Integrated tab, soft package battery and electric equipment

Abstract

The utility model provides an integrated tab which comprises a positive tab, a negative tab and an adhesive tape, the adhesive tape is provided with a first surface and a second surface which are opposite in the thickness direction, and the positive tab and the negative tab are arranged on the adhesive tape in a spaced mode and located between the first surface and the second surface in the length direction of the adhesive tape. The two ends of the positive tab and the two ends of the negative tab exceed the two sides of the adhesive tape in the width direction, the thickness difference between the positive tab and the negative tab in the thickness direction is larger than 50 microns, and the thickness difference of the adhesive tape in the length direction of the adhesive tape is smaller than 10 microns. The adhesive tape is of an integrated structure and is consistent in thickness, the outer sides of the positive tab and the negative tab are both of adhesive layer structures, and in the top sealing process, the two faces of the adhesive tape make contact with the surface of the shell, so that the problem that the adhesive tape does not deform under the condition that the thickness difference exists between the positive tab and the negative tab can be effectively solved. The conditions that the top sealing position of the soft package battery is wrinkled, part of tab glue is excessively fused, and the other part of tab glue is not effectively fused are avoided, so that the sealing performance of the soft package battery is ensured to a certain extent.

Description

Technical Field

[0001] The present application relates to the field of soft-pack batteries, and more specifically, to an integrated tab, a soft-pack battery, and an electrical device. Background Art

[0002] The top sealing process of the existing soft-pack battery includes: firstly ultrasonically welding the positive electrode ear and the negative electrode ear to the core pack respectively; then affixing ear glue to the positive and negative sides of the top seal corresponding to the positive electrode ear, and affixing ear glue to the positive and negative sides of the top seal corresponding to the negative electrode ear; then placing the core pack into the punching hole of the aluminum-plastic film, wrapping the battery with the aluminum-plastic film, and then top sealing the top of the battery, and the ear glue and the aluminum-plastic film are sealed during the top sealing.

[0003] In soft-pack batteries, the positive and negative ears are made of different materials. In order to ensure the current capacity of the positive and negative ears, the thickness of the positive and negative ears is different. When completing the top sealing of the soft-pack battery according to the above-mentioned top sealing process, different heat sealing parameters such as temperature and pressure need to be used according to the different thickness of the heat sealing position of the soft-pack battery. Otherwise, the ear glue at some positions will not be effectively fused, while the ear glue at some positions will be over-melted, resulting in vertical stripes, wrinkles at the top sealing position, etc., affecting the sealing effect at the top sealing position. Utility Model Content

[0004] The purpose of the present application is to provide an integrated pole ear, a soft-pack battery, and an electrical device to improve the wrinkling problem of the soft-pack battery at the top seal position.

[0005] The embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides an integrated electrode ear, comprising a positive electrode ear, a negative electrode ear and a rubber strip, wherein the rubber strip has a first surface and a second surface opposite to each other in a thickness direction, and along the length direction of the rubber strip, the positive electrode ear and the negative electrode ear are spaced apart from each other on the rubber strip and located between the first surface and the second surface, both ends of the positive electrode ear and both ends of the negative electrode ear extend beyond both sides of the width direction of the rubber strip, and along the thickness direction, the thickness difference between the positive electrode ear and the negative electrode ear is greater than 50 μm, and along the length direction of the rubber strip, the thickness difference of the rubber strip is less than 10 μm.

[0007] The integrated pole ear provided by the above technical solution can be connected to the shell of the soft-pack battery by heating to complete the process of top-sealing the soft-pack battery. In the above technical solution, since the materials of the positive pole ear and the negative pole ear are different, in order to ensure the current capacity of the positive pole ear and the negative pole ear, the positive pole ear and the negative pole ear usually have a thickness difference; since the positive pole ear and the negative pole ear are both located between the first surface and the second surface and the thickness difference of the rubber strip is less than 10μm, in the process of top-sealing, by making the first surface and the second surface contact with the surface of the shell, it can effectively improve the situation that the soft-pack battery is wrinkled at the top-sealing position when there is a thickness difference between the positive pole ear and the negative pole ear, and part of the pole ear glue is over-melted while the other part of the pole ear glue is not effectively fused, thereby ensuring the sealing of the soft-pack battery to a certain extent. In addition, in the soft-pack battery with the integrated pole ear provided by the above technical solution, the thickness difference between the positive pole ear and the negative pole ear is large, and a good top-sealing can also be performed to simultaneously meet the pole ear design and top-sealing of the large soft-pack battery cell.

[0008] In some optional embodiments, the first surface is parallel to the second surface.

[0009] In the above technical solution, since the first surface is parallel to the second surface, the rubber strip can be in better contact with the shell, so as to improve the sealing performance of the soft-pack battery at the top sealing position.

[0010] In some optional embodiments, the thickness difference between the positive electrode tab and the negative electrode tab is 0.05-0.3 mm.

[0011] In some optional embodiments, the thickness of the positive electrode tab and the negative electrode tab are both in the range of 0.2 to 0.6 mm.

[0012] In some optional embodiments, the dimensions of the positive electrode tab and the negative electrode tab in the length direction of the rubber strip are both 60 to 600 mm; or / and, the length of the rubber strip is 150 to 1500 mm.

[0013] In the above technical solution, the positive electrode ear and the negative electrode ear are larger in size and the rubber strip is longer, so it can be applied to larger soft-pack batteries.

[0014] In some optional embodiments, the positive electrode tab is an aluminum sheet; and the negative electrode tab is a copper sheet or a nickel-plated copper sheet.

[0015] In some optional embodiments, the adhesive strip is coated on the outside of the positive electrode tab and the negative electrode tab by hot-melt connection, and is connected to the positive electrode tab and the negative electrode tab as a whole.

[0016] In the above technical solution, the rubber strip is wrapped around the outside of the positive electrode ear and the negative electrode ear by hot-melt connection, so as to facilitate the integrated connection between the positive electrode ear and the negative electrode ear.

[0017] In a second aspect, an embodiment of the present application provides a soft-pack battery, comprising a shell, a battery cell, and the integrated tab provided in the first aspect; the battery cell has a positive lead-out tab and a negative lead-out tab, the positive lead-out tab is welded to the positive tab, the negative lead-out tab is welded to the negative tab, and the shell is heat-sealed with the first surface and the second surface of the rubber strip.

[0018] In the above technical solution, the integrated pole ear provided in the first aspect is used to complete the sealing of the shell, and even if there is a thickness difference between the positive pole ear and the negative pole ear, a soft-pack battery with good sealing performance can be obtained.

[0019] In some optional embodiments, the soft-pack battery has a length of 100 to 1000 mm, a width of 150 to 1550 mm, and a thickness of 8 to 26 mm.

[0020] In a third aspect, an embodiment of the present application provides an electrical device, comprising the soft-pack battery provided in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a cross-sectional schematic diagram of the top seal position of the soft pack battery;

[0023] Figure 2 A schematic cross-sectional view of a soft-pack battery provided in an embodiment of the present application;

[0024] Figure 3 A schematic cross-sectional view of an integrated tab provided in an embodiment of the present application;

[0025] Figure 4 This is a front view of the integrated tab provided in an embodiment of the present application.

[0026] Icon: 100 - shell; 200 - integrated pole ear; 210 - positive pole ear; 220 - negative pole ear; 230 - adhesive strip; 231 - first surface; 232 - second surface; 300 - pole ear glue. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. 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 position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] See also Figure 1In the existing soft-pack battery, the tabs include a positive tab 210 and a negative tab 220. Generally, the positive tab 210 and the negative tab 220 are made of different materials. For example, the positive tab 210 is usually an aluminum structure, and the negative tab 220 is usually a copper structure, or a copper structure with a layer of nickel plated on the surface. However, in order to ensure the current capacity of the positive tab 210 and the negative tab 220, the thickness of the positive tab 210 and the negative tab 220 needs to be different. The tab is a sheet-like structure with a large surface. The thickness of the tab is the dimension of the tab perpendicular to the surface.

[0034] The inventors of the present application have found that in the existing top-sealing process, the thickness of the ear glue pasted on the ear is usually consistent, while the thickness of the positive ear and the negative ear are inconsistent. Therefore, if a single heating condition is used to heat the ear glue 300 so that the ear glue 300 connects the positive ear 210 and the negative ear 220 to the shell 100, the ear glue 300 in some areas may be over-melted due to uneven force and heating during the top-sealing process, while the ear glue 300 in some areas may not be effectively fused, and the edge of the shell 100 may be wrinkled and deformed after the top-sealing, etc. (i.e. Figure 1 The position where the shell 100 is deformed as shown in the figure has an adverse effect on the sealing effect at the top sealing position.

[0035] Based on this, the present application provides a soft pack battery, such as Figure 2 As shown, the soft pack battery includes a shell 100 and an integrated tab 200 connected to the shell 100. The shell 100 may be an aluminum-plastic film commonly used in the prior art, or a structural member made of other materials.

[0036] like Figure 3 and Figure 4 As shown, the present application also provides an integrated pole ear 200, which includes a positive pole ear 210, a negative pole ear 220 and a rubber strip 230. The positive pole ear 210 and the negative pole ear 220 are arranged along the length direction of the rubber strip 230, and there is a thickness difference of more than 50 μm between the positive pole ear 210 and the negative pole ear 220; wherein the rubber strip 230 is a structural member made of the material used for the pole ear glue 300 in the prior art. The larger surface of the positive pole ear 210 and the larger surface of the negative pole ear 220 are arranged parallel to each other; the thickness direction of the integrated pole ear 200 is consistent with the thickness direction of the positive pole ear 210 and the negative pole ear 220, and the thickness direction of the integrated pole ear 200 is also the thickness direction of the rubber strip 230.

[0037] The rubber strip 230 has a first surface 231 and a second surface 232 that are opposite to each other in the thickness direction. Both the first surface 231 and the second surface 232 are planes. Both the positive electrode ear 210 and the negative electrode ear 220 are located between the first surface 231 and the second surface 232. The thickness difference of the rubber strip 230 is less than 10 μm, that is, the distance between any two points in the first surface 231 and any point in the second surface 232 in the thickness direction of the rubber strip 230 is less than 10 μm; of course, the thickness difference of the rubber strip 230 is less than 10 μm, which can also be understood as the flatness of the first surface 231 and the second surface 232 of the rubber strip 230 is less than 10 μm, and can also be understood as the thickness tolerance of the rubber strip 230 is less than 10 μm. Among them, the thickness difference of the rubber strip 230 can be 9 μm, 8 μm, 7 μm, 6 μm, 5 μm, 4 μm, 3 μm, 2 μm, 1 μm. Preferably, the thickness difference of the adhesive strip 230 is 0, that is, the first surface 231 is parallel to the second surface 232 .

[0038] The shell 100 has a first edge and a second edge relative to each other. The first edge of the shell 100 is connected to the first surface 231, and the second edge of the shell 100 is connected to the second surface 232. That is, after the shell 100 is folded, the rubber strip 230 of the integrated pole tab 200 is sandwiched between the two opposite edges of the shell, and then the integrated pole tab 200 and the shell 100 are sealed by heating. Furthermore, the first surface 231 and the first edge, and the second surface 232 and the second edge are both hot-melt connected, that is, the shell 100 and the first surface 231 and the second surface 232 of the rubber strip 230 are heat-sealed. In the present application, the process of hot-melt connecting the rubber strip 230 and the shell 100 is the top sealing process of the soft-pack battery.

[0039] In the soft-pack battery provided in the present application, the first surface 231 and the second surface 232 of the integrated pole ear 200 are used to connect the shell 100, and the thickness difference of the rubber strip 230 is less than 10μm. The thickness of the rubber strip 230 is relatively uniform. Therefore, after the shell 100 and the rubber strip 230 are connected, the possibility of wrinkles at the connection position of the shell 100 and the rubber strip 230 is smaller.

[0040] In the existing top-sealing method, the positive electrode ear and the negative electrode ear are of split design, and the thickness of the positive electrode ear after being connected with the electrode ear glue is different from the thickness of the negative electrode ear after being connected with the electrode ear glue. Therefore, during the top-sealing process, it is easy for the electrode ear glue in some positions to fail to be effectively fused and the electrode ear glue in some positions to be over-melted, resulting in vertical stripes and wrinkles at the top-sealing position. The integrated pole ear 200 provided in the present application includes a rubber strip 230 made of the same material as the pole ear glue 300, and a positive pole ear 210 and a negative pole ear 220. Before the top sealing of the soft-pack battery using the integrated pole ear 200 provided in the present application, the rubber strip 230 and the positive pole ear 210 and the negative pole ear 220 have been connected. During the top sealing process, it is only necessary to heat the rubber strip 230 to connect the rubber strip 230 with the shell 100. Since the thickness of the rubber strip 230 is uniform, during the heating process of the rubber strip 230, the rubber strip 230 and the shell 100 can be well in surface contact, and the heating conditions at different positions of the rubber strip 230 are consistent. Therefore, the situation in the prior art that some pole ear glue 300 is not effectively fused or some pole ear glue 300 is over-melted will not occur, thereby improving the sealing effect of the soft-pack battery.

[0041] Furthermore, the soft pack battery also includes a battery cell disposed inside the housing 100, the battery cell having a positive lead-out tab and a negative lead-out tab, the positive lead-out tab is electrically connected to the positive tab 210, and the negative lead-out tab is electrically connected to the negative tab 220. The electrical connection may be welding or other forms of connection.

[0042] Further, in some embodiments, the positive electrode tab 210 and the negative electrode tab 220 are spaced apart in the length direction of the rubber strip 230, that is, the positive electrode tab 210 and the negative electrode tab 220 are spaced apart from each other in the rubber strip 230. Figure 3 It is not difficult to see that the spacing area between the positive electrode tab 210 and the negative electrode tab 220 is filled with the rubber strip 230 . Since the rubber strip 230 is made of the same material as the tab glue 300 in the prior art and has insulating properties, the positive electrode tab 210 and the negative electrode tab 220 will not be connected through the rubber strip 230 .

[0043] Further, in some embodiments, the rubber strip 230 is coated on the outside of the positive electrode ear 210 and the negative electrode ear 220 by hot-melt connection, and is hot-melt connected to the positive electrode ear 210 and the negative electrode ear 220. For example, the integrated electrode ear 200 provided in the present application can be formed by a mold, that is, the positive electrode ear 210 and the negative electrode ear 220 are placed in a preset position in the mold, and then a uniform and thick electrode ear glue 300 is filled between the positive electrode ear 210 and the negative electrode ear 220; the mold is heated and cured, and then the integrated electrode ear 200 provided in the above embodiment can be obtained. Of course, according to the specific material of the rubber strip 230 provided in the present application, other connection methods can be used between the rubber strip 230 and the positive electrode ear 210 and the negative electrode ear 220.

[0044] The rubber strip 230 is wrapped around the outer sides of the positive electrode ear 210 and the negative electrode ear 220. Figure 3 and Figure 4 As shown, on the one hand, the positive electrode ear 210 and the negative electrode ear 220 are both located between the first surface 231 and the second surface 232; on the other hand, the positive electrode ear 210 and the negative electrode ear 220 are located between the two ends of the rubber strip 230 in the length direction. By using the rubber strip 230 to cover the outer sides of the positive electrode ear 210 and the negative electrode ear 220, it is possible to achieve that when the integrated electrode ear 200 provided in the present application contacts with the shell 100, the surface of the rubber strip 230 contacts with the shell 100, thereby achieving better sealing at the top sealing position after heating for top sealing.

[0045] Of course, in some other embodiments, the positive electrode ear 210 and the negative electrode ear 220 may be located only between the first surface 231 and the second surface 232 and not covered by the rubber strip 230; or the positive electrode ear 210 and the negative electrode ear 220 may be located between the first surface 231 and the second surface 232, but only one of the positive electrode ear 210 and the negative electrode ear 220 may be covered by the rubber strip 230.

[0046] Further, if Figure 4 As shown, the first surface 231 extends in a first direction (i.e., the direction indicated by arrow A in the figure) and a second direction (i.e., the direction indicated by arrow B in the figure), wherein the first direction is the length direction of the rubber strip 230, and the second direction is the height direction of the rubber strip 230 perpendicular to the first direction. The positive tab 210 and the negative tab 220 both extend from both sides of the rubber strip 230 in the width direction; the positive tab 210 and the negative tab 220 extend from one side of the rubber strip 230 in the second direction, so that the positive tab 210 and the negative tab 220 can be connected to the positive lead tab and the negative lead tab of the battery cell; the positive tab 210 and the negative tab 220 extend from the other side of the rubber strip 230 in the second direction, so that the positive tab 210 and the negative tab 220 can be connected to the wire.

[0047] Further, in some embodiments of the present application, the thickness difference between the positive electrode ear 210 and the negative electrode ear 220 is within the range of 0.05 to 0.3 mm. The thickness difference between the positive electrode ear 210 and the negative electrode ear 220 is within the range of 0.05 to 0.3 mm, and the thickness difference between the positive electrode ear 210 and the negative electrode ear 220 is small. In the case where the existing positive electrode ear 210 is an aluminum structural member, and the negative electrode ear 220 is a copper structural member or a copper structural member with a nickel layer on the surface, the thickness difference between the positive electrode ear 210 and the negative electrode ear 220 is within the range of 0.05 to 0.3 mm, which can make the current capacity of the positive electrode ear 210 and the negative electrode ear 220 close. For example, the positive electrode ear 210 is a nickel sheet, and the negative electrode ear 220 is a copper sheet or a nickel-plated copper sheet. It is not difficult to understand that, under the condition of the same cross-sectional area, the flow capacity of the copper structure is greater than that of the aluminum structure. In the embodiment where the positive electrode ear 210 is an aluminum structure and the negative electrode ear 220 is a copper structure or a copper structure with a nickel layer on the surface, the difference in thickness between the positive electrode ear 210 and the negative electrode ear 220 is 0.05-0.3 mm, which means that the thickness of the negative electrode ear 220 is greater than the thickness of the positive electrode ear 210 by 0.05-0.3 mm. The difference in thickness between the positive electrode ear 210 and the negative electrode ear 220 can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, or 0.06 mm, 0.07 mm, etc., which are greater than 50 μm.

[0048] Of course, the present application also includes an implementation method in which the thickness difference between the positive electrode ear 210 and the negative electrode ear 220 is outside the range of 0.05 to 0.3 mm. Since in the integrated electrode ear 200 provided in the present application, the first surface 231 and the second surface 232 of the rubber strip 230 contact the shell 100, and the positive electrode ear 210 and the negative electrode ear 220 are both located between the first surface 231 and the second surface 232, therefore, even if the thickness difference between the positive electrode ear 210 and the negative electrode ear 220 is outside the range of 0.05 to 0.3 mm, the wrinkling of the soft-pack battery at the top sealing position after top sealing can be improved.

[0049] Further, in some embodiments, the thickness of the positive electrode tab 210 and the negative electrode tab 220 are both within the range of 0.2 to 0.6 mm. It is not difficult to understand that in a corresponding embodiment, the smaller thickness of the positive electrode tab 210 and the negative electrode tab 220 is 0.2 mm. In another corresponding embodiment, the larger thickness of the positive electrode tab 210 and the negative electrode tab 220 is 0.6 mm.

[0050] Furthermore, the integrated pole tab 200 provided in the present application can be applied to a larger soft-pack battery, such as a soft-pack battery with a length of 100 to 1000 mm, a width of 150 to 1550 mm, and a thickness of 8 to 26 mm; accordingly, the dimensions of the positive pole tab 210 and the negative pole tab 220 in the integrated pole tab 200 in the length direction of the rubber strip 230 are both 60 to 600 mm. Among them, the dimensions of the positive pole tab 210 and the negative pole tab 220 in the length direction of the rubber strip 230 can be the same or different. The width of the soft-pack battery and the length of the rubber strip 230 are dimensions in the same direction.

[0051] In the above-mentioned embodiments, the size of the soft-pack battery is relatively large, especially in the length direction. If the split-type pole ear and the corresponding top sealing method in the prior art are used, when there is a thickness difference between the positive pole ear 210 and the negative pole ear 220, it is easy to wrinkle, part of the pole ear glue 300 is over-melted, and part of the pole ear glue 300 is not effectively fused. In the above-mentioned embodiments of the present application, the soft-pack battery adopts the integrated pole ear 200 provided in the present application. In the process of top sealing, wrinkles at the top sealing position, over-melting or ineffective fusion of the pole ear glue 300 can be effectively avoided, and the sealing of the soft-pack battery can be effectively ensured.

[0052] In the embodiment of the soft-pack battery provided in the present application, the length of the rubber strip 230 in the integrated tab 200 used is 150 to 1500 mm. Those skilled in the art can reasonably set the length of the rubber strip 230 according to the length of the soft-pack battery to achieve a better sealing effect. According to the actual use scenario requirements, in some embodiments, the length of the rubber strip 230 can also be greater than 1500 mm.

[0053] In the embodiment of the integrated tab 200 provided in the present application, the dimensions of the positive tab 210 and the negative tab 220 in the length direction of the rubber strip 230 reach 60 to 600 mm, or the length of the rubber strip 230 is 150 to 1500 mm, which can be used for larger soft-pack batteries. Of course, in larger soft-pack batteries, it is also possible to simultaneously meet the requirements that the dimensions of the positive tab 210 and the negative tab 220 in the length direction of the rubber strip 230 reach 60 to 600 mm, and the length of the rubber strip 230 is 150 to 1500 mm.

[0054] Furthermore, the present application also provides an electrical device, including the soft-pack battery provided in the above-mentioned embodiment of the present application, and the electrical device includes electronic products such as computers, transportation vehicles such as electric vehicles, and energy storage equipment in the field of power generation, etc.

[0055] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated tab, characterized in that: It includes a positive electrode ear, a negative electrode ear and a rubber strip, wherein the rubber strip has a first surface and a second surface opposite to each other in the thickness direction, and along the length direction of the rubber strip, the positive electrode ear and the negative electrode ear are spaced apart from each other on the rubber strip and located between the first surface and the second surface, both ends of the positive electrode ear and both ends of the negative electrode ear extend beyond both sides of the width direction of the rubber strip, along the thickness direction, the thickness difference between the positive electrode ear and the negative electrode ear is greater than 50 μm, and along the length direction of the rubber strip, the thickness difference of the rubber strip is less than 10 μm.

2. The integrated tab according to claim 1, characterized in that: The first surface is parallel to the second surface.

3. The integrated tab according to claim 1, characterized in that: The thickness difference between the positive electrode tab and the negative electrode tab is 0.05 to 0.3 mm.

4. The integrated tab according to claim 3, characterized in that: The thickness of the positive electrode tab and the negative electrode tab are both in the range of 0.2 to 0.6 mm.

5. The integrated tab according to claim 1, characterized in that: The dimensions of the positive electrode tab and the negative electrode tab in the length direction of the rubber strip are both 60 to 600 mm; Or / and, the length of the rubber strip is 150-1500 mm.

6. The integrated tab according to claim 1, characterized in that: The positive electrode ear is an aluminum sheet; the negative electrode ear is a copper sheet or a nickel-plated copper sheet.

7. The integrated tab according to any one of claims 1 to 6, characterized in that: The adhesive strip is coated on the outside of the positive electrode ear and the negative electrode ear by hot-melt connection, and is connected with the positive electrode ear and the negative electrode ear as a whole.

8. A soft pack battery, characterized in that: It comprises a shell, a battery cell and the integrated electrode tab as described in any one of claims 1 to 7; the battery cell has a positive lead-out electrode tab and a negative lead-out electrode tab, the positive lead-out electrode tab is welded to the positive electrode tab, the negative lead-out electrode tab is welded to the negative electrode tab, and the shell is heat-sealed with the first surface and the second surface of the rubber strip.

9. The soft pack battery according to claim 8, characterized in that: The soft-pack battery has a length of 100 to 1000 mm, a width of 150 to 1550 mm, and a thickness of 8 to 26 mm.

10. An electrical device, characterized in that: Including the soft pack battery according to claim 8 or 9.

Images