positioning portions on opposite sides of the exposed area in the width direction are symmetrically arranged.

9. The tab according to claim 7, It is characterized in that The second positioning portions on opposite sides of the exposed area in the width direction are staggered.

10. The tab according to claim 1, It is characterized in that The metal strip further includes a glue-attaching area, which is arranged between the exposed area and the welding area. The tab further includes a glue layer, which is arranged in the glue-attaching area.

11. The tab according to claim 10, It is characterized in that Two corners of the adhesive layer on one side close to the welding area are each provided with a bevel.

12. The tab according to claim 11, It is characterized in that The beveled angle of the adhesive layer is in the shape of a triangle, and the two sides of the triangle are L1 and L2 respectively, wherein 1mm≤L1≤7mm, and 1mm≤L2≤7mm.

13. A battery, It is characterized in that The invention comprises the electrode tab according to any one of claims 1 to 12.

14. An electrical device, It is characterized in that Comprising the battery of claim 13.

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