阅读说明：本技术 极耳结构及极耳结构的制作方法 (Tab structure and manufacturing method thereof ) 是由 谷新运 曾祥雄 彭宁 于 2021-09-08 设计创作，主要内容包括：本发明提供了一种极耳结构及极耳结构的制作方法,涉及锂电池技术领域,以解决相关技术中外露部与内嵌部在焊接时,容易出现虚焊的问题。该极耳结构包括外露部、内嵌部及连接转接部,至少部分外露部与内嵌部重叠相连,连接转接部连接外露部和内嵌部。本发明中通过设置连接转接部,能够避免因出现虚焊而导致短路的风险。(The invention provides a tab structure and a manufacturing method of the tab structure, relates to the technical field of lithium batteries, and aims to solve the problem that insufficient welding is easy to occur when an exposed part and an embedded part are welded in the related technology. The tab structure comprises an exposed part, an embedded part and a connecting and switching part, wherein at least part of the exposed part is overlapped and connected with the embedded part, and the connecting and switching part is connected with the exposed part and the embedded part. According to the invention, the risk of short circuit caused by insufficient soldering can be avoided by arranging the connecting and switching part.)

1. A tab structure is characterized by comprising an exposed part, an embedded part and a connecting and switching part, wherein at least part of the exposed part is overlapped and connected with the embedded part, and the connecting and switching part is connected with the exposed part and the embedded part.

2. A tab structure as claimed in claim 1, wherein the connection transfer part includes a first connection part and at least two second connection parts, the at least two second connection parts being spaced apart and connected to the first connection part;

the first connecting portion is provided with at least one first connecting area, each second connecting portion is provided with at least one second connecting area, the first connecting areas are connected with the exposed portions, and the second connecting areas are connected with the embedded portions.

3. A tab structure as claimed in claim 1, wherein the embedded portion is provided with an extension portion, and the extension portion forms the connection adaptor portion; the extension part is connected with the exposed part.

4. The tab structure as claimed in claim 3, wherein at least two connection regions are provided at intervals on the exposed portion, one of the connection regions is located at an end portion of the exposed portion on a side close to the embedded portion, and the connection region on the side close to the embedded portion is connected to the embedded portion;

the connecting area far away from one side of the embedded part is connected with the extending part.

5. The tab structure of claim 4, wherein at least two of the connection regions are disposed in parallel on the exposed portion.

6. The tab structure as claimed in any one of claims 1 to 5, further comprising a tab glue covering the exposed portion, the connection adaptor portion and the embedded portion.

7. The tab structure of claim 6, wherein the tab glue covers one outer surface of the exposed portion, the connection transferring portion and the embedded portion;

or the lug glue covers the outer surfaces of the two sides of the exposed part, the connection switching part and the embedded part.

8. A tab structure as claimed in any one of claims 1-5, wherein the connection transition has a thickness of 50-80 μm;

the peripheral corners of the connection transfer portion are provided with chamfer structures.

9. The tab structure as claimed in any one of claims 1 to 5, wherein the width of the exposed part is between 2 and 10mm, the thickness of the exposed part is between 50 and 100 μm, the width of the embedded part is between 4 and 30mm, and the thickness of the embedded part is between 30 and 50 μm;

the cross-sectional area of the exposed part is equal to that of the embedded part.

10. A method for manufacturing a tab structure, which is used for manufacturing the tab structure according to any one of claims 1 to 9, the method comprising:

connecting the exposed part and the embedded part;

connecting the switching part and the exposed part;

connecting the switching part and the embedded part and forming a tab structure;

leveling and dedusting the welding marks on the outer surface of the tab structure;

and covering the lug glue on the outer surfaces of the exposed part, the connection switching part and the embedded part by adopting a hot-pressing fusion and cold-pressing mode.

Technical Field

The invention relates to the technical field of lithium batteries, in particular to a tab structure and a manufacturing method of the tab structure.

Background

The tab is a core accessory with extremely high safety risk of a lithium ion polymer battery product and is an important component for welding an internal structure of a battery core and an external component. For example, a tab is needed for a mobile phone battery, a bluetooth battery, a notebook battery and the like used in our lives.

Wherein, when the welding, the afterbody of utmost point ear links to each other with the electrode core body, because the thickness of utmost point ear afterbody and the thickness difference of electrode core body are great, can reduce the energy density of electrode core body like this, consequently often adopt "T nature utmost point ear" among the existing, "T nature utmost point ear" is including exposing portion and embedded portion, wherein, the thickness of embedded portion is thinner, and the thickness of exposing portion is thicker, and the one end of embedded portion links to each other with the electrode core body, and the other end of embedded portion links to each other with the exposing portion.

However, the conventional exposed portion and the embedded portion are easily subjected to cold joint during welding.

Disclosure of Invention

In order to solve at least one problem mentioned in the background art, the invention provides a tab structure and a manufacturing method of the tab structure.

In order to achieve the above object, in a first aspect, the present invention provides a tab structure, which includes an exposed portion, an embedded portion, and a connection adapter portion, wherein at least a portion of the exposed portion is connected to the embedded portion in an overlapping manner, and the connection adapter portion connects the exposed portion and the embedded portion.

In the above tab structure, optionally, the connection adapter portion includes a first connection portion and at least two second connection portions, and the at least two second connection portions are disposed at an interval and connected to the first connection portion;

the first connecting portion is provided with at least one first connecting area, each second connecting portion is provided with at least one second connecting area, the first connecting areas are connected with the exposed portions, and the second connecting areas are connected with the embedded portions.

In the above tab structure, optionally, an extension part is disposed on the embedded part, and the extension part forms the connection switching part; the extension part is connected with the exposed part.

In the tab structure, optionally, at least two connection areas are arranged on the exposed portion at intervals, one of the connection areas is located at an end portion of the exposed portion close to the embedded portion, and the connection area close to the embedded portion is connected with the embedded portion;

the connecting area far away from one side of the embedded part is connected with the extending part.

In the tab structure, at least two connection regions may be disposed in parallel on the exposed portion.

In the above tab structure, optionally, the tab structure further includes a tab glue, and the tab glue covers the exposed portion, the connection switching portion, and the embedded portion.

In the above tab structure, optionally, the tab glue covers the outer surfaces of one side of the exposed portion, the connection switching portion and the embedded portion;

or the lug glue covers the outer surfaces of the two sides of the exposed part, the connection switching part and the embedded part.

In the tab structure, optionally, the thickness of the connection adapter is 50-80 μm;

the peripheral corners of the connection transfer portion are provided with chamfer structures.

In the tab structure, optionally, the width of the exposed part is between 2 and 10mm, the thickness of the exposed part is between 50 and 100 μm, the width of the embedded part is between 4 and 30mm, and the thickness of the embedded part is between 30 and 50 μm;

the cross-sectional area of the exposed part is equal to that of the embedded part.

In a second aspect, the present invention provides a method for manufacturing a tab structure, which is used for manufacturing the tab structure, and the method for manufacturing the tab structure includes:

connecting the exposed part and the embedded part;

connecting the switching part and the exposed part;

connecting the switching part and the embedded part and forming a tab structure;

leveling and dedusting the welding marks on the outer surface of the tab structure;

and covering the lug glue on the outer surfaces of the exposed part, the connection switching part and the embedded part by adopting a hot-pressing fusion and cold-pressing mode.

According to the lug structure and the manufacturing method of the lug structure, the connecting and switching part is arranged and is connected with the exposed part and the embedded part, so that the welding area between the exposed part and the embedded part is increased, the welding firmness between the exposed part and the embedded part is improved, and the risk of short circuit caused by infirm welding in the prior art is solved.

In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions, other technical problems that can be solved by the tab structure, the electrode core, and the pouch battery provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of an exposed portion, an embedded portion and a connection adapter portion of a first structure according to the present invention;

FIG. 2 is an assembly view of the exposed portion, the embedded portion and the connection adapter portion of the first structure according to the present invention;

FIG. 3 is an exploded view of an exposed portion, an embedded portion and a connection adapter portion of a second structure according to the present invention;

FIG. 4 is an assembly view of the exposed portion, the embedded portion and the connection adapter portion of the second structure according to the present invention;

fig. 5 is a schematic flow chart of a manufacturing method of the tab structure provided by the present invention.

Description of reference numerals:

100-tab configuration;

10-an exposed portion;

11-a third attachment zone;

12-a fourth attachment zone;

20-an embedded part;

21-an extension;

30-connecting the switching part;

31-a first connection;

311-first connection region;

32-a second connection;

321-a second connecting zone;

40-pole ear glue;

41-a first sealant;

42-second sealant.

Detailed Description

The tab is a component of a soft package lithium ion battery product. The battery is divided into a positive electrode and a negative electrode, the tabs are metal conductors leading out the positive electrode and the negative electrode from the electrode core body, namely, the ears of the positive electrode and the negative electrode of the battery are contact points during charging and discharging. The positive electrode of the battery is made of aluminum (Al) material, the negative electrode is made of nickel (Ni) material, and the negative electrode is also made of copper nickel (Ni-Cu) material, which are compounded by a film and a metal belt.

Traditional utmost point ear structure is straight form, utmost point ear when this body coupling of electrode core, utmost point ear need extend along the long limit direction or the minor face direction of electrode core body, need keep straight state promptly, consequently, when the encapsulation, the holistic length or the width of electrode core body need calculate the part that utmost point ear stretches out, because the thickness difference nature of the thickness of utmost point ear and electrode core body is great on the one hand like this, on the other hand makes the effective length of electrode core body shorten, thereby reduce the energy density of electrode core body.

In order to improve the energy density of the electrode core body, a T-shaped tab is often adopted in the prior art, wherein the T-shaped tab means that the longitudinal section of the tab is in a T shape, the T-shaped tab comprises an exposed portion and an embedded portion, the embedded portion is thinner and thicker, one end of the embedded portion is connected with the electrode core body, the other end of the embedded portion is connected with the exposed portion, and the embedded portion and the exposed portion are welded together in the prior art by adopting an ultrasonic welding mode.

In order to solve the technical problems, the invention provides a tab structure and a manufacturing method of the tab structure.

Through setting up the connection switching portion, the first joining region of connection switching portion connection and embedded portion have increased the welding area between portion that exposes and the embedded portion, have improved the welding fastness between portion that exposes and the embedded portion, have solved among the prior art because of the insecure risk that leads to the short circuit of welding.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is an exploded schematic view of an exposed portion, an embedded portion and a connection and transfer portion of a first structure provided by the present invention, fig. 2 is an assembly view of the exposed portion, the embedded portion and the connection and transfer portion of the first structure provided by the present invention, fig. 3 is an exploded schematic view of the exposed portion, the embedded portion and the connection and transfer portion of a second structure provided by the present invention, fig. 4 is an assembly view of the exposed portion, the embedded portion and the connection and transfer portion of the second structure provided by the present invention, and fig. 5 is a flow schematic view of a manufacturing method of a tab structure provided by the present invention.

Example one

Referring to fig. 1 to 4, a tab structure 100 according to an embodiment of the present invention is provided, where the tab structure 100 may include an exposed portion 10, an embedded portion 20, and a connection adaptor portion 30, where at least a portion of the exposed portion 10 is connected to the embedded portion 20 in an overlapping manner, that is, an overlapping area is formed between the exposed portion 10 and the embedded portion 20, and specifically, an area of the overlapping area is not limited in this embodiment. Thus, during assembly, the exposed part 10 is positioned above the embedded part 20, and the connection switching part 30 is connected with the exposed part 10 and the embedded part 20, namely, the connection switching part 30 can be used as a middle welding part, so that the welding area between the exposed part 10 and the embedded part 20 can be increased, and the problem of infirm welding is avoided.

In this embodiment, the welding manner between the connection adapter 30 and the exposed portion 10 may be ultrasonic welding, laser welding, riveting, current energy storage welding, current welding, or spot welding, and the like, and the same manner may also be adopted for the connection between the connection adapter 30 and the embedded portion 20.

It should be noted that, the sizes of the exposed portion 10, the embedded portion 20 and the connection adapter portion 30 are not further limited, because the sizes of the exposed portion 10, the embedded portion 20 and the connection adapter portion 30 can be set according to the model or the size of the electrode core, as long as the welding area can be increased, and the problem of the occurrence of the cold joint when the exposed portion 10 and the embedded portion 20 are welded in the prior art is solved, which belongs to the protection scope of the present application. The shape of the connection adapter 30 is not limited to any more.

The tab structure 100 provided by the invention comprises an exposed part 10, an embedded part 20 and a connecting and switching part 30, wherein at least part of the exposed part 10 is connected with the embedded part 20 in an overlapping manner, the connecting and switching part 30 is connected with the exposed part 10 and the embedded part 20, and the connecting and switching part 30 is arranged to connect the exposed part 10 and the embedded part 20, so that the welding area between the exposed part 10 and the embedded part 20 is increased, the welding firmness between the exposed part 10 and the embedded part 20 is improved, and the risk of short circuit caused by infirm welding in the prior art is solved.

Further, in the present embodiment, the arrangement shape of the connection adapter 30 may include multiple implementation manners, and the following two arrangement manners are specifically taken as examples in the present embodiment to describe:

as shown in fig. 1 and fig. 2, the connection adapter 30 may include a first connection portion 31 and at least two second connection portions 32, where the at least two second connection portions 32 are disposed at intervals and connected to the first connection portion 31, and exemplarily, the connection adapter may include two second connection portions 32, may include three second connection portions 32, and may also include a plurality of second connection portions 32, in this embodiment, specifically, two second connection portions 32 are provided as an example for description, and the two second connection portions 32 are respectively connected to two ends of the first connection portion 31. At least one first connection region 311 is disposed on the first connection portion 31, at least one second connection region 321 is disposed on the two second connection portions 32, and similarly, the number of the first connection regions 311 and the second connection regions 321 is not particularly limited.

In the present embodiment, at least two connection areas may be disposed on the exposed portion 10 at intervals, and in the present embodiment, the two connection areas are specifically illustrated as an example, for example, a third connection area 11 and a fourth connection area 12 are disposed on the exposed portion 10, where the third connection area 11 is located on an end portion of the exposed portion 10 close to the embedded portion 20, and the fourth connection area 12 is located on a side of the exposed portion 10 far from the embedded portion 20.

Thus, during assembly, as shown in fig. 2, the first connection region 311 is connected with the exposed portion 10, the two second connection regions 321 are connected with the embedded portion 20, and the third connection region 11 is connected with the embedded portion 20, wherein the number of welding points arranged on the first connection region 311, the second connection region 321 and the third connection region 11 is not further limited, the connection of the connection switching portion 30 and the exposed portion 10 is realized by arranging the first connection region 311, the welding area between the connection switching portion 30 and the exposed portion 10 is increased, and secondly, the connection of the connection switching portion 30 and the embedded portion 20 is realized by arranging the second connection region 321, and the welding area between the connection switching portion 30 and the embedded portion 20 is increased.

Another possible implementation manner is that, as shown in fig. 3 and 4, an extension portion 21 may be disposed on the embedded portion 20, wherein the extension portion 21 forms a connection switching portion 30, and a fourth connection region 12 is disposed on the exposed portion 10, so that during assembly, the fourth connection region 12 is connected to the extension portion 21, thereby achieving connection between the exposed portion 10 and the embedded portion 20, and secondly, by further disposing the fourth connection region 12 on the exposed portion 10, even if a problem of a cold joint occurs during welding in the third connection region 11 on the exposed portion 10, a risk of a short circuit can be avoided, thereby improving safety of use.

In the present embodiment, the connection adapter 30 formed by the extension portion 21 is integrally formed with the embedded portion 20.

Furthermore, at least two connecting areas are arranged on the exposed part 10 in parallel, namely the third connecting area 11 is parallel to the fourth connecting area 12, so that when the third connecting area 11 is connected with the embedded part 20, the connecting area can be increased, and the connecting stability is improved; similarly, when the fourth connection region 12 is connected to the extension portion 21, the connection area can be increased, thereby improving the connection stability.

Further, the thickness of the connection adapter portion 30 may be between 50 μm and 80 μm, for example, the thickness of the connection adapter portion 30 may be 50 μm, the thickness of the connection adapter portion 30 may be 70 μm, and the thickness of the connection adapter portion 30 may also be 80 μm, which is not further limited in this embodiment, by setting the thickness of the connection adapter portion 30 between 50 μm and 80 μm, on one hand, it may be avoided that when the thickness of the connection adapter portion 30 is too thin, the effect of increasing the welding area may not be achieved, and on the other hand, when the thickness of the connection adapter portion 30 is too thick, the problem of weak welding may easily occur.

In addition, the corners of the connection switching part 30 are arranged to be chamfered, and the corners of the third connection region 11 are arranged to be chamfered, so that when the connection switching part 30 is welded with the exposed part 10 and the embedded part 20, the probability of generating gaps and bubbles between the connection switching part 30 and the exposed part 10 and between the connection switching part 30 and the embedded part 20 can be reduced, and the quality of the battery is improved.

Further, the width of the exposed portion 10 may be between 2 and 10mm, the thickness of the exposed portion 10 may be between 50 and 100 μm, for example, the width of the exposed portion 10 may be 2mm, the width of the exposed portion 10 may be 5mm, the width of the exposed portion 10 may also be 10mm, likewise, the thickness of the exposed portion 10 may be 50 μm, the thickness of the exposed portion 10 may be 80 μm, and the thickness of the exposed portion 10 may also be 100 μm, which is not further limited in this embodiment.

In addition, the width of the embedded portion 20 may be between 4 and 30mm, the thickness of the embedded portion 20 may be between 30 and 50 μm, and for example, the width of the embedded portion 20 may be 4mm, the width of the embedded portion 20 may be 15mm, the width of the embedded portion 20 may also be 30mm, the thickness of the embedded portion 20 may be 30 μm, the thickness of the embedded portion 20 may be 40 μm, and the thickness of the embedded portion 20 may also be 50 μm, which is not further limited in this embodiment.

It should be noted that, in this embodiment, the thickness of the embedded portion 20 is smaller than the thickness of the exposed portion 10, so that when the embedded portion 20 is connected to the electrode core body, the problem of large difference between the thickness of the tab and the thickness of the electrode core body is avoided, the problem of poor thickness consistency of the electrode core body in the prior art is solved, and the energy density of the electrode core body is improved.

The product of the width of the exposed part 10 and the thickness of the exposed part 10 is equal to the product of the width of the embedded part 20 and the thickness of the embedded part 20, namely, the cross-sectional area of the exposed part 10 is equal to the cross-sectional area of the embedded part 20, so that even under the condition that the size of the exposed part 10 is different from that of the embedded part 20, the longitudinal cross-sectional areas of the exposed part 10 and the embedded part 20 can still be ensured to be equal, meanwhile, the exposed part 10 is connected with the embedded part 20 in an overlapping mode, namely, the exposed part 10 is welded with the embedded part 20 in an overlapping mode, and therefore the same overcurrent capacity of the electrode core body can be ensured.

Further, the tab adhesive 40 is further included, wherein the tab adhesive 40 covers the exposed part 10, the connection adapting part 30 and the embedded part 20; alternatively, the tab paste 40 covers the first connection region 311, the second connection region 321, the third connection region 11, and the fourth connection region 12, which helps to improve the connection stability during encapsulation.

One way that can be implemented is: the tab glue 40 covers the outer surfaces of the exposed part 10, the connection adapting part 30 and the embedded part 20 on one side; the second way that can be realized is: the tab glue 40 covers the outer surfaces of the exposed portion 10, the connection adapting portion 30 and the embedded portion 20 on both sides. Wherein, when the adoption covers the both sides surface, can further improve the firm of connecting and decide to avoid the problem of rosin joint.

Specifically, the tab glue 40 may include a first sealant 41 and a second sealant 42, the first sealant 41 covers the surfaces of the first connection region 311, the second connection region 321, and the third connection region 11, the second sealant 42 covers the surface of the inner embedding portion 20, the exposed portion 10, the inner embedding portion 20, the connection switching portion 30, and the tab glue 40 are tightly attached to each other, so that bubbles are not easily generated during packaging, and the problem that the air tightness of the electrode core body is affected by the random movement of bubbles in the tab glue 40 is avoided.

In this embodiment, the tab glue 40 may be a plastic part, for example, the tab glue 40 may be a PP plastic material, wherein the PP plastic may include OPP (oriented polypropylene), cpp (cast polypropylene), and ppf (polypropylene fiber), wherein OPP refers to oriented polypropylene, and is characterized by good sealing performance and strong anti-counterfeiting performance; CPP refers to unstretched polypropylene and is characterized by excellent water vapor and peculiar smell barrier property; the film is multifunctional and can be used as a composite material basal film; metallization treatment can be carried out; the product has excellent demonstration performance as food and commodity package and outer package, and can be still clearly seen under the package; the PPF is polypropylene fiber which has the characteristics of light weight, high strength, good elasticity, wear resistance, corrosion resistance, electrical insulation and heat retention.

Example two

Referring to fig. 5, the present embodiment provides a method for manufacturing a tab structure, which is used to manufacture the tab structure 100 in the first embodiment, and the method for manufacturing the tab structure 100 may include:

s1: connecting the exposed portion 10 and the embedded portion 20. The step of connecting the exposed portion 10 and the embedded portion 20 may include:

the exposed portion 10 is positioned above the embedded portion 20, and at least a portion of the exposed portion 10 overlaps and abuts the embedded portion 20. By arranging the overlapping connection between the exposed portion 10 and the embedded portion 20, the welding area between the exposed portion 10 and the embedded portion 20 can be increased.

In the step of connecting the exposed portion 10 and the embedded portion 20, the exposed portion 10 is provided with the third connection region 11, and the connection between the exposed portion 10 and the embedded portion 20 is realized by the third connection region 11, so that the welding area between the exposed portion 10 and the embedded portion 20 is increased.

The overlapping size of the exposed portion 10 and the embedded portion 20 may be between 2-5mm, wherein the overlapping size in this embodiment may be the overlapping length, and exemplarily, the overlapping size of the exposed portion 10 and the embedded portion 20 may be 2mm, the overlapping size of the exposed portion 10 and the embedded portion 20 may be 3mm, and the overlapping size of the exposed portion 10 and the embedded portion 20 may also be 5 mm.

After the exposed part 10 and the embedded part 20 are connected, the exposed part 10 and the embedded part 20 are welded, wherein the connection can be realized in an ultrasonic welding mode, and the advantages of easy operation and good welding effect are achieved.

S2: the adapter portion 30 is connected with the exposed portion 10.

In the step of connecting the adapting portion 30 and the exposed portion 10, a first connecting portion 31 and two opposite second connecting portions 32 may be disposed on the adapting portion 30, two ends of the first connecting portion 31 are respectively connected to the two second connecting portions 32, a first connecting region 311 is disposed on the first connecting portion 31, and by disposing the first connecting region 311, the connection between the adapting portion 30 and the exposed portion 10 is achieved, and the welding area between the adapting portion 30 and the exposed portion 10 is increased.

After the connection of the adapter portion 30 and the exposed portion 10, the connection may be performed by first performing ultrasonic welding and then performing laser welding, which is not specifically limited in this embodiment.

S3: the transition part 30 is connected with the embedded part 20, and a tab structure is formed.

In the step of connecting the adapter portion 30 and the embedded portion 20, the second connecting portion 32 is provided with the second connecting region 321, and by providing the second connecting region 321, the connection between the adapter portion 30 and the embedded portion 20 is realized, and the welding area between the adapter portion 30 and the embedded portion 20 is increased.

After the adaptor portion 30 and the embedded portion 20 are connected, the connection may be performed by first performing ultrasonic welding and then performing laser welding, which is not particularly limited in this embodiment.

S4: after the step of connecting the adapter portion 30 and the embedded portion 20 and forming the tab structure 100, the method further includes: and (3) beating and dedusting the welding print on the outer surface of the tab structure 100, so that the outer surface of the tab structure 100 reaches the target flatness.

S5: after the step of leveling and dedusting the solder print on the outer surface of the tab structure 100, the method further comprises: and covering the lug glue 40 on the outer surfaces of the exposed part 10, the connection switching part 30 and the embedded part 20 by adopting a hot-press fusion and cold-press mode.

In the step of covering the tab glue 40, the tab glue 40 may include a first sealant 41 and a second sealant 42, the first sealant 41 covers the surfaces of the first connection region 311, the second connection region 321, and the third connection region 11, the second sealant 42 covers the surface of the embedded portion 20, and the exposed portion 10, the embedded portion 20, the connection switching portion 30, and the tab glue 40 are tightly attached to each other, so that bubbles are not easily generated during packaging, thereby avoiding the problem that the air tightness of the electrode core body is affected by the random movement of bubbles in the tab glue 40.

In this embodiment, the tab glue 40 may be a plastic part, for example, the tab glue 40 may be a PP plastic material, wherein the PP plastic may include OPP (oriented polypropylene), cpp (cast polypropylene), and ppf (polypropylene fiber), wherein OPP refers to oriented polypropylene, and is characterized by good sealing performance and strong anti-counterfeiting performance; CPP refers to unstretched polypropylene and is characterized by excellent water vapor and peculiar smell barrier property; the film is multifunctional and can be used as a composite material basal film; metallization treatment can be carried out; the product has excellent demonstration performance as food and commodity package and outer package, and can be still clearly seen under the package; the PPF is polypropylene fiber which has the characteristics of light weight, high strength, good elasticity, wear resistance, corrosion resistance, electrical insulation and heat retention.

In the description of the embodiments of the present invention, it should be understood that the terms "mounted," "connected," and "welded" are to be construed broadly, e.g., as meaning fixedly welded, indirectly connected through intervening media, communicating between two elements, or interacting between two elements, unless expressly stated or limited otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.