CN216958432U

CN216958432U - Battery and electronic device

Info

Publication number: CN216958432U
Application number: CN202220662002.7U
Authority: CN
Inventors: 卫志达; 彭宁
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-12
Anticipated expiration: 2032-03-24

Abstract

The application provides a battery and electronic equipment, relates to the technical field of lithium batteries, and aims to solve the problem that an insulating tape is easy to warp and fall off when the battery is packaged in the related technology; be provided with utmost point ear on the electricity core body, insulating glue film encircles and sets up on the inner peripheral surface of casing, just insulating glue film encircles cladding utmost point ear, and the battery that this application provided, insulating glue film have certain viscidity and insulating nature, on guaranteeing utmost point ear and casing non-contact's basis, can also guarantee that insulating glue film end to end overlaps each other and bonds continuously to avoid when the encapsulation, the insulating tape rises the risk that sticks up easily and drop, has guaranteed the stability of encapsulation in the at utmost, and is favorable to the processing production of battery.

Description

Battery and electronic device

Technical Field

The application relates to the technical field of lithium ion batteries, in particular to a battery and electronic equipment.

Background

Common lithium ion batteries are divided into button batteries, cylindrical batteries and square batteries according to the appearance, and the cylindrical batteries mainly comprise a battery shell and a battery cell body, wherein the battery cell body is positioned in the battery shell, and tabs are welded on the battery cell body.

In general, in order to avoid short circuit caused by contact between the tab and the battery case, an insulating tape, which is usually a PP insulating tape or a PE/PC composite tape, is often disposed between the tab and the battery case, and the insulating tape is wrapped around the outer circumferential surface of the tab during processing.

However, the insulating tape is easily warped and peeled off during packaging, which is not favorable for processing and production of the battery.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one problem mentioned in the background art, the embodiment of the application provides a battery and electronic equipment, and the insulating glue film has certain viscidity and insulating nature, on the basis of guaranteeing that utmost point ear and casing do not contact, can also guarantee that the insulating glue film overlaps each other end to end and bonds continuously to avoid when the encapsulation, the risk that the insulating tape rises the perk easily and drops, guaranteed the stability of encapsulation to the at utmost, and be favorable to the processing production of battery.

In order to achieve the above object, a first aspect of the embodiments of the present application provides a battery, including a casing, a cell body, and an insulating glue layer located on the casing, where the casing has a cavity, and the cell body is located in the cavity;

the battery cell comprises a battery cell body and is characterized in that tabs are arranged on the battery cell body, an insulating adhesive layer is arranged on the inner circumferential surface of the shell in a surrounding mode, and the insulating adhesive layer surrounds and covers the tabs.

In the above battery, optionally, the insulating glue layer has a head end and a tail end, and the head end and the tail end are at least partially overlapped and bonded.

In the above battery, optionally, there is an adhesive overlap region between the head end and the tail end; the extending length of the bonding overlapping area is not less than 3mm along the extending direction of the insulating glue layer, and the extending length of the bonding overlapping area is not less than 2mm along the extending direction perpendicular to the insulating glue layer.

In the above battery, optionally, the insulating glue layer includes a first insulating glue layer, and the first insulating glue layer is located on the casing;

the first insulation glue layer surrounds and covers the battery cell body and is bonded with the battery cell body, and the first insulation glue layer surrounds and covers at least part of the tabs.

In the above battery, optionally, the tab is planar, and a top surface of the tab protrudes out of an end surface of the first insulation adhesive layer;

the difference range between the top surface of the tab and the end surface of the first insulation glue layer is not more than 1 mm.

In the above battery, optionally, the insulating adhesive layer further includes a second insulating adhesive layer, an end portion of the second insulating adhesive layer is connected to an end portion of the first insulating adhesive layer, and the second insulating adhesive layer is located on one side of the first insulating adhesive layer, which is far away from the battery cell body.

In the above battery, optionally, the first insulating adhesive layer has a higher adhesiveness than the second insulating adhesive layer.

In the above battery, optionally, the first insulating adhesive layer includes a first base material and a first adhesive layer, and the first adhesive layer covers an outer circumferential surface of the first base material;

the second insulating glue layer comprises a second base material and a second glue layer, and the second glue layer is coated on the peripheral face of the second base material.

In the battery, optionally, the first adhesive layer is bonded to an end surface of the first base material, the end surface being close to the cell body;

and/or the second adhesive layer is bonded on the end face, close to one side of the battery cell body, of the second base material.

In the battery, optionally, the battery further includes a current collector, the current collector is disposed at one end of the tab, which is far away from the battery cell body, and the current collector and the tab are located at the same side of the battery cell body;

and along the extension direction of the shell, the surface of the second insulating adhesive layer protrudes out of the surface of the current collecting piece, and the second insulating adhesive layer is coated on the outer peripheral surface of the lug and the current collecting piece in a surrounding manner.

In the above battery, optionally, a height difference between the surface of the second insulating adhesive layer and the surface of the current collecting plate is not less than 3 mm; and/or the presence of a gas in the gas,

the height difference range between the surface of the second insulating glue layer and the shell opening of the shell is not less than 2 mm.

In the above battery, optionally, the battery further includes a top cover, the top cover is connected to the casing through the current collecting piece, and the top cover and the casing together enclose to form the cavity.

In the above battery, optionally, the battery further comprises an adapter sheet, wherein the adapter sheet is located between the top cover and the current collecting sheet, and the top cover is connected with the current collecting sheet through the adapter sheet;

the adapter plate has the kink, the cladding is encircleed to second insulating glue film the kink.

The second aspect of the embodiments of the present application further provides an electronic device, which includes an electronic device body and the above battery, where the battery is electrically connected to the electronic device body and configured to provide electric energy to the electronic device body.

According to the battery and the electronic equipment, the insulating glue layer is arranged, and the insulating glue layer has certain insulativity, so that the insulating glue layer is coated on the peripheral surface of the lug, and the phenomenon of short circuit caused by direct contact between the lug and a battery shell can be avoided; secondly, insulating glue film has certain viscidity, and insulating glue film encircles the outer peripheral face that bonds at utmost point ear to the head and the tail of insulating glue film overlap each other and bond continuously, thereby when encapsulating the battery, the risk that the upwarp drops can not appear in insulating glue film, has guaranteed the stability of encapsulation to the at utmost, and is favorable to the processing production of battery.

In addition to the technical problems solved by the embodiments of the present application, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems that the battery and the electronic device provided by the embodiments of the present application can solve, 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 application or the technical solutions in the prior art, the drawings needed to be 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 application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a battery provided in an embodiment of the present application;

fig. 2 is a front view of a battery provided in an embodiment of the present application;

fig. 3 is a cross-sectional view of a first insulating glue layer and a second insulating glue layer provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of an interposer provided in an embodiment of the present application.

Description of reference numerals:

100-a battery; 110-a housing; 111-a cavity;

120-a cell body; 130-an insulating glue layer; 131-a first insulating glue layer;

132-a second insulating glue layer; 140-a current collector; 150-a top cover;

160-an interposer; 161-bending part.

Detailed Description

Common lithium ion battery is divided into button cell, cylindrical battery and square battery according to the appearance to cylindrical battery is taken as an example, and cylindrical battery mainly includes battery shell and electric core body, and wherein, battery shell has the cavity, and electric core body is arranged in battery shell's cavity, is provided with utmost point ear on the electric core body, and utmost point ear mainly welds the one side that is close to the casing shell mouth through the welded mode at electric core body.

The conventional tab used in the flexible package battery is usually formed by drawing one or more tab metal strips side by side into equidistant parallel lines in the same plane, and then drawing two insulating tapes in a direction perpendicular to the metal strips on two side surfaces of the several parallel tab metal strips, wherein the insulating tapes are usually composite tapes of PP or PE and PC, and are called tab adhesives, and the tab adhesives are welded on the two side surfaces of the metal strips in a thermal welding manner, so that the problem of short circuit caused by the contact of the tab and a shell is avoided.

However, the insulating tape used in the prior art does not have a certain viscosity, and when the battery is packaged, the head end and the tail end of the insulating tape are only overlapped with each other and coated on the peripheral surface of the tab, which easily causes the risk that the insulating tape warps and falls off, so that the stability of the battery package cannot be ensured, and the battery is not beneficial to the processing and production.

Therefore, in order to solve the above technical problems, the present application provides a battery and an electronic device, wherein an insulating adhesive layer is provided, and the insulating adhesive layer has a certain insulating property, so that the insulating adhesive layer covers the outer circumferential surface of the tab, thereby avoiding the short circuit caused by the direct contact between the tab and the battery case; secondly, the insulating glue layer has certain viscosity, so that the insulating glue layer is bonded to the peripheral surface of the tab in a surrounding manner, and the head and the tail of the first insulating glue layer are mutually overlapped and bonded, so that the insulating glue layer does not have the risk of warping and falling when the cell body is packaged, the packaging stability is ensured to the maximum extent, and the processing and production of the battery are facilitated; and thirdly, the problem that after the battery cell body is packaged, the metal strips of the lugs extrude the inner side of the shell of the aluminum-plastic film to cause damage of the aluminum-plastic film or leakage caused by electrochemical corrosion can be effectively prevented.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.

Fig. 1 is a schematic structural diagram of a battery provided in an embodiment of the present application, fig. 2 is a front view of the battery provided in the embodiment of the present application, fig. 3 is a cross-sectional view of a first insulating adhesive layer and a second insulating adhesive layer provided in the embodiment of the present application, and fig. 4 is a schematic structural diagram of an interposer provided in the embodiment of the present application.

Example one

Referring to fig. 1 to 4, an embodiment of the present application provides a battery 100, where the battery 100 includes a casing 110 and a cell body 120, the casing 110 has a cavity 111, the cell body 120 is located in the cavity 111, and by including the cavity 111, the cavity 111 can play a role in protecting the cell body 120, so as to avoid a problem that the cell body 120 is contaminated by external pollution.

In this embodiment, the battery cell body 120 is provided with tabs, and it should be noted that the battery 100 is divided into positive and negative electrodes, the tabs are metal conductors that lead the positive and negative electrodes out of the battery cell body 120, and the tabs are divided into three materials: the positive electrode of the battery 100 is made of an aluminum material, and the negative electrode of the battery 100 is made of a nickel material, or the negative electrode of the battery 100 is also made of a copper-nickel material, and both of them are formed by combining a film and a metal band.

Specifically, the tab may be welded to the cell body 120 by a welding method, for example: ultrasonic welding, laser welding, riveting, current energy storage welding, current welding or spot welding and other modes can be adopted, or the tab can be arranged on the battery cell body 120 in other modes, and the method is not further limited in the embodiment.

In addition, during encapsulation, the case 110 is often made of an aluminum plastic film, and since the metal strip of the tab and the aluminum plastic film are both made of metal materials, when the metal strip of the tab contacts the aluminum plastic film, a short circuit occurs between the metal strip and the aluminum plastic film, so as shown in fig. 1 and 2, an insulating adhesive layer 130 is provided in the present application, wherein the insulating adhesive layer 130 covers the inner circumferential surface of the case, and the insulating adhesive layer 130 surrounds and covers the tab.

Therefore, in the first aspect, the insulating adhesive layer 130 has a certain insulating property, so that the phenomenon of short circuit caused by direct contact between the metal strip and the aluminum-plastic film can be avoided; in the second aspect, the insulating adhesive layer 130 has a certain viscosity, so that the insulating adhesive layer 130 is bonded around the outer peripheral surface of the tab, and thus when the cell body 120 is packaged, the insulating adhesive layer 130 does not have a risk of warping and dropping, the packaging stability is ensured to the maximum extent, and the processing and production of the battery 100 are facilitated; on the other hand, after the battery cell body 120 is packaged, the metal strips of the tabs can be effectively prevented from extruding the inner side of the casing 110 of the aluminum-plastic film, so that the problem of damage of the aluminum-plastic film or leakage caused by electrochemical corrosion can be effectively prevented.

In a mode that can realize, insulating glue layer 130 has head end and tail end, and the head end and the tail end of insulating glue layer 130 bond continuously to the surrounding cladding is on the outer peripheral face of utmost point ear, and like this, the head end and the tail end of insulating glue layer 130 overlap each other and bond continuously, thereby when encapsulating electric core body 120, insulating glue layer 130 can not appear the risk that the perk drops, has guaranteed the stability of encapsulation to the at utmost, and is favorable to battery 100's processing production.

In a realizable manner, a bonding overlapping area is arranged between the head end and the tail end of the insulating glue layer 130, so that the bonding area between the head end and the tail end of the insulating glue layer 130 can be increased to the maximum extent during packaging, and the problem of insufficient firmness in bonding is avoided.

Specifically, along the extending direction of the insulating adhesive layer 130, the overlapping length of the bonding overlapping area may be not less than 3mm, for example, the overlapping length of the bonding overlapping area may be 3mm, 5mm, or 8mm, and the like, similarly, the overlapping width of the bonding overlapping area may be not less than 2mm, for example, the overlapping thickness of the bonding overlapping area may be 2mm, 5mm, or 8mm, it should be noted that, in this embodiment, neither the overlapping length nor the overlapping width of the bonding overlapping area is further defined, specifically, the bonding area between the head end and the tail end of the insulating adhesive layer 130 may be increased, and it is within the protection range of the present application to avoid the risk that the insulating adhesive layer 130 warps and falls off.

In one implementation, referring to fig. 3, the insulating glue layer 130 includes a first insulating glue layer 131, and the first insulating glue layer 131 is located on the casing 110, wherein the first insulating glue layer 131 surrounds and covers the cell body 120, and is bonded to the cell body 120, and an end of the first insulating glue layer 131 extends in a direction away from the casing 110, and surrounds and covers at least a portion of the tab.

Therefore, on one hand, the first insulating glue layer 131 has certain insulativity, so that the phenomenon of short circuit caused by direct contact of a metal belt of a tab and an aluminum plastic film can be further avoided; in a second aspect, the first insulating adhesive layer 131 has a certain viscosity, and can ensure the bonding effect with the cell body 120.

In an implementation manner, the tab is planar, and along the extending direction of the casing 110, the top surface of the tab protrudes out of the end surface of the first insulation adhesive layer 131, it should be noted that in this embodiment, the tab is disposed on the battery cell body 120, specifically, the tab is first kneaded to form a plane, and then the plane formed by the tab is disposed on the battery cell body 120.

Wherein, the difference range between the top surface of utmost point ear and the terminal surface of first insulation glue film 131 is not more than 1mm, promptly, one can realize the mode be: the top surfaces of the tabs are flush with the end surface of the first insulation glue layer 131; thus, the first insulation glue layer 131 covers the entire tab.

Another way that can be realized is: in the extending direction of the casing 110, the top surface of the tab is higher than the end surface of the first adhesive insulation layer 131, so that the first adhesive insulation layer 131 covers part of the tab, wherein in this embodiment, the difference range between the two is not greater than 1mm, and may be, for example, 0.2mm, 0.5mm, or 0.8mm, etc., which is not further limited in this embodiment.

In a realizable manner, referring to fig. 3, the insulating adhesive layer 130 may further include a second insulating adhesive layer 132, wherein an end portion of the second insulating adhesive layer 132 is connected to an end portion of the insulating adhesive layer 130, the second insulating adhesive layer 132 is located on a side of the first insulating adhesive layer 131 away from the cell body 120, and by providing the second insulating adhesive layer 132, on one hand, the second insulating adhesive layer 132 has a certain insulating property, so that a phenomenon that a metal strip of a tab directly contacts with an aluminum-plastic film to cause a short circuit can be further avoided; in the second aspect, the second insulating adhesive layer 132 has a certain viscosity, and can ensure the bonding effect with the cell body 120.

In an implementation manner, the viscosity of the first adhesive insulation layer 131 is greater than that of the second adhesive insulation layer 132, that is, the second adhesive insulation layer 132 may be made of a material with a relatively low viscosity, such as yellow glue, and the first adhesive insulation layer 131 may be made of a material with a relatively high viscosity, such as black glue or white glue, where the viscosities of the materials are sequentially white glue, black glue, and yellow glue from high to low.

The white glue is characterized in that the adhesive layer of the white glue is CPP, the middle functional layer is PP with high melting point, and the melting point of the CPP layer is 121 ℃, so that the white glue has good adhesive property; the adhesive layer of the black glue is a mixed layer of PP, PE and melanin, the middle functional layer is PEN polyester, the melting point of PP is 137 ℃, the melting point of PE is 103 ℃, and the formed mixed layer has good adhesion and flexibility, strong viscosity, and excellent mechanical property and high temperature resistance; the bonding layer of the yellow glue is a mixed layer of PP and PE, and the middle functional layer is non-woven fiber.

The first insulating adhesive layer 131 is set to have strong adhesiveness, so that the bonding effect between the first insulating adhesive layer 131 and the cell body 120 can be ensured to the greatest extent; through setting up second insulating adhesive layer 132 for weak viscidity, like this, on the one hand, can guarantee that the head and the tail both ends of second insulating adhesive layer 132 can bond together to avoid taking place the risk that the perk drops, on the other hand also can avoid viscidity too big and make second insulating adhesive layer 132 bond other positions, perhaps self bond together and cause the problem of inefficacy.

Specifically, the first adhesive layer 131 may include a first base material and a first adhesive layer, and the first adhesive layer covers the outer peripheral surface of the first base material, wherein the thickness of the first base material is not less than 0.06mm, and the thickness of the first adhesive layer is not less than 0.02mm, and for example, the thickness of the first adhesive layer may be 0.02mm, 0.05mm, or 0.08 mm.

Likewise, the second insulating glue layer 132 may include a second base material and a second glue layer, and the second glue layer is coated on the outer circumferential surface of the second base material, wherein the thickness of the second base material is not less than 0.06mm, the thickness of the second glue layer is not less than 0.02mm, and exemplarily, the thickness of the second glue layer may be 0.02mm, 0.05mm, or 0.08 mm.

In this embodiment, the thicknesses of the first adhesive insulation layer 131 and the second adhesive insulation layer 132 are not further limited, and may be specifically set according to actual needs.

In an implementation manner, an end surface of the first adhesive layer 131 close to the cell body 120 is an adhesive area, and an end surface of the first adhesive layer 131 far from the cell body 120 is a non-adhesive area, that is, the first adhesive layer is bonded to an end surface of the first base material close to the cell body 120, so that the adhesion between the first adhesive layer 131 and the metal strip of the tab can be ensured, and the problem of failure caused by the adhesion of the first adhesive layer 131 to the casing 110 can be avoided.

Similarly, the end surface of the second insulating adhesive layer 132 close to the cell body 120 is an adhesive area, and the end surface of the second insulating adhesive layer 132 far from the cell body 120 is a non-adhesive area, that is, the second adhesive layer is bonded to the end surface of the second substrate close to the cell body 120, so that the adhesion between the second insulating adhesive layer 132 and the cell body 120 can be ensured, and the problem of failure caused by the second insulating adhesive layer 132 being bonded to the casing 110 can be avoided.

In an implementation manner, referring to fig. 1, a current collecting plate 140 may be further included, the current collecting plate 140 is disposed at one end of the tab far away from the cell body 120, and the current collecting plate 140 and the tab are located at the same side of the cell body 120, where the current collecting plate 140 may be welded on the cell body 120 by a welding manner, for example: ultrasonic welding, laser welding, riveting, current energy storage welding, current welding or spot welding and other modes can be adopted, or the current energy storage welding and spot welding can also be arranged on the battery cell body 120 in other modes, and the current energy storage welding and spot welding are not further limited in the embodiment.

It should be added that the current collecting plate 140 is an important component of the battery 100, and functions as a conductive bridge connecting the plates of the battery 100 and the case 110 of the battery 100, wherein, along the extending direction of the case 110, the surface of the second insulating adhesive layer 132 protrudes out of the surface of the current collecting plate 140, and the second insulating adhesive layer 132 surrounds and covers the outer peripheral surfaces of the tabs and the current collecting plate 140, so that the tabs can be completely covered to the maximum extent, and the tabs cannot contact the case 110 to cause a short circuit.

In one implementation, the height difference between the surface of the second insulating adhesive layer 132 and the surface of the current collecting plate 140 is not less than 3mm, and the height between the two may be 3mm, 5mm or 8 mm. By limiting the range of the height difference between the surface of the insulating adhesive layer 130 and the surface of the current collecting plate 140, it is possible to ensure that the tab is completely covered to the maximum extent, so that it cannot contact the case 110 to cause a short circuit.

In addition, the height difference between the surface of the second insulating glue layer 132 and the shell opening of the shell 110 is not less than 2mm, for example, the height difference between the surface of the second insulating glue layer 132 and the shell opening of the shell 110 may be 2mm, 5mm or 8mm, and the height difference between the surface of the second insulating glue layer 132 and the shell opening of the shell 110 is defined, so that there is enough space for coating the tab.

In an implementation manner, referring to fig. 1, a top cover 150 may be further included, where the current collecting plate 140 serves as a conductive bridge to connect the top cover 150 to the casing 110, and by including the top cover 150, the top cover 150 is connected to the casing 110, and the top cover 150 and the casing 110 jointly enclose the cavity 111, so that a protection effect on the cell body 120 can be further achieved.

In one implementation, referring to fig. 1 and 4, an interposer 160 may be further included, wherein the interposer 160 is positioned between the top cover 150 and the manifold block 140, such that the top cover 150 and the manifold block 140 are connected via the interposer 160.

It should be noted that, the interposer 160 in this embodiment is a soft material, the interposer 160 has a bending portion 161, and the second insulating adhesive layer 132 surrounds the bending portion 161, so that the bending portion 161 is disposed, so that the connection area between the top cover 150 and the current collecting plate 140 is increased, and the connection effect is better.

Example two

On the basis of the first embodiment, a second embodiment of the present application further provides an electronic device, which includes an electronic device body and the battery 100, wherein the battery 100 is electrically connected to the electronic device body and configured to provide electric energy to the electronic device body.

It should be noted that the electronic device in this embodiment may be a wearable electronic device, for example: the wearable electronic device can be a watch, a mobile phone, a sports bracelet and the like, the electronic device body can be a shell of the wearable device, and the battery 100 is positioned in the shell; alternatively, the electronic device may be other electronic products, such as a computer; alternatively, the electronic device may be a medical electronic device used in medical treatment, and the like, and this embodiment is not limited to this, and any electronic device that needs to supply electric power may be used.

Other technical features are the same as those of the first embodiment and can achieve the same technical effects, and are not described in detail herein.

The electronic device provided in this embodiment includes the battery 100, and the battery 100 is provided with the insulating adhesive layer 130, first, the insulating adhesive layer 130 has a certain insulating property, so that the insulating adhesive layer 130 covers the outer circumferential surface of the tab, and the phenomenon of short circuit caused by direct contact between the tab and the case 110 of the battery 100 can be avoided; secondly, the insulating glue layer 130 has certain viscosity, so that the insulating glue layer 130 is bonded to the outer peripheral surface of the tab in a surrounding manner, and the head and the tail of the insulating glue layer 130 are mutually overlapped and bonded, so that when the battery 100 is packaged, the insulating glue layer 130 does not have the risk of warping and falling, the packaging stability is ensured to the greatest extent, and the processing and production of the battery 100 are facilitated; and then, the problem that the aluminum-plastic film is damaged or leakage is caused by extrusion of the metal strips of the tabs on the inner side of the shell of the aluminum-plastic film after the battery cell body 120 is packaged can be effectively prevented.

In the description of the present application, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, as used herein, indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the position or element so referred to must have a particular orientation, be of particular construction and operation, and thus should not be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, releasably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still 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 application.

Claims

1. The battery is characterized by comprising a shell, a cell body and an insulating glue layer positioned on the shell, wherein the shell is provided with a cavity, and the cell body is positioned in the cavity;

the battery cell body is provided with a tab, and the insulating adhesive layer is arranged on the inner circumferential surface of the shell in a surrounding manner;

and the insulating glue layer surrounds and wraps the tab.

2. The battery of claim 1, wherein the layer of insulating glue has a head end and a tail end, the head end and the tail end at least partially overlapping and adhesively attached.

3. The battery of claim 2, wherein there is an adhesive overlap region between the head end and the tail end; wherein, the first and the second end of the pipe are connected with each other,

along the extending direction of insulating glue film, the extending length of bonding overlap region is not less than 3mm, along the extending direction of perpendicular to insulating glue film, the extending length of bonding overlap region is not less than 2 mm.

4. The battery of any of claims 1-3, wherein the layer of insulating glue comprises a first layer of insulating glue, the first layer of insulating glue being located on the housing;

5. The battery of claim 4, wherein the tab is planar, and the top surface of the tab protrudes from the end surface of the first adhesive insulation layer along the extension direction of the casing;

6. The battery of claim 5, wherein the layers of insulating glue further comprise a second layer of insulating glue, an end of the second layer of insulating glue being connected to an end of the first layer of insulating glue,

the second insulating glue layer is located on one side, far away from the battery cell body, of the first insulating glue layer.

7. The battery of claim 6, wherein the first layer of insulating glue has a greater tackiness than the second layer of insulating glue.

8. The battery of claim 7, wherein the first adhesive layer comprises a first base material and a first adhesive layer, and the first adhesive layer is coated on the outer circumferential surface of the first base material;

and/or the second insulating glue layer comprises a second base material and a second glue layer, and the second glue layer is coated on the peripheral surface of the second base material.

9. The battery of claim 8, wherein the first adhesive layer is adhered to an end surface of the first substrate, which is close to the cell body;

10. The battery of claim 9, further comprising a current collector disposed at an end of the tab remote from the cell body, wherein the current collector and the tab are located on a same side of the cell body;

along the extending direction of the shell, the surface of the second insulating adhesive layer protrudes out of the surface of the current collecting piece, and the second insulating adhesive layer surrounds and covers the outer peripheral surfaces of the pole lug and the current collecting piece.

11. The battery of claim 10, wherein the range of height difference between the surface of the second insulating glue layer and the surface of the current collector sheet is not less than 3 mm; and/or the presence of a gas in the gas,

12. The battery of claim 11, further comprising a top cover connected to the housing by the current collector, the top cover and the housing together enclosing the cavity.

13. The battery of claim 12, further comprising an interposer, the interposer being positioned between the top cover and the current collector, the top cover being connected to the current collector through the interposer;

14. An electronic device comprising an electronic device body and the battery according to any one of claims 1 to 13;

the battery is electrically connected with the electronic equipment body and is configured to provide electric energy for the electronic equipment body.