Tab structure, battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a tab structure, a battery and electric equipment. The tab structure comprises a tab body and a packaging and bonding component, the packaging and bonding part is connected to at least one surface in the tab body; the packaging bonding component is provided with an inclined plane. And in the height direction of the packaging and bonding component, the height value H1 of one end, close to the tab body, of the inclined surface is greater than the height value H2 of one end, far away from the tab body, of the inclined surface. According to the utility model, the exposed height of the tab body 1 can be reduced, so that the length of a battery cell after the tab body 1 is packaged can be effectively shortened, the energy density of the battery cell can be improved, and the attractive performance of the battery cell is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field, and particularly relates to an ear structure, a battery and an electrical equipment. Background Art

[0002] As a device with good safety performance, high mass energy density and flexible size design, the soft-pack battery has been widely used in the fields of mobile phones, laptops, electric vehicles, electric ships, electric tools, wearable devices, etc. Among them, the sealing area between the ear of the soft-pack battery and the aluminum-plastic film is the weakest position in the encapsulation of the soft-pack battery cell. The ear glue of the ear is fused with the hot-melt layer of the aluminum-plastic film by hot pressing. Among them, the sealing conditions, such as temperature, time and pressure, have a great influence on the sealing effect.

[0003] However, currently in the top-side sealing process, after the ear glue and the glue layer of the aluminum-plastic film are heated and melted, the ear glue overflows to both sides under the action of the head pressure (forming a concave horn shape). The overflow of the ear glue will cause the exposed height of the part of the ear glue far from the ear to increase, increasing the length of the battery cell and affecting the energy density of the battery cell. Summary of the Utility Model

[0004] The purpose of the utility model is to provide, in view of the deficiencies of the prior art, an ear structure that can solve the technical problem that the ear glue overflows in the prior art, resulting in an increase in the exposed height of the ear and affecting the energy density of the battery cell.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An ear structure includes an ear body and a packaging bonding component; the packaging bonding component is connected to at least one surface of the ear body; a slope is provided on the packaging bonding component; and in the height direction of the packaging bonding component, the height value H1 of the end of the slope close to the ear body is greater than the height value H2 of the end of the slope far from the ear body.

[0007] Preferably, the slope is linearly inclined in the direction from the ear body towards the edge of the bonding component far from the ear body.

[0008] Preferably, the linear inclination angle of the slope is α; the value range of α is: 5°≤α≤15°.

[0009] Preferably, the linear inclination angle of the slope is α; the value range of α is: 0°<α<5°.

[0010] Preferably, the height value H1 of the edge of the inclined surface near one end of the tab body and the height value H2 of the edge of the inclined surface far from the tab body satisfy: H1 - H2 = h; 0 < h ≤ 0.6 mm.

[0011] Preferably, the tab body includes an exposed connection section and a packaged connection section arranged in sequence, and the packaged bonding component is arranged on the packaged connection section; the packaged bonding component includes an assembly section and an exposed section arranged in sequence;

[0012] And the exposed section includes a main segment and side segments arranged at at least one side end of the main segment; the inclined surface is arranged on the side segment; the projection of the main segment towards the tab body covers the tab body.

[0013] Preferably, the inclined surface is inclined towards the assembly section.

[0014] Preferably, the packaged bonding component is hot melt adhesive or acrylate adhesive or fiber adhesive.

[0015] The present utility model also discloses a battery, including a packaging film and the tab structure described above; and the tab body includes a first tab and a second tab with opposite polarities; the number of the packaged bonding components is at least two, and they are respectively connected to the first tab and the second tab; the packaged bonding components are bonded to the top of the packaging film.

[0016] The present utility model also discloses an electrical equipment, including the battery.

[0017] The beneficial effect of the present utility model is that an inclined surface is added to the packaged bonding component in this technical solution, and the height dimension of the end far from the tab body is relatively small, which can realize that when the packaged bonding component, the tab body and other components are packaged together, the bonding component overflows as much as possible towards the direction of the inclined surface under the influence of packaging pressure, temperature, etc. Since there is more assembly stress between the bonding component and the tab body and less part overflows towards the tab body, the exposed height of the tab body can be reduced, and thus the length of the battery cell after the tab body is packaged can be effectively shortened, and the energy density of the battery cell can be improved, ensuring the aesthetic performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will describe the features, advantages and technical effects of the exemplary embodiments of the present utility model with reference to the attached Figures 1 to 4 to describe the features, advantages and technical effects of the exemplary embodiments of the present utility model.

[0019] Figure 1 is a schematic structural diagram of the tab structure according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the tab structure according to an embodiment of the present utility model;

[0021] Figure 3 The structural schematic diagram of the tab structure according to an embodiment of the present utility model;

[0022] Figure 4 The structural schematic diagram of a battery according to an embodiment of the present utility model.

[0023] In the figure: 1-tab body; 11-exposed connection section; 12-encapsulated connection section; 2-encapsulated bonding component; 21-inclined surface; 201-assembly section; 202-exposed section; 2021-main sub-section; 2022-side sub-section; 101-first tab; 102-second tab; 3-encapsulation film. Specific embodiments

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0026] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0027] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, or there are multiple situations where A exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0029] The following will be further described in detail with reference to the attached Figures 1 to 4 This utility model is further described in detail, but it is not a limitation to this utility model.

[0030] As Figure 1 shown, in an embodiment of the present utility model, the tab structure includes a tab body 1 and a packaging and bonding component 2; the packaging and bonding component 2 is connected to at least one surface inside the tab body 1; a slope 21 is provided on the packaging and bonding component 2; and in the height direction of the packaging and bonding component 2, the height value H1 of the end of the slope 21 close to the tab body 1 is greater than the height value H2 of the end of the slope 21 far from the tab body 1; that is, the height value of the position where the slope 21 is located gradually decreases from the tab body 1 to both sides. Among them, the height direction is the BA or AB direction.

[0031] The technical solution of the present utility model adds a slope on the packaging and bonding component, and the height dimension of the end far from the tab body 1 is relatively small, which can realize that when the packaging and bonding component 2, the tab body 1 and other components are packaged together, the bonding component 2 overflows as much as possible in the direction of the slope 21 under the influence of packaging pressure, temperature, etc. Since there is more assembly stress between the bonding component 2 and the tab body 1 and less part overflows in the direction of the tab body 1, the exposed height of the tab body 1 can be reduced, and then the length of the battery cell after the tab body 1 is packaged can be effectively shortened, and the energy density of the battery cell can be improved, and the aesthetic performance of the battery cell can be guaranteed.

[0032] Among them, in some embodiments, the packaging and bonding component 2 is hot melt adhesive, acrylate (acrylic) adhesive, fiber adhesive, etc.; among them, the hot melt adhesive is preferably EVA (ethylene-vinyl acetate copolymer) hot melt adhesive. This structure can ensure the bonding stability through EVA hot melt adhesive, and can reduce the deformation amount between the assembled components; thereby effectively controlling the overall size and improving the energy density of the battery cell.

[0033] Specifically, in some embodiments, as Figure 1 and 2As shown, the number of the inclined surfaces 21 is two, and they are oppositely arranged on both sides of the encapsulation bonding component 2; and the inclined surfaces 21 are straightly inclined in the direction from the tab body 1 towards the edge of the bonding component 2 (that is, the straight inclination is set such that the inclined surface is continuous and flat). Among them, the direction from the tab body 1 towards the edge of the bonding component 2 away from the tab body 1 is the BC direction. That is to say, the inclined surfaces 21 are arranged on the left and right sides of the tab body 1. When the bonding component 2 is affected by encapsulation pressure, temperature, etc., it can overflow from the inclined surfaces 21 on both sides, so as to reduce the exposed height of the tab body 1, and further effectively shorten the length of the battery cell after the tab body 1 is encapsulated, and can improve the energy density of the battery cell and ensure the aesthetic performance of the battery cell. In addition, the straightly inclined inclined surfaces 21 can improve the processing convenience, and can also realize the orderliness of overflow from the inclined surfaces 21 on both sides under the influence of encapsulation pressure, temperature, etc.

[0034] Specifically, in some embodiments, as Figure 1 and 2 shown, the straight inclination angle of the inclined surface 21 is α; the value range of α is: 5° ≤ α ≤ 15°. Among them, α can be 5°, 8°, 10°, 13°, 15°, etc. This structure can ensure that the encapsulation bonding component 2 has an exposed part of a certain size after encapsulation through a certain appropriate inclination angle, so as to effectively determine whether the tab body 1 is assembled with the encapsulation bonding component 2; ensure the effectiveness of encapsulation. When the inclination angle is too large, there may be no exposed part of the tab glue after the top sealing of the lowest position of the encapsulation bonding component 2 away from the tab body 1, or when the exposed part of the encapsulation bonding component 2 is too low, it will also cause the encapsulation to fail. Specifically, in some other embodiments, as Figure 1 and 2 shown, the straight inclination angle of the inclined surface 21 is α; the value range of α is: 0° < α < 5°. Among them, α can be 1°, 2°, 3°, 4°, etc. When the inclination of the inclined surface is too small, the overflow effect is not the best in this range, and there will still be some overflow as in the prior art, which will still increase the exposed height of the tab body 1, but the influence on the size and energy density of the battery cell is within an acceptable range.

[0035] Specifically, in some embodiments, as Figure 2 shown, the relationship between the edge height value H1 of the inclined surface 21 near the tab body 1 and the edge height value H2 of the inclined surface 21 far from the tab body 1 satisfies: H1 - H2 = h; and 0 < h ≤ 0.6 mm. That is to say, the inclined surface 21 with a certain height difference can effectively determine whether the tab body 1 is assembled with the encapsulation bonding component 2; ensure the effectiveness of encapsulation.

[0036] Specifically, in some embodiments, as Figure 1 and 2As shown, the tab body 1 includes an exposed connection section 11 and a packaged connection section 12 arranged in sequence, and the packaging adhesive component 2 is arranged on the packaged connection section 12. That is to say, through the inclined surface 21 arranged on the exposed connection section 11 facing outward, the guiding direction of the overflow of the packaging adhesive component 2 can be effectively guaranteed, and the size of the exposed part can be effectively guaranteed.

[0037] Specifically, in some embodiments, as Figure 2 and 3 shown, the packaging adhesive component 2 includes an assembly section 201 and an exposed section 202 arranged in sequence; the assembly section 201 is used to be arranged on the packaging film; the exposed section 202 is used to be exposed on the top of the packaging film; and the exposed section 202 includes a main segment 2021 and side segments 2022 arranged at at least one side end in the main segment 2021; the inclined surface 21 is arranged on the side segment 2022; the projection of the main segment 2021 facing the exposed connection section 11 covers the exposed connection section 11. Further, the inclined surface 21 is arranged facing the assembly section 201. That is to say, the projection of the highest point of the inclined surface 21 does not coincide with the exposed connection section 11, so that the exposed area of the exposed connection section 11 can be effectively controlled, and it can also be guaranteed that when the adhesive component 2 is affected by packaging pressure, temperature, etc., it can overflow from the inclined surfaces 21 on the left and right sides, so that the exposed height of the tab body 1 can be reduced, and then the length of the battery cell after the tab body 1 is packaged can be effectively shortened, and the energy density of the battery cell can be improved, and the aesthetic performance of the battery cell can be guaranteed.

[0038] The present invention also proposes a battery, which includes a tab structure. The specific structure of this battery refers to the above embodiments. Since this battery adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. As Figure 4 shown, wherein, the battery further includes a packaging film 3; the tab body 1 includes a first tab 101 and a second tab 102 with opposite polarities; the number of the packaging adhesive components 2 is at least two, and they are respectively connected to the first tab 101 and the second tab 102; the packaging adhesive component 2 is adhesively bonded to the top of the packaging film 3; one end of the first tab 101 extends into the interior of the packaging film 3; one end of the second tab 102 extends into the interior of the packaging film 3. Further, the packaging film 3 is an aluminum-plastic film. The first tab 101 is a positive tab, and the second tab 102 is a negative tab; or, the first tab 101 is a negative tab, and the second tab 102 is a positive tab.

[0039] The present invention also proposes an electrical device, which includes a battery. The specific structure of this battery refers to the above embodiments. Since this electrical device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0040] Among them, the electrical equipment may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, a planer, etc. The embodiments of the present application do not impose special restrictions on the above electrical equipment.

[0041] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] According to the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the above specific embodiments, and any obvious improvements, substitutions or variations made by those skilled in the art based on the present utility model all belong to the protection scope of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims

1. An ear structure, characterized in that: It includes a tab body and a packaging and bonding component; The packaging and bonding component is connected to at least one surface of the tab body; a slope is provided on the packaging and bonding component; and in the height direction of the packaging and bonding component, the height value H1 of the end of the slope close to the tab body is greater than the height value H2 of the end of the slope far from the tab body.

2. The tab structure according to claim 1, wherein: The slope is linearly inclined from the tab body towards the edge of the bonding component far from the tab body.

3. The tab structure according to claim 2, wherein: The linear inclination angle of the slope is α; the value range of α is: 5° ≤ α ≤ 15°.

4. The tab structure according to claim 2, wherein: The linear inclination angle of the slope is α; the value range of α is: 0° < α < 5°.

5. The tab structure according to claim 1, wherein: The edge height value H1 of the end of the slope close to the tab body and the edge height value H2 of the end of the slope far from the tab body satisfy: H1 - H2 = h; 0 < h ≤ 0.6 mm.

6. The tab structure according to claim 1 or 2, characterized in that: The tab body includes an exposed connection section and a packaging connection section arranged in sequence, and the packaging and bonding component is arranged on the packaging connection section; the packaging and bonding component includes an assembly section and an exposed section arranged in sequence; And the exposed section includes a main section and side sections arranged at at least one side end of the main section; the slope is arranged on the side section; the projection of the main section towards the tab body covers the tab body.

7. The tab structure according to claim 6, wherein: The slope is inclined towards the assembly section.

8. The tab structure according to claim 1, wherein: The packaging and bonding component is hot melt adhesive or acrylate adhesive or fiber adhesive.

9. A battery, characterized in that: It includes a packaging film and the tab structure according to any one of claims 1 to 8 above; and the tab body includes a first tab and a second tab with opposite polarities; the number of the packaging and bonding components is at least two and is respectively connected to the first tab and the second tab; the packaging and bonding component is bonded to the top of the packaging film.

10. An electrical device, characterized in that: It includes the battery according to claim 9.

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