CN216563438U

CN216563438U - Battery with a battery cell

Info

Publication number: CN216563438U
Application number: CN202123368518.5U
Authority: CN
Inventors: 厉成北; 宋轩; 王智峰; 卫志达; 章辉; 席阳; 彭宁
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-17
Anticipated expiration: 2031-12-28

Abstract

The utility model provides a battery, which comprises a battery cell, wherein the battery cell is provided with tabs, and the tabs comprise a first tab and a second tab; the shell, electric core sets up in the shell, the shell includes first output portion and second output portion, first output portion with all be equipped with the joint groove on the second output portion, first utmost point ear joint is fixed on the first output portion the joint inslot, second utmost point ear joint is fixed on the second output portion the joint inslot. The utility model can avoid the problem of tab deviation in the process of welding the tab and the output part.

Description

Battery with a battery cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery.

Background

The battery (button cell) is also called a button cell, has the characteristics of relatively stable discharge voltage, long storage life and the like, and is widely applied to terminal equipment such as earphones, watches, bracelets and the like.

The battery comprises a shell and an electric core arranged in the shell, the shell is provided with an output part electrically connected with the terminal equipment, the output part comprises a first output part and a second output part, the electric core is provided with a lug, the lug comprises a first lug and a second lug, the first lug is welded with the first output part, and the second lug is welded with the second output part to provide electric energy for the terminal equipment.

However, during the process of welding the tab and the output portion, the tab may be deviated relative to the housing, resulting in poor welding, short circuit, and other problems.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present invention provide a battery, which can avoid the problem of tab deviation during the welding process of the tab and the output portion.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the embodiment of the utility model provides a battery, which comprises a battery cell, wherein the battery cell is provided with tabs, and the tabs comprise a first tab and a second tab; the shell, electric core sets up in the shell, the shell includes first output portion and second output portion, first output portion with all be equipped with the joint groove on the second output portion, first utmost point ear joint is fixed on the first output portion the joint inslot, second utmost point ear joint is fixed on the second output portion the joint inslot.

In some possible embodiments, the housing comprises: a housing, the cell being located within the housing, the housing having an opening; the sealing cover is used for sealing the opening of the shell and comprises a first connecting part and a second connecting part, and the first connecting part and the second connecting part are both provided with the clamping grooves; an insulating member interposed between the first connection portion and the second connection portion; the first connecting portion is connected with the shell to form an output unit, one of the output unit and the second connecting portion forms the first output portion, and the other forms the second output portion.

In some possible embodiments, the joint groove is followed the internal face extension of closing cap, the opening direction in joint groove with the vertical of closing cap has the contained angle, first utmost point ear stretches into on the first output joint inslot, so that first utmost point ear paste dress on the internal face of first output, the second utmost point ear stretches into on the second output joint inslot, so that the second utmost point ear paste dress on the internal face of second output.

In some possible embodiments, the clamping groove penetrates through an inner wall surface of the cover towards the inner side of the outer shell, so that the first tab and the second tab are exposed in the inner cavity of the outer shell.

In some possible embodiments, the first tab and the second tab are located at the same end of the cell in the thickness direction of the battery.

In some possible embodiments, the extending direction of the first tab and the extending direction of the second tab have an included angle.

In some possible embodiments, the first connecting portion is annular, an outer edge of the first connecting portion is connected to the housing, and the first connecting portion is provided with a communication hole; the second connecting part is attached to the outer wall surface of the first connecting part, part of the second connecting part is exposed in the shell through the communication hole, and the clamping groove on the second connecting part is formed in the part of the second connecting part, which is exposed in the shell.

In some possible embodiments, the first connecting portion is provided with an avoiding groove, the avoiding groove corresponds to the clamping groove on the second connecting portion, and the avoiding groove is communicated with the inner side and the outer side of the first connecting portion; the lug connected to the first connecting portion and the avoiding groove are arranged at intervals.

In some possible embodiments, the cover is provided with a liquid injection hole for injecting electrolyte, the liquid injection hole is communicated with the inner side and the outer side of the shell, and the liquid injection hole and the clamping groove are arranged at intervals.

In some possible embodiments, the thicknesses of the first tab and the second tab are the same, and the extension of the clamping groove in the cover vertical direction is 1.1-2 times of the thickness of the first tab.

Compared with the prior art, the battery provided by the embodiment of the utility model has the following advantages:

the first lug is connected with the first output part in a clamping mode, the second lug is connected with the second output part, the first lug and the first output part can be fixed relatively, and the second lug and the second output part are fixed relatively. Therefore, in the welding process, the first lug can be prevented from deviating relative to the first output part, the second lug can be prevented from deviating relative to the second output part, and the situations of poor welding, short circuit and the like of the battery can be avoided.

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 described above, other technical problems solved by the 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 described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

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

fig. 2 is a schematic structural diagram of the battery cell in fig. 1;

fig. 3 is a schematic structural view of the cover in fig. 1 when the cover is connected with the tab;

FIG. 4 is a schematic view of the closure of FIG. 1;

FIG. 5 is an exploded view of the closure of FIG. 4;

FIG. 6 is a schematic structural diagram of the second connecting portion in FIG. 5;

fig. 7 is another schematic view of the closure of fig. 1.

Reference numerals:

10: a battery;

100: an electric core; 110: a first tab; 120: a second tab;

200: a housing; 201: a clamping groove;

210: a housing;

220: sealing the cover; 221: a first connection portion; 2211: a communicating hole; 222: a second connecting portion; 2221: a liquid injection hole; 2222: a projection;

230: an insulating member;

d: the thickness direction.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and 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 invention.

In the prior art, in the welding process of the tab and the output part, the welding equipment firstly presses the tab against the output part, and then the welding process is performed. However, misalignment between the tab and the output portion is likely to occur, and there is a possibility that poor welding, short circuit, or the like may occur between the tab and the output portion.

In view of this, the embodiment of the present application provides a battery, wherein the first output portion and the second output portion are respectively provided with a clamping groove, the first tab is clamped with the clamping groove of the first output portion, and the second tab is clamped with the clamping groove of the second output portion, so that when the tab is loaded on the sealing cover, the tab can be prevented from deviating from the sealing cover, and situations such as poor welding and short circuit between the tab and the output portion can be avoided.

Referring to fig. 1 to 7, the present embodiment provides a battery 10, which can be applied to terminal devices such as bluetooth headsets, watches, wristbands, hearing aids, VR (Virtual Reality) glasses, and the like.

The battery 10 includes a battery cell 100, and the battery cell 100 may have a winding structure (as shown in fig. 2) or a lamination structure (not shown). Taking the laminated structure as an example, the battery cell 100 includes a pole piece and a diaphragm, where the pole piece includes a positive pole piece and a negative pole piece, the positive pole piece, the negative pole piece and the diaphragm are all at least one, the positive pole piece and the negative pole piece are stacked in sequence, and the diaphragm is disposed between the positive pole piece and the negative pole piece to avoid mutual contact of the positive pole piece and the negative pole piece.

The material of the positive plate can be aluminum, aluminum alloy, titanium, stainless steel, nickel or alloy of the aluminum, the aluminum alloy, the titanium, the stainless steel and the nickel; the material of the negative plate can be copper, nickel, stainless steel, iron or the alloy of the copper, the nickel, the stainless steel and the iron; the material of the diaphragm may be polypropylene (PP), Polyethylene (PE), etc., which are well known to those skilled in the art.

It can be understood that both sides of the positive electrode sheet and both sides of the negative electrode sheet are coated with the active material. Taking a lithium ion battery as an example, the active materials on both sides of the positive plate can be lithium manganate, lithium cobaltate, lithium nickel cobalt manganate and the like. The active material on both sides of the negative electrode sheet may be graphite or carbon having a nearly graphite structure, or the like.

The battery cell 100 is provided with tabs, each tab includes a first tab 110 and a second tab 120, the first tab 110 is electrically connected to the positive plate, and the second tab 120 is electrically connected to the negative plate. The pole ear and the pole piece can be integrally formed, or the pole ear and the pole piece are connected in a welding mode.

The first tab 110 and the positive plate may be made of the same material, such as aluminum or aluminum alloy; the second tab 120 and the negative electrode sheet may be made of the same material, for example, nickel, stainless steel nickel plating, copper nickel plating, etc.

The width of the tab may be 2mm-4mm, the thickness may be 0.06mm-0.15mm, and the length of the tab may be set according to the size of the case 200, etc.

In some embodiments, the battery 10 further includes a casing 200, and the battery cell 100 is disposed inside the casing 200 to form a shield for the battery cell 100. And the housing 200 includes a first output portion and a second output portion, which can be understood as a positive electrode and a negative electrode of the battery, for being electrically connected with the terminal device, respectively, to supply power to the terminal device.

It is understood that the housing 200 is also filled with an electrolyte, which is an ion-transporting carrier for conducting ions between the positive and negative electrode tabs. The type of electrolyte may be set according to the type of battery 10, and this embodiment is not limited thereto.

For assembly, the casing 200 includes a casing 210 and a cover 220, the casing 210 has an accommodating cavity, the battery cell 100 and the electrolyte are located in the accommodating cavity of the casing 210, the casing 210 has an opening, the opening is located at one end of the casing 210 in the thickness direction D, and the cover 220 is used for closing the opening of the casing 210, so that the accommodating cavity may form a closed cavity.

In some embodiments, the first output portion is clamped to the first tab 110, so that the first tab 110 and the first output portion are relatively fixed, and the second output portion is clamped to the second tab 120, so that the second tab 120 and the second output portion are relatively fixed.

In this way, before the welding process of the tab and the welding portion, the first tab 110 is engaged with the first output portion to realize the relative fixation of the first tab 110 and the first output portion, and the second tab 120 is engaged with the second output portion to realize the relative fixation of the second tab 120 and the second output portion.

That is to say, in the welding process, when utmost point ear and closing cap material loading, the skew of relative output portion can not take place for utmost point ear, avoids leading to utmost point ear poor welding because of utmost point ear relative output portion skew, and then the situation such as battery 10 short circuit appears.

Wherein, the output part can be provided with a convex clamping column, and the corresponding pole ear is provided with a clamping hole which is spliced with the clamping column.

In some possible embodiments, for the convenience of assembly, the first output part and the second output part are both provided with a clamping groove 201, the first tab 110 is clamped and fixed in the clamping groove 201 on the first output part, so that the first tab 110 and the first output part are relatively fixed, and the second tab 120 is clamped and fixed in the clamping groove 201 on the second output part, so that the second tab 120 and the second output part are relatively fixed. That is, the tab is inserted into the engaging groove 201, and the outer wall surface of the tab abuts against the inner wall surface of the engaging groove 201, so that the tab and the output portion are fixed relative to each other.

In view of the small size of the battery 10, for ease of assembly, in some possible embodiments, the housing 200 may be a conductive material and may be composed of two parts, one of which constitutes the first output portion and the other of which constitutes the second output portion. Specifically, the cover 220 includes a first connection portion 221 and a second connection portion 222, i.e., the cover 220 is a split structure. And the first connection portion 221 is connected with the case 210 to constitute an output unit, one of the output unit and the second connection portion 222 constitutes a first output portion, and the other constitutes a second output portion. Illustratively, the output unit constitutes the second output portion, and the second connection portion 222 constitutes the first output portion. The first connection portion 221 and the housing 210 can be connected by welding, so that the sealing performance is good, and the connection strength is high.

The cover 220 is further provided with an insulating member 230, the insulating member 230 is sandwiched between the first connecting portion 221 and the second connecting portion 222, wherein the insulating member 230 may be made of Polyethylene (PE), polypropylene (PP), or the like, so as to prevent short circuit between the first connecting portion 221 and the second connecting portion 222.

Meanwhile, the second connection portion 222 is bonded and fixed to the first connection portion 221 through the insulating member 230 to form a closed accommodation cavity, so that leakage between the first connection portion 221 and the second connection portion 222 is avoided.

In some embodiments, in order to connect the tab to the output portion, the first connection portion 221 and the second connection portion 222 are provided with a clamping groove 201. That is, one of the two tabs is connected to the first connection portion 221 and the other is connected to the second connection portion 222.

Wherein, the clamping groove 201 can extend along the thickness direction D of the side wall of the housing 200. To facilitate the welding connection between the tab and the output portion, the clamping groove 201 extends along the inner wall surface of the cover 220, and the extending direction is perpendicular to the thickness direction D (as shown in fig. 7). Like this, the opening direction of joint groove 201 and the vertical of closing cap 220 have the contained angle (the vertical of closing cap 220 is parallel with thickness direction D), and first utmost point ear 110 stretches into in the joint groove 201 on the first output portion to make first utmost point ear 110 paste the dress on the internal face of first output portion, in second utmost point ear 120 stretches into the joint groove 201 on the second output portion, so that second utmost point ear 120 pastes the dress on the internal face of second output portion.

Thus, the arrangement of the parts in the housing 200 is simple and regular, and short circuits between the tabs, between the tabs and the output part and between the tabs and the pole piece are avoided.

The shape of the catching groove 201 may be adapted to the shape of the end of the tab, such as a polygon, an ellipse, a rectangle, a circle, etc. Wherein, the width of joint groove 201 is greater than the width of utmost point ear, and the extension size of joint groove 201 along thickness direction D (also be exactly the vertical of closing cap 220) is greater than the thickness of utmost point ear to utmost point ear and the grafting of joint groove 201 are exemplary, and the width of joint groove 201 can be 2.5mm-4.5mm, and the difference between the width of joint groove 201 and the utmost point ear width is less, and it is great to avoid the relative displacement volume between utmost point ear and the joint groove 201.

In some embodiments, the first tab 110 and the second tab 120 have the same thickness, and the extension of the snap groove 201 in the vertical direction of the cover 220 is 1.1 times to 2 times the thickness of the first tab 110. That is, when the tab has a thickness of 0.06mm to 0.15mm, the depth of the engaging groove along the vertical direction of the cap 220 may be 0.07mm to 0.3 mm.

In some possible embodiments, the clamping groove 201 penetrates through the inner wall surface of the cover 220 towards the inner side of the housing 200, that is, the clamping groove 201 may be a recessed structure formed on the inner wall surface of the housing 200, and the structure is relatively simple, so that after the tab extends into the clamping groove 201, the first tab 110 and the second tab 120 may be exposed in the inner cavity of the housing 200, so as to facilitate the welding connection between the tab and the output portion.

When the welding equipment is used for welding, the welding equipment is used for welding the end parts of the lugs on the clamping groove 201, and the welding penetration is smaller than the thickness of the output part, for example, the thickness can be 0.08mm-0.2 mm. The welding tension between the pole lug and the output part is greater than or equal to 5N, and the welding track can be a point, a circle, a polygon, a spiral line, an arc line and the like. The sum of the protrusion height (e.g. 0.02mm-0.1mm) of the welding spot protruding out of the tab and the thickness of the tab can be smaller than the recess depth of the clamping groove 201, so as to avoid short circuit caused by contact of the welding spot with other parts.

It is understood that the first tab 110 and the second tab 120 may be respectively located at two ends (not shown) of the battery cell 100 along the thickness direction D to avoid a short-circuit contact condition between the first tab 110 and the second tab 120. Accordingly, the first output portion and the second output portion are respectively located at both ends of the case 200 in the thickness direction D,

in some possible embodiments, the first tab 110 and the second tab 120 are located at the same end of the battery cell 100 in the thickness direction D of the battery 10 (as shown in fig. 2). Compared with the embodiment that the first tab 110 and the second tab 120 are respectively disposed at two ends of the battery cell 100, in the embodiment, by respectively disposing the first tab 110 and the second tab 120 at the same end of the battery cell 100, the thickness space occupied by the tabs in the casing 200 can be reduced, the height of the battery cell 100 in the casing 200 can be increased, the capacity and the energy density of the battery 10 can be improved, and the cruising ability of the battery 10 can be improved.

Meanwhile, for the embodiment in which the first tab 110 and the second tab 120 are respectively disposed at two ends of the battery cell 100, the first tab 110 and the second tab 120 are respectively disposed at the same end of the battery cell 100, and in the tab and output part welding process, the first tab 110 and the first output part and the second tab 120 and the second output part can be welded by using the same welding device, so that the first tab 110 and the first output part and the second tab 120 and the second output part are prevented from being welded by different welding devices, the welding process is optimized, the mechanical action of the welding device is reduced, the welding cost is reduced, and the assembly efficiency of the battery 10 is improved.

Referring to fig. 3 to 6, in some possible embodiments, in order to avoid a short circuit between the first tab 110 and the second tab 120, the first tab 110 and the second tab 120 are arranged in a staggered manner in the circumferential direction of the battery 10, and the two corresponding clamping grooves 201 are staggered in the circumferential direction of the battery cell 100. That is, the extending direction of the first tab 110 and the extending direction of the second tab 120 have an included angle, which may be any size, as long as the projections of the first tab 110 and the second tab 120 on the cap 220 do not overlap, for example, the included angle is 10 ° to 180 °, so as to prevent the first tab 110 and the second tab 120 from contacting each other, which may result in short circuit of the battery 10.

Meanwhile, the first tab 110 and the second tab 120 are arranged in a staggered manner, so that the thickness space occupied by the tabs in the thickness direction D can be reduced, the capacity and the energy density of the battery 10 can be improved, and the cruising ability of the battery 10 can be improved.

For the cover 220, the first connection portion 221 may be in a sheet shape, and the cover 220 is disposed at an opening of the receiving cavity. The second connection portion 222 is attached to the inner wall surface of the first connection portion 221, and the area of the second connection portion 222 is smaller than that of the first connection portion 221, so that part of the first connection portion 221 is exposed in the receiving cavity and connected with the tab.

In some possible embodiments, the first connection portion 221 has a ring shape, such as a circular ring shape, an outer edge of the first connection portion 221 is connected to the housing 210, and the communication hole 2211 is formed on the first connection portion 221. Wherein the second connection portion 222 is attached to the outer wall surface of the first connection portion 221, a portion of the second connection portion 222 is exposed to the inside of the housing 200 through the communication hole 2211, and the engaging groove 201 of the second connection portion 222 is formed at a portion of the second connection portion 222 exposed to the inside of the housing 200 to connect with the tab. At this time, the insulating member 230 is in a sheet shape and interposed between the first connection portion 221 and the second connection portion 222 to prevent the first connection portion 221 and the second connection portion 222 from contacting. The thickness of the insulating member 230 may be 0.04mm to 0.15 mm.

In this case, the communication hole 2211 may be a rectangular hole, a circular hole, or the like, and the inner diameter of the communication hole 2211 may be half the diameter of the cap 220.

The second connection portion 222 may have an outer diameter smaller than that of the battery 10. In some embodiments, the outer diameter of the second connection portion 222 may be comparable to the outer diameter of the battery 10, so as to avoid a step structure formed on the outer wall surface of the battery 10, and simplify the appearance of the battery 10.

In some embodiments, in order to facilitate the connection of the tab to the second connection portion 222, the portion of the second connection portion 222 exposed in the housing 200 may be provided with a projection 2222, the projection 2222 extends into the communication hole 2211, an end surface of the projection 2222 may be flush with an inner wall surface of the first connection portion 221, and the catching groove 201 is provided on the projection 2222.

It can be understood that, when the first connection portion 221 is annular and is connected to the casing 210 to form the second output portion, a part of the first tab 110 is attached to a side wall surface of the first connection portion 221 facing the battery cell 100 (as shown in fig. 3).

In some possible embodiments, the first connection portion 221 is provided with a avoiding groove (not shown) corresponding to the clamping groove 201 of the second connection portion 222, and the avoiding groove communicates the inner side and the outer side of the first connection portion 221. The width of the avoiding groove is greater than the width of the tab, and the depth of the avoiding groove may be less than or equal to the thickness of the first connecting portion 221 and greater than the thickness of the tab, so as to prevent the first connecting portion 221 from contacting the tab connected to the second connecting portion 222.

At this time, the tab connected to the first connection portion 221 and the relief groove are spaced apart from each other, so that the first tab 110 and the second tab 120 are separated from each other, and the first tab 110 and the second tab 120 are prevented from contacting each other and being short-circuited.

In some possible embodiments, a liquid filling hole 2221 for filling the electrolyte is formed on the cover 220, for example, the liquid filling hole 2221 is formed on the second connection portion 222 and is provided at a position corresponding to the communication hole 2211, so as to avoid opening a hole on the first connection portion 221 at the same time. The injection hole 2221 communicates with the inside and outside of the case 200, so that after the case 200 and the battery cell 100 are assembled, the electrolyte can be injected into the case 200 through the injection hole 2221. After the electrolyte injection is completed, the injection hole 2221 may be closed.

The injection hole 2221 may be a rectangular hole, a circular hole, or the like, and the size of the injection hole 2221 may be set as needed, for example, the injection hole 2221 is a circular hole, and the diameter of the injection hole 2221 may be 1mm to 2 mm.

Wherein, the liquid injection hole 2221 and the clamping groove 201 are arranged at intervals. Like this, after utmost point ear passed through joint groove 201 and output part joint, utmost point ear can not lead to sheltering from to annotate liquid hole 2221 department by the skew of closing cap 220 relatively to avoid utmost point ear to influence and inject into electrolyte.

The distance between the injection hole 2221 and the catching groove 201 may be set according to the size of the battery 10, the size of the catching groove 201, and the like. For example, the spacing may be 2mm to 4 mm.

In some possible embodiments, the outer sides of the first tab 110 and the second tab 120 are coated with tab glue layers, the tab glue layers are coated on the outer wall surfaces of the tabs except for the portion welded with the output portion, and the material of the tab glue layers may be Polyethylene (PE), polypropylene (PP), or the like.

The utmost point ear glue film can form the protection to utmost point ear, avoids utmost point ear to receive the collision damage, improves the life of utmost point ear. Meanwhile, the tab glue layer has insulativity, so that the tab can be prevented from being electrically connected with other parts, for example, the short circuit connection between two tabs, between the tab and an output part and between the tab and a pole piece is avoided.

It can be understood that, when the first connection portion 221 is annular and is connected to the casing 210 to form the second output portion, a portion of the first tab 110 is attached to a side wall surface of the first connection portion 221 facing the battery cell 100, and a tab glue layer is provided to prevent the first tab 110 from contacting the first connection portion 221 to cause a short circuit.

In some embodiments, the assembly process for battery 10 is as follows:

molding the battery core 100;

respectively extending the first tab 110 and the second tab 120 into the two inserting grooves;

respectively pressing the first tab 110 and the second tab 120 on the sealing cover 220 by using a positioning fixture on the welding equipment;

respectively welding the first tab 110 and the second tab 120 by using the welding equipment; it is understood that the present embodiment does not limit the sequence of the first tab 110 and the second tab 120;

bending the tab, so that the end surface of the seal cover 220 in the thickness direction D is substantially parallel to the end surface of the battery cell 100;

extending the battery cell 100 into the casing 210, and welding the sealing cover 220 and the casing 210;

injecting electrolyte and sealing the injection hole 2221;

performing an air tightness test on the cell 10, wherein the leak rate of the helium test tightness test of the cell 10 is less than 1.0 × e^- ⁶mbar.L/s。

It can be understood that, when the tab is welded to the cover 220, the tab may also be in a bent state, where the cover 220 is substantially parallel to the end surface of the battery cell 100.

In the present specification, each embodiment or implementation mode is described in a progressive manner, and the emphasis of each embodiment is on the difference from other embodiments, and the same and similar parts between the embodiments may be referred to each other.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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 utility model 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 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 invention.

Claims

1. A battery, comprising:

the battery cell is provided with tabs, and the tabs comprise a first tab and a second tab;

the shell, electric core sets up in the shell, the shell includes first output portion and second output portion, first output portion with all be equipped with the joint groove on the second output portion, first utmost point ear joint is fixed on the first output portion the joint inslot, second utmost point ear joint is fixed on the second output portion the joint inslot.

2. The battery of claim 1, wherein the housing comprises:

a housing, the cell being located within the housing, the housing having an opening;

the sealing cover is used for sealing the opening of the shell and comprises a first connecting part and a second connecting part, and the first connecting part and the second connecting part are both provided with the clamping grooves;

an insulating member interposed between the first connection portion and the second connection portion;

the first connecting portion is connected with the shell to form an output unit, one of the output unit and the second connecting portion forms the first output portion, and the other forms the second output portion.

3. The battery of claim 2, wherein the clamping groove extends along an inner wall surface of the sealing cover, an included angle is formed between an opening direction of the clamping groove and a vertical direction of the sealing cover, the first tab extends into the clamping groove on the first output portion, so that the first tab is attached to the inner wall surface of the first output portion, and the second tab extends into the clamping groove on the second output portion, so that the second tab is attached to the inner wall surface of the second output portion.

4. The battery of claim 2, wherein the snap groove penetrates an inner wall surface of the cover toward an inner side of the case so that both the first tab and the second tab are exposed in the inner cavity of the case.

5. The battery of any of claims 1-4, wherein the first tab and the second tab are located at a same end of the cell in a thickness direction of the battery.

6. The battery of claim 5, wherein the direction of extension of the first tab and the direction of extension of the second tab have an included angle.

7. The battery according to any one of claims 2 to 4, wherein the first connecting portion has a ring shape, an outer edge of the first connecting portion is connected to the case, and a communication hole is provided in the first connecting portion;

the second connecting part is attached to the outer wall surface of the first connecting part, part of the second connecting part is exposed in the shell through the communication hole, and the clamping groove on the second connecting part is formed in the part of the second connecting part, which is exposed in the shell.

8. The battery according to claim 7, wherein an avoiding groove is formed in the first connecting portion, the avoiding groove corresponds to the clamping groove in the second connecting portion, and the avoiding groove communicates with the inner side and the outer side of the first connecting portion;

the lug connected to the first connecting portion and the avoiding groove are arranged at intervals.

9. The battery of claim 7, wherein the cover is provided with a liquid injection hole for injecting the electrolyte, the liquid injection hole is communicated with the inner side and the outer side of the shell, and the liquid injection hole is spaced from the clamping groove.

10. The battery as set forth in any one of claims 2 to 4, wherein the first tab and the second tab have the same thickness, and the extension of the snap groove in the cover vertical direction is 1.1 to 2 times the thickness of the first tab.