Tab glue, battery and electronic equipment

Abstract

The tab glue comprises a middle part, a first part and a second part, the middle part comprises a first end and a second end which are opposite to each other, the first part is connected with the first end, the second part is connected with the second end, and the first part and the second part are arranged along the length direction of the tab glue. The first part, the middle part and the second part are sequentially arranged, the middle part is used for bonding the tab, the width of the first part is gradually increased in the direction from the first part to the middle part, the maximum width of the first part is not greater than the width of the first end, and the maximum width of the second part is not greater than the width of the second end in the direction from the second part to the middle part. The width of the second part is gradually increased, and the maximum width of the second part is not larger than the width of the second end. The tab glue disclosed by the utility model can effectively improve the yield of batteries.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an ear tab glue, a battery and an electronic device. Background Art

[0002] In the related art, a battery includes a battery cell, an ear tab and an aluminum plastic film. The ear tab is connected to the battery cell, and the aluminum plastic film encapsulates the battery cell and the ear tab. Among them, before the aluminum plastic film is encapsulated, ear tab glue is first provided on the ear tab. Specifically, the ear tab glue is attached to the ear tab, and under hot pressing conditions, the aluminum plastic film and the ear tab glue are fused and sealed by heat.

[0003] Furthermore, when the aluminum plastic film and the ear tab glue are fused and sealed, the heat sealing tool will squeeze the ear tab glue. Specifically, the middle part of the ear tab glue will shrink when heated (the middle position of the ear tab glue is connected to the metal strip ear tab, so the middle position of the ear tab glue is heated faster), and the two ends of the ear tab glue will extend and become longer under the action of the hot pressing tool, which will cause the width of the two ends of the ear tab glue to be much larger than the width of the middle part of the ear tab glue. Since the width of the two ends of the ear tab glue is too large, the length of the ear tab glue exposed relative to the aluminum plastic film will be too large, resulting in a low yield of the battery. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an ear tab glue, which can effectively improve the yield of the battery.

[0005] The utility model also provides a battery.

[0006] The utility model also provides an electronic device.

[0007] The ear tab glue according to the first aspect embodiment of the utility model is used for bonding the ear tab. The ear tab glue includes: a middle part, a first part and a second part. The middle part includes opposite first and second ends. The first part is connected to the first end, and the second part is connected to the second end. Along the length direction of the ear tab glue, the first part, the middle part and the second part are arranged in sequence. The middle part is used for bonding the ear tab. Wherein, in the direction from the first part to the middle part, the width of the first part gradually increases, and the maximum width of the first part is not greater than the width of the first end. In the direction from the second part to the middle part, the width of the second part gradually increases, and the maximum width of the second part is not greater than the width of the second end.

[0008] The tab glue according to the embodiment of the present utility model has at least the following beneficial effects: The tab glue includes three parts, namely, a middle part, a first part, and a second part. The middle part is used to connect with the tab, that is, the middle part is connected to the tab. It can be imagined that when the battery is encapsulated, the middle part of the tab glue contacts the tab. Therefore, the middle part will shrink after being heated. However, the end of the first part far from the middle part and the end of the second part far from the middle part are far from the tab, so they are less affected by heat and will not shrink. Specifically, in the direction from the first part to the middle part, the width of the first part gradually increases, and in the direction from the second part to the middle part, the width of the second part gradually increases. In this way, even if the first part and the second part will extend under the action of a hot pressing tool, it can still effectively ensure that the widths of the first part and the second part do not exceed the width of the middle part, which can effectively prevent the length of the tab glue exposed relative to the aluminum-plastic film from being too large. Specifically, the tab glue can effectively improve the yield of the battery.

[0009] The battery according to the second aspect embodiment of the present utility model includes:

[0010] A housing having a storage cavity;

[0011] A battery cell disposed in the storage cavity;

[0012] A tab, one end of which is connected to the battery cell, and the other end of the tab protrudes relative to the housing;

[0013] The tab glue according to the first aspect embodiment, one side of the tab glue is connected to the housing, and the other side of the tab glue is connected to the tab.

[0014] The battery according to the embodiment of the present utility model has at least the following beneficial effects: The tab glue includes three parts, namely, a middle part, a first part, and a second part. The middle part is used to connect with the tab, that is, the middle part is connected to the tab. It can be imagined that when the battery is encapsulated, the middle part of the tab glue contacts the tab. Therefore, the middle part will shrink after being heated. However, the end of the first part far from the middle part and the end of the second part far from the middle part are far from the tab, so they are less affected by heat and will not shrink. Specifically, in the direction from the first part to the middle part, the width of the first part gradually increases, and in the direction from the second part to the middle part, the width of the second part gradually increases. In this way, even if the first part and the second part will extend under the action of a hot pressing tool, it can still effectively ensure that the widths of the first part and the second part do not exceed the width of the middle part, which can effectively prevent the length of the tab glue exposed relative to the aluminum-plastic film from being too large. Specifically, the tab glue can effectively improve the yield of the battery. Further, the yield of the battery with this tab glue is relatively high.

[0015] In some embodiments of the present utility model, the shape of the tab glue is oval.

[0016] For a battery according to some embodiments of the present utility model, the short radius of the tab glue is A, the long radius of the tab glue is B, and the width of the tab is C, where 2 mm ≤ A ≤ 6 mm, 2 mm ≤ B ≤ 6 mm, and 1 mm ≤ C ≤ 20 mm.

[0017] For a battery according to some embodiments of the present utility model, the short radius of the tab glue is A, the long radius of the tab glue is B, and the width of the tab is C, and (B - C / 2) / A > 1.

[0018] For a battery according to some embodiments of the present utility model, the tab glue includes a body portion, a first protruding portion, and a second protruding portion. The first protruding portion and the second protruding portion are respectively connected to two ends of the body portion. The body portion is connected to the housing. The first protruding portion protrudes outside the housing, and the second protruding portion is located in the storage cavity.

[0019] For a battery according to some embodiments of the present utility model, along the length direction of the battery, the size of the first protruding portion is D, where 0.2 mm < D < 2 mm.

[0020] For a battery according to some embodiments of the present utility model, along the length direction of the battery, the size of the second protruding portion is F, where 0.1 mm < F.

[0021] For a battery according to some embodiments of the present utility model, the thickness of the tab glue is G, where 0.03 mm ≤ G ≤ 0.5 mm.

[0022] For a battery according to some embodiments of the present utility model, there are two tab glues, and the two tab glues are respectively connected to two sides of the tab.

[0023] An electronic device according to an embodiment of the third aspect of the present utility model includes the battery according to any one of the embodiments of the second aspect.

[0024] The electronic device according to the embodiment of the present utility model has at least the following beneficial effects: The tab glue includes three parts, namely a middle part, a first part, and a second part. The middle part is used to connect to the tab, that is, the middle part is connected to the tab. It can be imagined that when the battery is encapsulated, the middle part of the tab glue contacts the tab. Therefore, the middle part will shrink after being heated. However, the end of the first part far from the middle part and the end of the second part far from the middle part are far from the tab, so they are less affected by heat and will not shrink. Specifically, in the direction from the first part to the middle part, the width of the first part gradually increases, and in the direction from the second part to the middle part, the width of the second part gradually increases. In this way, even if the first part and the second part will extend under the action of the hot pressing tool, it can still effectively ensure that the widths of the first part and the second part do not exceed the width of the middle part, which can effectively prevent the length of the tab glue exposed relative to the aluminum-plastic film from being too large. Specifically, the tab glue can effectively improve the yield rate of the battery. Further, the yield rate of the battery with this tab glue is relatively high. Still further, the safety of the electronic device with this battery is relatively high.

[0025] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following will further illustrate the present utility model in conjunction with the drawings and embodiments, where:

[0027] Figure 1 is a schematic diagram of the tab glue of some embodiments of the present utility model;

[0028] Figure 2 is a schematic diagram of the tab glue and the tab of some embodiments of the present utility model;

[0029] Figure 3 is a schematic diagram of the battery of the first embodiment of the present utility model;

[0030] Figure 4 is a schematic diagram of the battery of the second embodiment of the present utility model;

[0031] Figure 5 is a schematic diagram of the tab and the tab glue in the prior art;

[0032] Figure 6 is a schematic diagram of the battery in the prior art.

[0033] Reference Signs:

[0034] Tab glue 100, middle part 110, first end 111, second end 112, first part 120, second part 130, body part 140, first protruding part 150, second protruding part 160, battery 200, housing 300, storage cavity 310, battery cell 400, tab 500. Detailed implementation manners

[0035] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0037] In the description of the present utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0038] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0039] In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0040] In the related art, the battery 200 includes a battery cell 400, a tab 500, and an aluminum plastic film. The tab 500 is connected to the battery cell 400, and the aluminum plastic film encapsulates the battery cell 400 and the tab 500. Among them, before the aluminum plastic film is encapsulated, a tab adhesive 100 is first provided on the tab 500. Specifically, the tab adhesive 100 is attached to the tab 500, and under hot pressing conditions, the aluminum plastic film and the tab adhesive 100 are heat-fused and sealed.

[0041] Furthermore, when the aluminum plastic film and the tab adhesive 100 are heat-fused and sealed, the heat-sealing tool will squeeze the tab adhesive 100. Specifically, the middle part 110 of the tab adhesive 100 will shrink when heated (the middle position of the tab adhesive 100 is connected to the metal strip tab 500, so the middle position of the tab adhesive 100 is heated faster), and the two ends of the tab adhesive 100 will extend and become longer under the action of the hot pressing tool, which will cause the width of the two ends of the tab adhesive 100 to be much larger than the width of the middle position of the tab adhesive 100. Since the width of the two ends of the tab adhesive 100 is too large, it will cause the length of the tab adhesive 100 exposed relative to the aluminum plastic film to be too large, resulting in a low yield of the battery 200. For this reason, the present application proposes a tab adhesive 100.

[0042] Please refer to Figures 1 to 4, in some embodiments, the tab glue 100 is used to bond the tab 500. After the tab glue 100 bonds the tab 500, when the battery 200 is encapsulated, the tab glue 100 can contact the aluminum-plastic film, so that the tab glue 100 can play a sealing role, effectively preventing the electrolyte in the battery 200 from flowing out and the outside air from entering the inside of the battery 200. The tab glue 100 includes: a middle portion 110, a first portion 120, and a second portion 130. The middle portion 110 includes opposite first and second ends 111 and 112. The first portion 120 is connected to the first end 111, and the second portion 130 is connected to the second end 112. Along the length direction of the tab glue 100, the first portion 120, the middle portion 110, and the second portion 130 are arranged in sequence. That is, the middle portion 110 is located between the first portion 120 and the second portion 130. The middle portion 110 is used to bond the tab 500. Wherein, in the direction from the first portion 120 to the middle portion 110, the width of the first portion 120 gradually increases, and the maximum width of the first portion 120 is not greater than the width of the first end 111. In the direction from the second portion 130 to the middle portion 110, the width of the second portion 130 gradually increases, and the maximum width of the second portion 130 is not greater than the width of the second end 112. Specifically, the tab glue 100 includes three parts, namely the middle portion 110, the first portion 120, and the second portion 130. The middle portion 110 is used to connect to the tab 500. That is, the middle portion 110 is connected to the tab 500. It can be imagined that when the battery 200 is encapsulated, the middle portion 110 of the tab glue 100 contacts the tab 500. Therefore, the middle portion 110 will shrink after being heated, while the end of the first portion 120 far from the middle portion 110 and the end of the second portion 130 far from the middle portion 110 are far from the tab 500, so they are less affected by heat and will not shrink. Specifically, in the direction from the first portion 120 to the middle portion 110, the width of the first portion 120 gradually increases, and in the direction from the second portion 130 to the middle portion 110, the width of the second portion 130 gradually increases. In this way, even if the first portion 120 and the second portion 130 will extend under the action of the hot pressing tool, it can still effectively ensure that the widths of the first portion 120 and the second portion 130 do not exceed the width of the middle portion 110, which can effectively prevent the length of the tab glue 100 exposed relative to the aluminum-plastic film from being too large. Specifically, the tab glue 100 can effectively improve the yield rate of the battery 200.

[0043] In the prior art, the widths of the first part 120 and the second part 130 are both equal to the width of the middle part 110, and the shape of the tab glue 100 is rectangular. Therefore, when the tab glue 100 is used in the battery 200 and encapsulated with the aluminum-plastic film, the middle part 110 will shrink under the action of heat. Since the first part 120 and the second part 130 are far from the middle part 110, they cannot shrink under the action of heat. Instead, the first part 120 and the second part 130 will extend under the action of hot pressing. Therefore, this will cause the widths of the first part 120 and the second part 130 to exceed the width of the middle part 110. In the present application, in the direction from the first part 120 to the middle part 110, the width of the first part 120 gradually increases. Since the heat gradually decreases in the direction from the middle part 110 to the first part 120, the farther the first part 120 is from the middle part 110, the smaller its width. In this way, even if the first part 120 is compressed and extended, the width of the first part 120 will not exceed the width of the middle part 110, and the width of the first part 120 at a position closer to the middle part 110 is larger, and this part can shrink to a certain extent under the action of heat, which can effectively prevent the width of the first part 120 from exceeding the width of the middle part 110. Similarly, in the direction from the second part 130 to the middle part 110, the width of the second part 130 gradually increases. Since the heat gradually decreases in the direction from the middle part 110 to the second part 130, the farther the second part 130 is from the middle part 110, the smaller its width. In this way, even if the second part 130 is compressed and extended, the width of the second part 130 will not exceed the width of the middle part 110, and the width of the second part 130 at a position closer to the middle part 110 is larger, and this part can shrink to a certain extent under the action of heat, which can effectively prevent the width of the second part 130 from exceeding the width of the middle part 110. Specifically, reference can be made to Figures 3 to 6 , Figure 3 which is a schematic diagram of the tab glue 100 before heat sealing, Figure 4 which is a schematic diagram of the tab glue 100 after heat sealing, Figure 5 which shows the shape of the tab glue 100 in the prior art, Figure 6 and Figure 3 which shows the deformation diagram of the tab glue 100 after heat sealing in the prior art. Comparing Figure 4 , it can be seen that even if the first part 120 and the second part 130 of the tab glue 100 are deformed, they will not exceed the width of the middle part 110. Comparing Figure 4 and Figure 6 , it can be seen that after the tab glue 100 in the prior art is deformed, the widths at both ends are greater than the width in the middle.

[0044] Please refer to Figures 3 to 4, in some embodiments, the battery 200 includes: a housing 300, a battery cell 400, tab 500, and the tab adhesive 100 of the above embodiments. The housing 300 has a storage cavity 310, and the housing 300 can be an aluminum-plastic film. The aluminum-plastic film is divided into three layers. The inner layer is polyethylene or polypropylene, the middle layer is aluminum metal, and the outer layer is a nylon layer. The three layers are bonded by an adhesive, and the total thickness is 76μm, 91μm, 103μm, 113μm, etc., and the color is silver, black, etc. The battery cell 400 is disposed in the storage cavity 310, and the battery cell 400 can be formed by winding electrode sheets. The main body of the battery cell 400 is square or oval. The positive electrode sheet and the negative electrode sheet are separated by the separator layer by layer to prevent contact short circuit. The positive electrode sheet can be composed of aluminum foil, main material (lithium cobaltate, lithium manganate, lithium iron phosphate, etc.) and additives. The negative electrode sheet can be composed of copper foil, main material (carbon, silicon, etc.) and additives. The separator material can be composed of polyethylene or polyethylene and ceramic, and adhesive. One end of the tab 500 is connected to the battery cell 400, and the other end of the tab 500 protrudes relative to the housing 300. The tab 500 can play a role in conducting electricity. The material of the tab 500 can be a metal material, such as aluminum and nickel. The width of the tab 500 is 1mm to 20mm, and the thickness of the tab 500 is 0.05mm to 0.5mm. One side of the tab adhesive 100 is connected to the housing 300, and the other side of the tab adhesive 100 is connected to the tab 500. The material of the tab adhesive 100 can be polyethylene, polypropylene, modified polyethylene or modified polypropylene. The color of the tab adhesive 100 can be white, yellow or transparent. Specifically, one side of the middle part 110 of the tab adhesive 100 is connected to the tab 500, and the other side of the middle part 110 is connected to the housing 300. Both sides of the first part 120 are connected to the housing 300, and both sides of the second part 130 are connected to the housing 300. The tab adhesive 100 includes three parts, namely the middle part 110, the first part 120 and the second part 130. The middle part 110 is used to connect to the tab 500, that is, the middle part 110 is connected to the tab 500. It can be imagined that when the battery 200 is encapsulated, the middle part 110 of the tab adhesive 100 contacts the tab 500. Therefore, the middle part 110 will shrink after being heated, while the end of the first part 120 far from the middle part 110 and the end of the second part 130 far from the middle part 110 are far from the tab 500, so they are less affected by heat and will not shrink. Specifically, in the direction from the first part 120 to the middle part 110, the width of the first part 120 gradually increases, and in the direction from the second part 130 to the middle part 110, the width of the second part 130 gradually increases. Thus, even if the first part 120 and the second part 130 will extend under the action of the hot pressing tool, it can still effectively ensure that the widths of the first part 120 and the second part 130 do not exceed the width of the middle part 110, which can effectively prevent the length of the tab adhesive 100 exposed relative to the aluminum-plastic film from being too large. Specifically, the tab adhesive 100 can effectively improve the yield of the battery 200.Furthermore, the yield rate of the battery 200 with the tab glue 100 is relatively high.

[0045] Furthermore, in some embodiments, the shape of the tab glue 100 is oval. Specifically, when the shape of the tab glue 100 is oval, on the one hand, the oval tab glue 100 is used on the battery 200, which can effectively improve the yield rate of the battery 200. In addition, the tab glue 100 being in an oval shape is convenient for design and mold opening, that is, the size and model of the tab glue 100 can be conveniently mass-produced, which can improve the manufacturing efficiency and save processing costs.

[0046] Furthermore, in some embodiments, the short radius of the tab glue 100 is A, the long radius of the tab glue 100 is B, and the width of the tab 500 is C. 2mm ≤ A ≤ 6mm, 2mm ≤ B ≤ 6mm, 1mm ≤ C ≤ 20mm. The short radius A can be 2mm, 3mm, 4mm, 5mm or 6mm. When the short radius of the tab glue 100 is less than 2mm, due to the too short short radius of the tab glue 100, the sealing effect may be poor during thermocompression packaging. When the short radius of the tab glue 100 is greater than 6mm, due to the too long short radius of the tab glue 100, material waste will occur. The long radius B can be 2mm, 3mm, 4mm, 5mm or 6mm. When the long radius of the tab glue 100 is less than 2mm, due to the too short long radius of the tab glue 100, the sealing effect may be poor during thermocompression packaging. When the long radius of the tab glue 100 is greater than 6mm, due to the too long long radius of the tab glue 100, material waste will occur. The width C of the tab 500 can be 1mm, 5mm, 10mm, 15mm or 20mm. When the width of the tab 500 is less than 1mm, due to the too short width of the tab 500, the current density will be too high, resulting in a relatively high temperature of the battery 200. When the width of the tab 500 is greater than 20mm, due to the too large width of the tab 500, material waste will occur.

[0047] Furthermore, please refer to Figures 1 to 4 , in some embodiments, the short radius of the tab glue 100 is A, the long radius of the tab glue 100 is B, and the width of the tab 500 is C, (B - C / 2) / A > 1. Specifically, when the tab glue 100 is oval, when the size of the tab glue 100 and the size of the tab 500 satisfy (B - C / 2) / A > 1, the safety risk of the battery 200 is relatively low. Specifically, it can be referred to the following table. From the following table, it can be obtained that when (B - C / 2) / A > 1, the safety risk of the battery 200 is relatively low.

[0048] Embodiment Short radius A / mm Long radius B / mm Tab width / mm (B - C / 2) / A Safety risk Embodiment 1 3 7 6 1.33 Lower Embodiment 2 3 5 6 0.67 Higher

[0049] Table 1

[0050] Furthermore, the tab glue 100 mainly plays the role of sealing with the shell 300. In order to prevent the electrolyte in the shell 300 from flowing out, the connection between the tab glue 100 and the shell 300 is more critical. In order to effectively ensure the reliability of the connection between the tab glue 100 and the shell 300, the tab glue 100 can be made to protrude relative to the connection between the shell 300, thereby avoiding a small contact area between the tab glue 100 and the shell 300 and reducing the sealing effect. For details, please refer to Figures 3 to 4 In some embodiments, the tab glue 100 includes a body 140, a first protrusion 150, and a second protrusion 160, the first protrusion 150 and the second protrusion 160 are respectively connected to both ends of the body 140, the body 140 is connected to the housing 300, the first protrusion 150 protrudes out of the housing 300, and the second protrusion 160 is located in the storage cavity 310. After the first protrusion 150 protrudes out of the housing 300 and the second protrusion 160 is located in the storage cavity 310, the sealing effect of the tab glue 100 and the housing 300 can be improved.

[0051] For further information, please refer to Figures 3 to 4 In some embodiments, along the length direction of the battery 200, the size of the first protrusion 150 is D, 0.2mm<D<2mm. Specifically, the size of the first protrusion 150 can be 0.3mm, 0.4mm, 1mm or 1.8mm. When the size of the first protrusion 150 is greater than 2mm, since the distance between the first protrusion 150 and the protrusion of the shell 300 is too large, this will cause the energy density of the battery 200 to be too low. When the size of the first protrusion 150 is less than 0.2mm, since the size of the first protrusion 150 is small, the sealing effect of the ear glue 100 and the shell 300 will be poor, thereby reducing the yield of the battery 200.

[0052] For further information, please refer to Figures 3 to 4 In some embodiments, along the length direction of the battery 200, the size of the second protrusion 160 is F, 0.1mm<F. Specifically, the size of the second protrusion 160 can be 0.2mm, 0.25mm, 0.3mm, etc., wherein, if the size of the second protrusion 160 is less than 0.1mm, then it is possible that the size of the second protrusion 160 is too small, resulting in poor sealing effect between the tab glue 100 and the housing 300, resulting in electrochemical corrosion and leakage inside the battery 200.

[0053] Further, in some embodiments, the thickness of the tab glue 100 is G, where 0.03 mm ≤ G ≤ 0.5 mm. Specifically, the thickness of the tab glue 100 can be 0.03 mm, 0.04 mm, 0.1 mm, 0.3 mm, 0.4 mm, or 0.5 mm. When the thickness of the tab glue 100 is less than 0.03 mm, since the thickness of the tab glue 100 is too thin, the tab glue 100 may be melted through during hot pressing. When the thickness of the tab glue 100 is greater than 0.5 mm, the excessive thickness of the tab glue 100 may result in poor bonding effect.

[0054] Further, in some embodiments, there are two tab glues 100, and the two tab glues 100 are respectively connected to both sides of the tab 500. Specifically, the two tab glues 100 are respectively bonded to both sides of the tab 500, which can effectively prevent the tab 500 from contacting the housing 300, reduce the risk of short circuit of the battery 200, and improve the safety of the battery 200.

[0055] In some embodiments, the electronic device includes the battery 200 in any one of the above embodiments. The tab glue 100 includes three parts, namely, a middle part 110, a first part 120, and a second part 130. The middle part 110 is used to connect to the tab 500, that is, the middle part 110 is connected to the tab 500. It can be imagined that when the battery 200 is encapsulated, the middle part 110 of the tab glue 100 contacts the tab 500. Therefore, the middle part 110 will shrink after being heated, while the ends of the first part 120 and the second part 130 that are far from the middle part 110 are far from the tab 500, so they are less affected by heat and will not shrink. Specifically, in the direction from the first part 120 to the middle part 110, the width of the first part 120 gradually increases, and in the direction from the second part 130 to the middle part 110, the width of the second part 130 gradually increases. In this way, even if the first part 120 and the second part 130 will extend under the action of the hot pressing tool, it can still effectively ensure that the widths of the first part 120 and the second part 130 do not exceed the width of the middle part 110, which can effectively prevent the length of the tab glue 100 exposed relative to the aluminum plastic film from being too large. Specifically, the tab glue 100 can effectively improve the yield rate of the battery 200. Further, the battery 200 with the tab glue 100 has a high yield rate. Still further, the electronic device with the battery 200 has high safety.

[0056] The above has described the embodiments of the present invention in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. Tab glue, used for bonding tabs, characterized in that, The tab glue includes: a middle part, a first part, and a second part. The middle part includes an opposite first end and second end. The first part is connected to the first end, and the second part is connected to the second end. Along the length direction of the tab glue, the first part, the middle part, and the second part are arranged in sequence. The middle part is used for bonding the tab. Wherein, in the direction from the first part to the middle part, the width of the first part gradually increases, and the maximum width of the first part is not greater than the width of the first end. In the direction from the second part to the middle part, the width of the second part gradually increases, and the maximum width of the second part is not greater than the width of the second end.

2. The battery is characterized in that, Comprising: A housing having a storage cavity; A battery cell disposed in the storage cavity; A tab, one end of which is connected to the battery cell, and the other end of the tab protrudes relative to the housing; The tab glue according to claim 1, one side of the tab glue is connected to the housing, and the other side of the tab glue is connected to the tab.

3. The battery according to claim 2, wherein The shape of the tab glue is oval.

4. The battery according to claim 3, wherein The short radius of the tab glue is A, the long radius of the tab glue is B, and the width of the tab is C. 2 mm ≤ A ≤ 6 mm, 2 mm ≤ B ≤ 6 mm, 1 mm ≤ C ≤ 20 mm.

5. The battery according to claim 3, characterized in that, The short radius of the tab glue is A, the long radius of the tab glue is B, and the width of the tab is C. (B - C / 2) / A > 1.

6. The battery according to claim 2, wherein The tab glue includes a body part, a first protruding part, and a second protruding part. The first protruding part and the second protruding part are respectively connected to both ends of the body part. The body part is connected to the housing. The first protruding part protrudes outside the housing, and the second protruding part is located in the storage cavity.

7. The battery according to claim 6, characterized in that, Along the length direction of the battery, the dimension of the first protruding part is D, 0.2 mm < D < 2 mm.

8. The battery according to claim 6, characterized in that, Along the length direction of the battery, the dimension of the second protruding part is F, 0.1 mm < F.

9. The battery according to claim 2, characterized in that, The thickness of the tab glue is G, 0.03 mm ≤ G ≤ 0.5 mm.

10. The battery according to claim 2, characterized in that, There are two tab glues, and the two tab glues are respectively connected to both sides of the tab.

11. An electronic device, characterized in that, Including the battery according to any one of claims 2 to 10.

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