CN216085236U - Utmost point ear, electric core and use device of electric core - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a lug, a battery cell and a device using the battery cell, wherein the lug comprises: a conductor part; the tab glue is arranged on the conductor part and is used for being connected with the top sealing edge of the aluminum-plastic film; the insulating shielding part is arranged on the conductor part and/or the tab glue; the insulating shielding part is provided with an embedding groove used for shielding the edge of the top sealing edge, or the insulating shielding part and the tab glue are enclosed to form the embedding groove used for shielding the edge of the top sealing edge. Can effectively reduce the border of top banding and contact with utmost point ear and lead to the risk of short circuit to can restrict the removal or the swing at the border of top banding, improve the stability of sheltering from it, and then do benefit to the stability and the security that improve electric core.

Description

Utmost point ear, electric core and use device of electric core

Technical Field

The utility model relates to the technical field of batteries, in particular to a lug, a battery cell and a device using the battery cell.

Background

The tab generally includes a conductor portion and a tab compound provided on the conductor portion. The tab is connected with the top sealing edge of the aluminum plastic film of the battery cell in an insulation way and in a sealing way through the tab glue.

However, in the process of implementing the present application, the inventor finds that the aluminum layer at the edge of the top edge of the aluminum-plastic film is exposed to the outside, and is likely to contact with the tab to cause a short circuit, and particularly when a plurality of battery cells are stacked, the short circuit is more likely to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tab, which aims to solve the technical problem that the edge of a top sealing edge of an aluminum plastic film of a battery cell in the prior art is easy to contact with the tab to cause short circuit.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a tab, be applied to on the electric core, the electric core includes the plastic-aluminum membrane, tab includes: a conductor part; the tab glue is arranged on the conductor part and is used for being connected with the top sealing edge of the aluminum-plastic film; the insulating shielding part is arranged on the conductor part and/or the tab glue; the insulating shielding part is provided with an embedding groove used for shielding the edge of the top sealing edge, or the insulating shielding part and the tab glue are enclosed to form the embedding groove used for shielding the edge of the top sealing edge.

The technical scheme of the utility model at least has the following technical effects or advantages: the pole lug provided by the utility model is provided with the conductor part, the pole lug glue arranged on the conductor part and the insulating shielding part arranged on the conductor part and/or the pole lug glue, the conductor part can be connected with the top sealing edge of the aluminum plastic film through the pole lug glue, and meanwhile, the insulating shielding part is provided with the placing groove for shielding the edge of the top sealing edge, or the insulating shielding part and the tab glue are enclosed to form an insertion groove for shielding the edge of the top sealing edge, so that when the tab glue is connected with the top sealing edge, the edge of the top sealing edge of the aluminum-plastic film can extend into the insertion groove and be shielded by the insulating shielding part, thereby effectively reducing the risk of short circuit caused by the contact of the edge of the top sealing edge and the pole ear, and, because the putting groove is the cell body structure, can restrict the removal or the swing at the border of top banding to can improve the effect of sheltering from it, guarantee to carry out the stability of sheltering from to it, and then do benefit to the stability and the security that improve electric core.

In one embodiment, along the length direction of the conductor part, the insulating shielding part is arranged at one end of the tab glue, and the opening of the putting groove faces to the other end of the tab glue.

By adopting the technical scheme, when the tab glue is connected with the top sealing edge of the aluminum-plastic film, the edge of the top sealing edge can extend into the groove to be shielded; one side departing from the opening of the putting groove can be free from tab glue, the width of the tab glue is favorably and properly reduced, and the material is saved.

In one embodiment, the two opposite sides of the conductor part are respectively provided with the insulating shielding part along the thickness direction of the conductor part, so that the two opposite sides of the conductor part are respectively provided with the placing groove.

By adopting the technical scheme, when the tab glue is connected with the two opposite top sealing edges of the aluminum-plastic film, the edges of the two opposite top sealing edges can respectively extend into the placing groove along the two opposite sides of the conductor part so as to shield the edges of the two opposite top sealing edges, thereby avoiding the edge of one top sealing edge from being exposed outside to contact with the tab to cause short circuit and improving the safety.

In one embodiment, the length of the insulating shielding portion is greater than or equal to the width of the conductor portion in the width direction of the conductor portion.

Through adopting above-mentioned technical scheme for the border of the top banding in the width range of conductor portion all can stretch into puts into the groove and is sheltered from, further reduces the border and the contact of utmost point ear of top banding and takes place the risk of short circuit.

In one embodiment, the insulating shield portion includes: a base connected to the conductor part and/or the tab paste; and a blocking edge part connected to the base part; the base part, the blocking edge part and the tab glue are encircled to form the placing groove.

Through adopting above-mentioned technical scheme, the groove of putting into that the base portion, fender portion and utmost point ear glue enclose to close formation, close for three sides promptly and one side open-ended puts into the groove, not only do benefit to the border of top banding and stretch into, and can improve the restriction at the border of opposite top banding to improve the effect of sheltering from at the border of opposite top banding.

In one embodiment, the included angle a formed between the blocking edge part and the base part is less than or equal to 90 degrees.

Through adopting above-mentioned technical scheme, do benefit to the opening that makes the income groove of putting that forms and be the throat form or straight mouthful form, can reduce the possibility that the border of top banding shifts out to put the income groove, improves the border of top banding and puts stability in putting the groove to improve and shelter from the effect.

In one embodiment, the insulating shielding part and the tab glue are of an integral structure.

Through adopting above-mentioned technical scheme, the formation of insulating occlusion part not only is convenient for, and can improve the structural reliability of insulating occlusion part, and then guarantees the effect of sheltering from to the border of top banding.

In one embodiment, the insertion groove is an open groove penetrating through opposite ends of the insulating shielding part.

By adopting the technical scheme, the edge of the top edge sealing edge can be conveniently and directly placed into the open slot, and even if the length of the top edge sealing edge is greater than that of the open slot, the top edge sealing edge can still be smoothly placed into the open slot.

Another object of the present invention is to provide a battery cell, including: an aluminum-plastic film having a top seal edge; and the utmost point ear of above-mentioned arbitrary embodiment, utmost point ear glue with the top banding is connected, put the opening orientation in the groove in the plastic-aluminum membrane, the border of top banding stretches into put in the groove.

According to the battery cell provided by the embodiment of the utility model, due to the adoption of the tab of the embodiment, the risk of short circuit caused by the contact of the edge of the top sealed edge of the aluminum-plastic film of the battery cell and the tab can be effectively reduced, the stability of shielding the edge of the top sealed edge can be ensured, and the stability and the safety of the battery cell can be further improved.

It is a further object of the present invention to provide an apparatus using the battery cell of the above embodiment, wherein the battery cell is used for providing electric energy.

According to the device using the battery cell provided by the embodiment of the utility model, the battery cell of the embodiment is adopted, so that the stability and the safety of the device using the battery cell can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a tab according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic front view of a tab according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the structure at B in FIG. 3;

fig. 5 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of the structure at C in FIG. 5;

fig. 7 is a schematic view of a front view structure of a battery cell according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view taken along the line D-D in FIG. 7;

FIG. 9 is an enlarged view of a portion E of FIG. 8;

fig. 10 is a schematic structural view of an insulating shielding portion disposed on a conductor portion (the insulating shielding portion and a tab glue are enclosed to form a placement groove) according to another embodiment of the present invention;

fig. 11 is a schematic structural view of an insulating shielding portion disposed on a tab glue (the insulating shielding portion and the tab glue enclose to form a slot);

FIG. 12 is a schematic structural view of an insulating shielding portion disposed on a conductor portion (the insulating shielding portion has a slot) according to still another embodiment of the present invention;

fig. 13 is a schematic structural view of an insulating shielding portion provided on the conductor portion and the tab glue (the insulating shielding portion and the tab glue enclose to form an insertion slot).

Wherein, in the figures, the respective reference numerals:

10. a tab; 11. a conductor part; 12. gluing a tab; 13. an insulating shielding portion; 130. placing the mixture into a groove; 131. a base; 132. a blocking edge part; 100. an electric core; 20. an aluminum-plastic film; 21. and (6) sealing the top edge.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 tab generally includes a conductor portion and a tab compound provided on the conductor portion. The tab glue is fused with the heat sealing layer at the top sealing edge of the aluminum plastic film of the battery core through high-temperature hot melting, so that the tab is in insulation connection and sealing connection with the aluminum plastic film. The aluminum-plastic film generally comprises an outer nylon layer, an intermediate aluminum layer and an inner heat-sealing layer which are sequentially arranged from outside to inside, the layers can be bonded through an adhesive, and the heat-sealing layer can be a CPP layer (the Chinese of CPP is called cast polypropylene film, and English is called cast polypropylene) or a PP layer (the Chinese of PP is called polypropylene, and English is called polypropylene).

As part of the inventive process, the inventor of the present invention, after many tests and verifications, finds that the aluminum layer at the edge of the top sealed edge of the aluminum-plastic film is exposed to the outside and is easily contacted with the tab to cause short circuit, and particularly when a plurality of battery cells are stacked and the tab of each battery cell is connected, the tab is easily contacted with the edge of the top sealed edge of the aluminum-plastic film of the adjacent battery cell, so that the probability of the tab being contacted with the edge of the top sealed edge is increased, and the risk of short circuit occurrence is increased.

Based on this, for solving the technical problem that the edge of the top sealing edge of the aluminum-plastic film of the battery cell is easy to contact with the tab to cause short circuit, the inventor provides the following scheme.

Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a tab 10, which is applied to a battery core, where the battery core includes a battery core and an aluminum-plastic film, the aluminum-plastic film wraps the battery core, the aluminum-plastic film has a top sealing edge, the tab 10 is used to be connected to the top sealing edge of the aluminum-plastic film, one end of the tab 10 may be connected to the battery core, and the other end extends to the outside of the aluminum-plastic film, so as to lead out a positive electrode or a negative electrode of the battery core; fig. 5 and 6 schematically show the battery cell 100, the aluminum-plastic film 20, and the top sealing edge 21; the tab 10 includes a conductor portion 11, a tab compound 12 and an insulating shielding portion 13, wherein:

one end of the conductor part 11 is used for being connected with a pole piece of the battery core, and the other end of the conductor part is used for extending to the outside of the aluminum-plastic film, so that the positive pole or the negative pole of the battery core is led out; the conductor part 11 may have a sheet structure or a strip structure, and the conductor part 11 may be made of a conductive material so as to be conductive, and may be made of nickel plating of copper, aluminum, nickel, or copper, for example, or may be made of aluminum when the tab 10 is used as a positive electrode tab, or may be made of nickel plating of copper, nickel, or copper when the tab 10 is used as a negative electrode tab, but is not limited thereto.

The tab glue 12 is arranged on the conductor part 11 and is used for being in heat-sealing connection with the top sealed edge 21 of the aluminum-plastic film 20, so that the conductor part 11 is in insulation sealing connection with the aluminum-plastic film 20, and the conductor part 11 can be fixed with the battery core 100; it is understood that any tab adhesive material may be used as the tab adhesive 12.

The insulating shielding part 13 is arranged on the conductor part 11 and/or the tab glue 12, that is, the insulating shielding part 13 may be arranged only on the conductor part 11, only on the tab glue 12, or both the conductor part 11 and the tab glue 12; the insulating shielding portion 13 is made of an insulating material, and may be made of the same material as the tab compound 12, but is not limited thereto, and may be made of other insulating materials.

In one case, the insulating shielding portion 13 has an insertion groove 130 for shielding the edge of the top sealing edge 21, that is, the insulating shielding portion 13 itself has an insertion groove 130 opened therein, into which the edge of the top sealing edge 21 can be inserted, as shown in fig. 12; in another case, the insulating shielding part 13 and the tab glue 12 enclose to form an insertion groove 130 for shielding the edge of the top sealing edge 21, that is, the insulating shielding part 13 and the tab glue 12 cooperate to form an insertion groove 130 in the empty area between the two, so as to allow the edge of the top sealing edge 21 to be inserted, as shown in fig. 10, 11 and 13; it will be appreciated that the insertion groove 130 is a groove structure having an opening, and is an open space rather than a closed space.

According to the tab 10 provided by the embodiment of the utility model, by arranging the conductor part 11, the tab glue 12 arranged on the conductor part 11 and the insulating shielding part 13 arranged on the conductor part 11 and/or the tab glue 12, the conductor part 11 can be connected with the top sealed edge 21 of the aluminum-plastic film 20 through the tab glue 12, and the insulating shielding part 13 has the insertion groove 130 for shielding the edge of the top sealed edge 21, or the insulating shielding part 13 and the tab glue 12 enclose the insertion groove 130 for shielding the edge of the top sealed edge 21, so that when the tab glue 12 is connected with the top sealed edge 21, the edge of the top sealed edge 21 of the aluminum-plastic film 20 can extend into the insertion groove 130 and be shielded by the insertion groove 130, and the edge of the top sealed edge 21 close to the conductor part 11 is prevented from being exposed to the outside, thereby effectively reducing the risk of short circuit caused by the contact of the edge of the top sealed edge 21 and the tab, and, because the putting groove 130 is of a groove structure, the inner wall of the putting groove 130 can limit the movement or swing of the edge of the top seal edge 21, and the phenomenon that the top seal edge 21 is exposed to the outside due to the fact that the top seal edge 21 is not limited by the outside and is easy to move out when stressed is avoided, so that the shielding effect of the edge of the top seal edge 21 can be improved, the shielding stability of the top seal edge 21 is ensured, and the stability and the safety of the battery cell 100 are improved.

In an embodiment, please refer to fig. 1 to 4, wherein the length direction marked in fig. 1 and 3 is the length direction of the conductor portion 11, along the length direction of the conductor portion 11, the insulating shielding portion 13 is disposed at one end of the tab glue 12, and the opening of the slot 130 faces to the other end of the tab glue 12, that is, the insulating shielding portion 13 is disposed at one end of the tab glue 12 away from the aluminum-plastic film 20, and at this time, only one side of the insulating shielding portion 13 close to the aluminum-plastic film 20 has the tab glue 12.

Due to the arrangement, when the tab glue 12 is connected with the top sealing edge 21 of the aluminum-plastic film 20, the edge of the top sealing edge 21 can extend into the groove 130 to be shielded, so that the edge of the top sealing edge 21 can be smoothly placed; moreover, because the insulating shielding part 13 is located at one end of the tab glue 12 deviating from the aluminum-plastic film 20, the tab glue does not need to be arranged on one side deviating from the opening of the placing groove 130, the width of the tab glue 12 is favorably reduced, and the material is saved.

It should be noted that, in some other embodiments, the insulating shielding portion 13 may also be disposed on the tab glue 12 and located in the middle of the tab glue 12, where the tab glue 12 is disposed on both sides of the insulating shielding portion 13.

In one embodiment, please refer to fig. 1 to 4, wherein the thickness direction indicated in fig. 3 is the thickness direction of the conductor portion 11, and along the thickness direction of the conductor portion 11, two opposite sides of the conductor portion 11 are respectively provided with an insulating shielding portion 13, so as to respectively have an inserting groove 130 at two opposite sides of the conductor portion 11; it is understood that the two insulating shielding portions 13 may be symmetrically disposed, that is, the position and structure of the two insulating shielding portions are the same, and of course, the two insulating shielding portions 13 may also be asymmetrically disposed, that is, at least one of the position and structure of one of the insulating shielding portions 13 may be different from the position and structure of the other insulating shielding portion 13.

According to the arrangement, because the aluminum-plastic film 20 is folded and buckled by the same aluminum-plastic film layer to wrap the battery core, or the battery core is wrapped by buckling two aluminum-plastic film layers, when the top sealing edges 21 of the aluminum-plastic film 20 are connected with the tab glue 12 in a heat-sealing manner, the tab glue 12 is clamped between the two opposite top sealing edges 21, and the three are connected, when the tab glue 12 is connected with the two opposite top sealing edges 21 of the aluminum-plastic film 20, the edges of the two opposite top sealing edges 21 can respectively extend into the placing groove 130 along the two opposite sides of the conductor part 11, so that the edges of the two opposite top sealing edges 21 are shielded, the phenomenon that the edge of one top sealing edge 21 is exposed outside to contact with a tab to cause short circuit is avoided, and the safety of the battery core 100 is further improved.

It should be noted that, in some other embodiments, only one side of the conductor part 11 may be provided with the insulating shielding part 13, and the other side is not provided with the insulating shielding part 13, in which case, the edge of the top sealing edge 21 on the side where the insulating shielding part 13 is located may be shielded to avoid being exposed.

In one embodiment, please refer to fig. 1 and 2, wherein the width direction indicated in fig. 1 is the width direction of the conductor portion 11, the length of the insulating shielding portion 13 is greater than or equal to the width of the conductor portion 11 along the width direction of the conductor portion 11, and the length of the insertion slot 130 is greater than or equal to the width of the conductor portion 11.

So set up for the border of the top banding 21 in the width range of conductor portion 11 all can stretch into and put into the groove 130 and be sheltered from, further reduces the border of top banding 21 and the contact of utmost point ear and the risk that takes place the short circuit.

It should be noted that, in other embodiments, the length of the insertion groove 130 may be smaller than the width of the conductor part 11 within a certain range.

In one embodiment, referring to fig. 2 and 4, the insulating shielding part 13 includes a base part 131 and a blocking edge part 132, and the base part 131 is connected to the conductor part 11 and/or the tab compound 12, that is, the base part 131 may be connected to only the conductor part 11, only the tab compound 12, or both the conductor part 11 and the tab compound 12; the edge portion 132 is connected to the base portion 131; wherein, the base part 131, the blocking edge part 132 and the tab glue 12 are enclosed to form a placing groove 130; the base portion 131 and the ledge portion 132 may be an integrally formed one-piece structure. Specifically, the base portion 131 and the blocking edge portion 132 may be substantially L-shaped, so as to form a more regular shape, but not limited thereto, and may also be other shapes.

So set up, basal portion 131, keep off along portion 132 and utmost point ear glue 12 and enclose the groove 130 of putting into that closes the formation, just three sides are sealed and one side open-ended puts into groove 130 promptly, not only do benefit to the border of top banding 21 and stretch into, and keep off along portion 132 and can be spacing between keeping off along portion 132 and utmost point ear glue 12 with the border of top banding 21, move and shift out and put into groove 130 towards one side that deviates from utmost point ear glue 12 when avoiding the border atress of top banding 21, can improve the limiting displacement to the border of top banding 21, thereby improve the effect of sheltering from at the border of top banding 21.

Optionally, in an embodiment, referring to fig. 4, an included angle a is formed between the edge portion 132 and the base portion 131, where a is equal to or less than 90 °, that is, the included angle formed between the edge portion 132 and the base portion 131 is a right angle or an acute angle.

So set up, do benefit to the opening that makes the groove 130 of putting into that forms and be the throat form or straight mouthful form, can reduce the possibility that the border of top banding 21 shifts out to put into groove 130, improve the border of top banding 21 and put into the stability of inslot to improve and shelter from the effect.

It should be noted that the included angle formed between the edge portion 132 and the base portion 131 is not limited to a right angle or an acute angle, and in other embodiments, the included angle formed between the edge portion 132 and the base portion 131 may also be an obtuse angle, and a should be less than 180 °, otherwise the insertion groove 130 cannot be formed.

In one embodiment, referring to fig. 2, 4 and 9, the insulating shielding portion 13 and the tab compound 12 are an integral structure, that is, the insulating shielding portion 13 and the tab compound 12 are integrally formed.

So set up, insulating occlusion part 13 can form together when conductor portion 11 is located to utmost point ear glue 12, the formation of the insulating occlusion part 13 of not only being convenient for, and can improve the structural strength between insulating occlusion part 13 and the utmost point ear glue 12, can improve the structural reliability of insulating occlusion part 13, and then guarantee the effect of sheltering from to the border of top banding 21.

It should be noted that, in some other embodiments, referring to fig. 10 to 13, the insulating shielding portion 13 and the tab glue 12 may also be formed separately, in which case, the insulating shielding portion 13 may be adjacent to the tab glue 12.

In one embodiment, referring to fig. 1 to 4 and fig. 6, the insertion groove 130 is an open groove penetrating through two opposite ends of the insulating shielding portion 13.

So set up, the direct open slot of putting into in the border of top banding 21 of being convenient for, even the length of top banding 21 is greater than the length of putting into the groove 130, still can be when utmost point ear glue 12 is connected with top banding 21, the border of top banding 21 stretches into smoothly and puts into the groove 130 and not blockked.

It is noted that in other embodiments, at least one of the opposing ends of the insertion groove 130 may be closed.

Referring to fig. 5 to 9, an embodiment of the utility model further provides a battery cell 100, where the battery cell 100 includes an aluminum-plastic film 20 and the tab 10 of any of the above embodiments, the aluminum-plastic film 20 has a top sealed edge 21, the tab glue 12 is connected to the top sealed edge 21 in a heat sealing manner, an opening of the slot 130 faces the aluminum-plastic film 20, and an edge of the top sealed edge 21 extends into the slot 130. It should be noted that, besides the above components, the battery cell 100 may also include other components constituting the battery cell, for example, a battery core, and the aluminum plastic film 20 wraps the battery core, which is well known to those skilled in the art, and therefore, will not be described herein again.

Because the battery cell 100 provided by the embodiment of the present invention employs the tab 10 of the above embodiment, the battery cell 100 also has the technical effects brought by the technical scheme of the tab 10, so that the risk of short circuit caused by the contact between the edge of the top seal edge 21 of the aluminum plastic film 20 of the battery cell 100 and the tab can be effectively reduced, the stability of shielding the edge of the top seal edge 21 can be ensured, and the stability and the safety of the battery cell 100 can be further improved.

An embodiment of the present invention further provides a device using a battery cell, where the battery cell 100 is the battery cell 100 of the above embodiment, and the battery cell 100 is used to provide electrical energy. The device using the battery cells may be a battery module, including a housing and a plurality of battery cells 100 disposed in the housing; the device using the battery core may be a battery pack, for example, a battery pack composed of a plurality of battery cores 100, or a battery pack composed of battery modules composed of battery cores 100; the device using the battery core can also be a vehicle, such as a new energy automobile, the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile, the battery core 100 can form a battery pack and be arranged in the vehicle, or a plurality of battery cores 100 can be directly arranged in an accommodating cavity of the vehicle; the device using the battery cell can also be a ship, an unmanned aerial vehicle or the like, but is not limited thereto.

Since the battery cell 100 of the above embodiment is adopted in the device using a battery cell according to the embodiment of the present invention, the device using a battery cell also has the technical effects brought by the technical solution of the tab 10, and the stability and the safety of the device using a battery cell can be improved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a utmost point ear is applied to on the electric core, electric core includes the plastic-aluminum membrane, its characterized in that, utmost point ear includes:

a conductor part;

the tab glue is arranged on the conductor part and is used for being connected with the top sealing edge of the aluminum-plastic film; and

the insulating shielding part is arranged on the conductor part and/or the tab glue;

the insulating shielding part is provided with an embedding groove used for shielding the edge of the top sealing edge, or the insulating shielding part and the tab glue are enclosed to form the embedding groove used for shielding the edge of the top sealing edge.

2. A tab as claimed in claim 1, wherein: the edge the length direction of conductor portion, insulating shielding part is located the one end that utmost point ear glued, put the opening orientation in the groove in the other end that utmost point ear glued.

3. A tab as claimed in claim 1, wherein: along the thickness direction of conductor portion, the relative both sides of conductor portion are equipped with one respectively insulating shielding part to the relative both sides of conductor portion have one respectively put the groove.

4. A tab as claimed in claim 1, wherein: the length of the insulating shielding portion is greater than or equal to the width of the conductor portion in the width direction of the conductor portion.

5. A tab as claimed in claim 1, wherein the insulating shield comprises:

a base connected to the conductor part and/or the tab paste; and

a ledge portion connected to the base portion;

the base part, the blocking edge part and the tab glue are encircled to form the placing groove.

6. A tab as set forth in claim 5, wherein: the included angle a formed between the blocking edge part and the base part is less than or equal to 90 degrees.

7. A tab as claimed in any one of claims 1 to 6, wherein: the insulating shielding part and the tab glue are of an integrated structure.

8. A tab as claimed in any one of claims 1 to 6, wherein: the placing groove is an open groove which penetrates through the two opposite ends of the insulating shielding part.

9. A battery cell, comprising:

an aluminum-plastic film having a top seal edge; and

the tab as claimed in any one of claims 1 to 8, wherein the tab glue is connected to the top sealing edge, the opening of the insertion groove faces the aluminum-plastic film, and the edge of the top sealing edge extends into the insertion groove.

10. A device using an electric core is characterized in that: the cell of claim 9, wherein the cell is configured to provide electrical energy.

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