CN213782208U - Battery and battery module with same - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery and have its battery module. The battery comprises a cover plate, a first electrode terminal, a battery cell and a first insulating piece, wherein the first electrode terminal is arranged on the cover plate; the battery cell comprises a battery cell main body and a first tab extending from the top surface of the battery cell main body, the first tab is electrically connected with a first electrode terminal after being bent, and a first bent part is formed at the bent part of the first tab; the first insulating part comprises an insulating main body and a side edge, the insulating main body is positioned between the cover plate and the battery core, and the side edge extends out from the outer edge of part of the insulating main body in the length direction to one side far away from the cover plate; the lateral edge is opposite to the first bending part so as to limit the first bending part at the inner side of the lateral edge. Through making lateral margin and the relative setting of first kink on the insulating main part to can be with the spacing inboard in lateral margin of first kink, with this first kink emergence position change of avoiding.

Description

Battery and battery module with same

Technical Field

The utility model relates to a battery technology field especially relates to a battery and have its battery module.

Background

In the battery in the related art, when the tab of the battery cell is connected with the electrode terminal of the cover plate assembly, the tab needs to be bent, and in the connection or use process, the bent part of the tab can be close to the battery shell, so that the phenomenon of overlapping the battery shell easily occurs, and the risk of short circuit inside the battery is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery and have its battery module to the realization is to the position restriction of utmost point ear.

According to a first aspect of the present invention, there is provided a battery, comprising:

a cover plate;

a first electrode terminal disposed on the cap plate;

the battery comprises a battery cell, wherein the battery cell comprises a battery cell main body and a first tab extending from the top surface of the battery cell main body, the first tab is electrically connected with a first electrode terminal after being bent, and a first bent part is formed at the bent part of the first tab;

the first insulating part comprises an insulating main body and a side edge, the insulating main body is positioned between the cover plate and the battery cell, and the side edge extends out from the outer edge of the insulating main body in the length direction to one side far away from the cover plate;

the lateral edge is opposite to the first bending part so as to limit the first bending part at the inner side of the lateral edge.

The utility model discloses a battery is including apron, first electrode terminal, electric core and first insulating part, and the first utmost point ear of electric core is connected with first electrode terminal electricity, and the department of buckling of first utmost point ear is formed with first kink. Through making lateral margin and the relative setting of first kink on the insulating main part to can be with the spacing inboard in lateral margin of first kink, with this first kink emergence position change of avoiding.

According to a second aspect of the present invention, there is provided a battery module comprising the above battery.

The utility model discloses a battery module, the first utmost point ear of electricity core is connected with first electrode terminal electricity, and the second utmost point ear of electricity core is connected with second electrode terminal electricity, and the department of buckling of first utmost point ear is formed with first kink. Through making lateral margin and the relative setting of first kink on the insulating main part to can be with the spacing inboard in lateral margin of first kink, with this first kink emergence position change of avoiding.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic diagram illustrating a cross-sectional configuration of a battery according to an exemplary embodiment;

fig. 4 is a schematic diagram illustrating a partial structure of a cell according to an exemplary embodiment;

FIG. 5 is an exploded view of a cover plate assembly of a battery according to an exemplary embodiment;

fig. 6 is an assembly structure view illustrating a cap plate assembly of a battery according to an exemplary embodiment.

The reference numerals are explained below:

10. a cover plate; 11. a first mounting hole; 12. a second mounting hole; 13. a third mounting hole; 20. a first electrode terminal; 201. a first pole column; 202. a first riveting block; 21. a second electrode terminal; 211. a second pole; 212. a second riveting block; 30. an electric core; 31. a cell main body; 32. a first tab; 321. a first bent portion; 322. a first connection portion; 323. a second connecting portion; 33. a second tab; 331. a second bent portion; 332. a third connecting portion; 333. a fourth connecting portion; 40. a first insulating member; 41. an insulating body; 42. a skirt; 421. a first side edge; 422. a second lateral edge; 43. a fourth mounting hole; 44. a fifth mounting hole; 50. a housing; 60. a second insulating member; 70. a third insulating member; 80. an explosion-proof valve; 90. And (4) protecting the sheet.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 6, the battery includes: a cover plate 10; a first electrode terminal 20, the first electrode terminal 20 being disposed on the cap plate 10; the battery cell 30 comprises a battery cell main body 31 and a first tab 32 extending from the top surface of the battery cell main body 31, the first tab 32 is bent and then electrically connected with the first electrode terminal 20, and a first bent part 321 is formed at the bent part of the first tab 32; the first insulating part 40, the first insulating part 40 includes an insulating main body 41 and a side edge 42, the insulating main body 41 is located between the cover plate 10 and the battery core 30, and the side edge 42 extends from a part of the outer edge of the insulating main body 41 in the length direction toward the side far away from the cover plate 10; the side edge 42 is disposed opposite to the first bending portion 321, so that the first bending portion 321 is limited inside the side edge 42.

The battery of an embodiment of the present invention includes a cover plate 10, a first electrode terminal 20, a battery cell 30 and a first insulating member 40, wherein a first tab 32 of the battery cell 30 is electrically connected to the first electrode terminal 20, and a bending portion of the first tab 32 is formed with a first bending portion 321. By arranging the side edge 42 of the insulating main body 41 opposite to the first bent portion 321, the first bent portion 321 can be limited inside the side edge 42, so as to avoid the position change of the first bent portion 321.

It should be noted that the battery cell 30 is a top tab battery cell, that is, the first tab 32 is a first bending piece in a use state. When the first tab 32 on the cell main body 31 is in an original state, the extending direction of the first tab 32 is the same as the extending direction of the cell main body 31, that is, after the first tab 32 is straightened, the first tab 32 is perpendicular to the surface where the first tab 32 is connected with the cell main body 31. In order to facilitate connection between the first tab 32 and the first electrode terminal 20, the first tab 32 needs to be bent, that is, a first bent part is formed, and at this time, a first bent part 321 is formed at the bent part of the first tab 32. During the use, the position of the first tab 32 is not necessarily changed, and if there is no limitation of the side edge 42, the first bent part 321 may exceed the side edge of the insulating main body 41, and thus may contact other structures of the battery, and if it contacts the conductor, a safety problem such as a short circuit may be caused. In the present embodiment, the side edge 42 is disposed on the insulating main body 41, so that the first bending portion 321 is ensured not to exceed the side edge of the insulating main body 41. The inner side of the side edge 42 is the side of the side edge 42 facing the first tab 32, and further, the inner side of the side edge 42 is the side of the side edge 42 facing away from the case 50.

It should be noted that the side edge 42 extends from a part of the outer edge of the insulating main body 41 in the longitudinal direction toward the side away from the cover plate 10, and it is understood that the side edge 42 is disposed on the insulating main body 41 and extends toward the side away from the cover plate 10, and the side edge 42 occupies a part of the outer edge of the insulating main body 41 in the longitudinal direction. I.e. the length of the side edge 42 is smaller than the circumference of the outer edge of the insulating main body 41, and further, the side edge 42 is located at the outer edge of one side of the insulating main body 41, and the length of the side edge 42 is smaller than the length of the outer edge of the corresponding side. For example, the length of the side edge 42 may be smaller than the length of the first bent portion 321, that is, the side edge 42 blocks part of the first bent portion 321, or the length of the side edge 42 may be equal to the length of the first bent portion 321, that is, the side edge 42 may block just all of the first bent portion 321, or the length of the side edge 42 may be larger than the length of the first bent portion 321, that is, the side edge 42 may block all of the first bent portion 321. Of course, when the length of the side edge 42 is equal to or greater than the length of the first bent portion 321, the first bent portion 321 where the side edge 42 covers the portion is not excluded, and may be adjusted according to the actual design position.

Further, the length of the side edge 42 is smaller than the length of the insulating body 41.

It should be noted that the first tab 32 is electrically connected to the first electrode terminal 20, i.e., the first tab 32 and the first electrode terminal 20 may be directly connected, for example, by welding to connect the first tab 32 and the first electrode terminal 20 together. Alternatively, the first tab 32 and the first electrode terminal 20 may be connected by a connecting piece, for example, the first tab 32 is welded to one side of the connecting piece, and the first electrode terminal 20 is welded to the other side of the connecting piece.

Further, as shown in fig. 3, the battery further includes a second electrode terminal 21, the second electrode terminal 21 is disposed on the cover plate 10, the battery cell 30 further includes a second tab 33 extending from the top surface of the cell main body 31, and the second tab 33 is bent and then electrically connected to the second electrode terminal 21. Accordingly, the electrical connection between the second tab 33 and the second electrode terminal 21 may also be performed in the manner described above, and will not be described herein.

In some embodiments, the first tab 32 is disposed opposite to the first electrode terminal 20, i.e., the perpendicular projection of the first tab 32 and the first electrode terminal 20 on the same plane at least partially coincide, and the side edge 42 may block the lower portion of the first electrode terminal 20.

In some embodiments, the perpendicular projections of the first tab 32 and the first electrode terminal 20 on the same plane do not coincide, but the first tab and the first electrode terminal can be connected by a connecting piece, and in this case, the side edge 42 can completely shield the lower portion of the first electrode terminal 20.

In one embodiment, as shown in fig. 5 and 6, the cap plate assembly includes a cap plate 10, a first electrode terminal 20, a second electrode terminal 21, and a first insulating member 40, and the battery may include one battery cell 30, that is, one battery cell 30 corresponds to one cap plate assembly. In this case, one first tab 32 is connected to one first electrode terminal 20, and therefore, the insulating main body 41 may be provided with one side edge 42, that is, the side edge 42 may correspond to the first bent portion 321. Alternatively, the insulating main body 41 may be provided with a pair of side edges 42, and the two side edges 42 are disposed oppositely, that is, one side edge 42 corresponds to the first bent portion 321, and the other side edge 42 corresponds to the free end of the first tab 32.

In one embodiment, the cap plate assembly includes the cap plate 10, the first electrode terminal 20, the second electrode terminal 21, and the first insulating member 40, and the battery may include two battery cells 30, that is, two battery cells 30 correspond to one cap plate assembly. At this time, the two first tabs 32 of the two battery cells 30 are connected to one first electrode terminal 20, so that the insulating main body 41 may be provided with a pair of side edges 42, and the two side edges 42 are disposed oppositely, that is, one side edge 42 corresponds to the first bent portion 321 of one first tab 32, and the other side edge 42 corresponds to the first bent portion 321 of the other first tab 32.

In one embodiment, as shown in fig. 4, the first tab 32 includes: a first connection portion 322, where the first connection portion 322 extends from the top surface of the cell main body 31; a second connection part 323, wherein the second connection part 323 is electrically connected to the first electrode terminal 20, and the second connection part 323 is connected to the first connection part 322 in a bent manner to form a first bent part 321; at least part of the projection of the first bent portion 321 toward the plane where the inner side surface of the side edge 42 is located on the inner side surface of the side edge 42, so as to ensure that the side edge 42 forms a limit for the first bent portion 321.

Specifically, as shown in fig. 4, the first tab 32 is bent to form a first connection portion 322, a first bent portion 321, and a second connection portion 323. The cell main body 31 has two opposite large surfaces, that is, a first large surface and a second large surface, when the first tab 32 is in the straightened state, the distance between the first tab 32 and the first large surface is smaller than the distance between the first tab 32 and the second large surface, at this time, the first tab 32 is bent toward the second large surface, so that a first bent portion 321 is formed, and the lateral edge 42 on the insulating main body 41 is close to the first large surface, so that the first bent portion 321 is limited, as shown in fig. 2.

As for the contact area between the side edge 42 and the first bent portion 321, that is, the opposing relationship between the side edge 42 and the first bent portion 321, the side edge 42 may be opposite to a part of the first bent portion 321, or the side edge 42 may be opposite to the whole of the first bent portion 321, that is, the first bent portion 321 can be kept in a limited position, which is not limited herein.

In some embodiments, the length of the side edge 42 may be equal to the length of the first bent portion 321, i.e., the side edge 42 and the first bent portion 321 may be exactly overlapped and opposite, or may be in a staggered correspondence.

In some embodiments, the length of the side edge 42 may be less than the length of the first bend 321.

In some embodiments, the length of the side edge 42 may be greater than the length of the first bend 321. For example, the length of the side edge 42 may be equal to the length of the insulating body 41.

In one embodiment, as shown in fig. 1 and 2, the battery further includes: the battery cell 30 is positioned in the casing 50, and the cover plate 10 is connected with the casing 50; the side edge 42 is located between the first bent portion 321 and the housing 50, and the side edge 42 separates the first bent portion 321 from the housing 50, so as to prevent the first bent portion 321 and the housing 50 from forming an electrical connection.

Specifically, as shown in fig. 2, the battery cell 30 and the first insulating member 40 may be accommodated in the casing 50, and the cover plate 10 may be located outside the casing 50, or the cover plate 10 may be accommodated in the casing 50. The lateral edge 42 is located between the first bending portion 321 and the casing 50, so as to separate the first bending portion 321 from the casing 50, even if the position of the battery cell 30 relative to the casing 50 changes, the first bending portion 321 and the casing 50 do not directly contact with each other due to the limiting function of the lateral edge 42, so as to avoid the electrical connection therebetween.

In one embodiment, a side of the side edge 42 away from the first bent portion 321 abuts against the housing 50, that is, one side of the side edge 42 is opposite to the first bent portion 321, and the other side abuts directly against the housing 50, so as to limit the position of the first insulating member 40 and prevent the first insulating member 40 from changing position. In practical use, the first insulating part 40 and the cover plate 10 are assembled together to form a cover plate assembly, the cover plate assembly is placed on the shell 50 to be welded after the cover plate assembly is placed on the shell 50, the first insulating part 40 is abutted to the shell 50, the fixing effect can be achieved in the welding of the cover plate assembly and the shell 50, an external fixing device is not needed, the welding of the cover plate assembly and the shell 50 can be directly achieved, the process is simplified, and the cost is reduced.

In one embodiment, the side edges 42 have a height in a first direction perpendicular to the insulating body 41 of 1mm to 5 mm. The first direction can be understood as a vertical direction, that is, the height of the lateral edge 42 needs to ensure that the first bending part 321 can be limited, and does not need to be higher than the first bending part 321 so much, thereby avoiding increasing the overall height of the battery.

In one embodiment, the side edge 42 has a thickness of 0.3mm to 2.5mm in a second direction parallel to the insulating body 41. The second direction may be understood as a horizontal direction, i.e., the thickness of the side edge 42, in order to ensure stability, and not to occupy space of the insulating main body 41 or space of the case 50, thereby minimizing the size of the battery.

In some embodiments, the height of the skirt 42 in a first direction perpendicular to the insulating body 41 is 3mm to 3.5 mm; and/or the side edge 42 has a thickness of 0.7mm to 1.5mm in a second direction, the second direction being parallel to the insulating body 41.

It should be noted that the first direction corresponds to a vertical direction, and the second direction corresponds to a horizontal direction, in this case, reference is made that the insulating main body 41 is parallel to a horizontal plane. The height and thickness of the skirt 42 has an effect on the performance of the cell. When the height of the side edge 42 is less than 1mm, the side edge 42 has a weak limit stop function on the bending part of the tab due to the small height, and a part of the tab may pass through the lower part of the side edge 42 and overlap with the shell; when the height of the lateral edge 42 is greater than 5mm, the lateral edge 42 partially contacts the battery core due to the excessive height and is even inserted into the battery core, so that the battery core is damaged, and in order to better limit and stop the bent part of the tab and avoid damaging the battery, the preferred scheme is that the height of the lateral edge 42 along the first direction is 3mm-3.5 mm. When the thickness of the side edge 42 is less than 0.3mm, the side edge 42 has a weak limiting and stopping effect on the bent part of the tab due to the excessively small thickness, and a part of the tab may be pressed and bent to overlap with the shell; when lateral margin 42 thickness is greater than 2.5mm, lateral margin 42 can partially oppress utmost point ear kink because of thickness is too big, causes the deformation of utmost point ear kink even to damage, and the too big holistic weight that can increase the battery simultaneously is unfavorable for battery energy density's promotion, for the better spacing backstop to utmost point ear kink, avoids damaging utmost point ear kink simultaneously, and preferred scheme is that lateral margin 42 is 0.7mm-1.5mm along the thickness of second direction.

In one embodiment, the insulating body 41 and the side edge 42 are of an integral structure, which not only has high structural stability, but also can improve the molding efficiency.

It should be noted that the integrated structure herein may be an integrated structure, and does not exclude the subsequent connection after being formed independently. The insulating main body 41 and the side edge 42 are of an integrally formed structure, and the insulating main body 41 and the side edge 42 can be formed through one-step injection molding, so that the process is simple and the cost is low.

In one embodiment, the first insulating member 40 is made of an insulating material, such as rubber, plastic, Polypropylene (PP), or the like.

In one embodiment, the side edge 42 may be a plate, such as a rectangular plate, an inverted trapezoidal plate, etc., which is not limited herein and can be adjusted according to actual requirements. The circumferential outer edges of the skirt 42 may each be an arcuate smooth transition.

In one embodiment, the insulating body 41 and the side edge 42 are separate two pieces, the insulating body 41 and the side edge 42 are connected, the insulating body 41 and the side edge 42 may be fixedly connected, or the insulating body 41 and the side edge 42 may be detachably connected.

In one embodiment, as shown in fig. 4, the second tab 33 is a second bending piece, and a second bending portion 331 is formed at the bending position of the second tab 33; the side edge 42 includes a first side edge 421 and a second side edge 422, the first side edge 421 and the second side edge 422 are disposed at an interval, the first side edge 421 is disposed opposite to the first bending portion 321, and the second side edge 422 is disposed opposite to the second bending portion 331, so as to limit the second bending portion 331 at the inner side of the second side edge 422.

Specifically, as shown in fig. 5 and 6, the side edge 42 is composed of a first side edge 421 and a second side edge 422, and considering that the first tab 32 and the second tab 33 are arranged at an interval, the first side edge 421 and the second side edge 422 are arranged at an interval, and the first side edge 421 forms a limit for the first bending portion 321, and the second side edge 422 forms a limit for the second bending portion 331, so as to ensure that neither the first tab 32 nor the second tab 33 is electrically connected to the housing 50.

It should be noted that, the first side edge 421 and the second side edge 422 are arranged at an interval, so that the overall weight of the first insulating member 40 can be reduced, and the first side edge 421 and the second side edge 422 are purposefully limited with the first folding portion 321 and the second folding portion 331.

In one embodiment, the second tab 33 is a second bending part, and a second bending part 331 is formed at the bending part of the second tab 33; the side edge 42 is opposite to the second bending portion 331, so that the second bending portion 331 is limited inside the side edge 42.

Specifically, the side edge 42 realizes the limitation of the first bending portion 321 and the second bending portion 331, that is, the side edge 42 is composed of a first side edge 421 and a second side edge 422, and the side edge 42 in this embodiment is an integral body, so as to realize the limitation of the first tab 32 and the second tab 33, and ensure that neither the first tab 32 nor the second tab 33 forms an electrical connection with the housing 50. The housing 50 may be an aluminum case.

In one embodiment, the second tab 33 includes a third connection part 332 and a fourth connection part 333, the third connection part 332 is connected to the cell main body 31, the fourth connection part 333 is electrically connected to the first electrode terminal 20, the fourth connection part 333 is connected to the third connection part 332 through the second bending part 331, and the fourth connection part 333 is inclined to the third connection part 332.

It should be noted that, for the specific formation and description of the second tab 33, reference may be made to the first tab 32, and details are not described here.

In one embodiment, the first electrode terminal 20 and the second electrode terminal 21 are opposite in polarity, i.e., one is a positive terminal and the other is a negative terminal.

Referring to fig. 5, the cover plate 10 is provided with a first mounting hole 11 and a second mounting hole 12, the first electrode terminal 20 includes a first electrode post 201 and a first riveting block 202, the first electrode post 201 is connected to the first riveting block 202, the first electrode post 201 is inserted into the first mounting hole 11, and the first riveting block 202 is located above the cover plate 10. The second electrode terminal 21 includes a second pole 211 and a second riveting block 212, the second pole 211 is connected to the second riveting block 212, the second pole 211 is inserted into the second mounting hole 12, and the second riveting block 212 is located above the cover plate 10.

The first insulating part 40 is provided with a fourth mounting hole 43 and a fifth mounting hole 44, the first mounting hole 11 and the fourth mounting hole 43 are arranged oppositely, the second mounting hole 12 and the fifth mounting hole 44 are arranged oppositely, the first pole column 201 sequentially penetrates through the fourth mounting hole 43 and the first mounting hole 11, and the second pole column 211 sequentially penetrates through the fifth mounting hole 44 and the second mounting hole 12.

In some embodiments, a second insulator 60 is disposed between the first riveting block 202 and the cover plate 10, and between the second riveting block 212 and the cover plate 10. The second insulator 60 may be made of plastic, and the first insulator 40 may also be made of plastic.

In some embodiments, a third insulating member 70 is disposed between the first pole post 201 and the cover plate 10, and between the second pole post 211 and the cover plate 10. Wherein the third insulator 70 may be a sealing ring.

Referring to fig. 5, a third mounting hole 13 is formed in the cover plate 10, the explosion-proof valve 80 is disposed in the third mounting hole 13, and a protective sheet 90 is disposed at a port of the third mounting hole 13. Wherein the explosion-proof valve 80 may be welded to the cover plate 10.

An embodiment of the utility model also provides a battery module, including foretell battery.

The utility model discloses a battery module of an embodiment, the first utmost point ear 32 of electricity core 30 is connected with first electrode terminal 20 electricity, and the second utmost point ear 33 of electricity core 30 is connected with second electrode terminal 21 electricity, and the department of buckling of first utmost point ear 32 is formed with first kink 321. By arranging the side edge 42 of the insulating main body 41 opposite to the first bent portion 321, the first bent portion 321 can be limited inside the side edge 42, so as to avoid the position change of the first bent portion 321.

In one embodiment, the battery module includes a plurality of batteries, which are sequentially spliced. The spliced battery can be accommodated in the box body.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery, comprising:

a cover plate (10);

a first electrode terminal (20), the first electrode terminal (20) being disposed on the cap plate (10);

the battery cell (30) comprises a battery cell main body (31) and a first tab (32) extending from the top surface of the battery cell main body (31), the first tab (32) is bent and then electrically connected with the first electrode terminal (20), and a first bent part (321) is formed at the bent part of the first tab (32);

the first insulating piece (40), the first insulating piece (40) comprises an insulating main body (41) and a side edge (42), the insulating main body (41) is positioned between the cover plate (10) and the battery cell (30), and the side edge (42) extends from part of the outer edge of the insulating main body (41) in the length direction to one side far away from the cover plate (10);

the side edge (42) and the first bent part (321) are arranged oppositely, so that the first bent part (321) is limited at the inner side of the side edge (42).

2. The battery of claim 1, wherein the first tab (32) comprises:

a first connecting portion (322), wherein the first connecting portion (322) extends from the top surface of the cell main body (31);

a second connection part (323), the second connection part (323) being electrically connected to the first electrode terminal (20), the second connection part (323) being bent and connected to the first connection part (322) to form the first bent part (321);

wherein, the projection of the first bending part (321) towards the plane of the inner side surface of the side edge (42) is at least partially positioned on the inner side surface of the side edge (42).

3. The battery of claim 1, further comprising:

a housing (50), wherein the battery cell (30) is located in the housing (50), and the cover plate (10) is connected with the housing (50);

wherein the side edge (42) is located between the first bent portion (321) and the housing (50).

4. The battery according to claim 3, characterized in that the side of the lateral edge (42) remote from the first fold (321) abuts against the housing (50).

5. The battery according to claim 1, characterized in that the lateral edge (42) has a height of 1mm-5mm in a first direction, which is perpendicular to the insulating body (41);

and/or the lateral edge (42) has a thickness of 0.3mm to 2.5mm in a second direction, the second direction being parallel to the insulating body (41).

6. The battery according to claim 1, characterized in that the lateral edge (42) has a height of 3mm-3.5mm in a first direction, which is perpendicular to the insulating body (41);

and/or the lateral edge (42) has a thickness of 0.7mm to 1.5mm in a second direction, the second direction being parallel to the insulating body (41).

7. The battery according to claim 1, characterized in that the insulating body (41) and the lateral edge (42) are of one-piece construction.

8. The battery according to any one of claims 1 to 7, wherein the battery further comprises a second electrode terminal (21), the second electrode terminal (21) is disposed on the cover plate (10), the cell (30) further comprises a second tab (33) extending from the top surface of the cell main body (31), the second tab (33) is electrically connected to the second electrode terminal (21) after being bent, and a second bent portion (331) is formed at the bent portion of the second tab (33);

the side edge (42) comprises a first side edge (421) and a second side edge (422), the first side edge (421) and the second side edge (422) are arranged at intervals, the first side edge (421) is arranged opposite to the first bent part (321), and the second side edge (422) is arranged opposite to the second bent part (331), so that the second bent part (331) is limited on the inner side of the second side edge (422).

9. The battery according to any one of claims 1 to 7, wherein the battery further comprises a second electrode terminal (21), the second electrode terminal (21) is disposed on the cover plate (10), the cell (30) further comprises a second tab (33) extending from the top surface of the cell main body (31), the second tab (33) is electrically connected to the second electrode terminal (21) after being bent, and a second bent portion (331) is formed at the bent portion of the second tab (33);

the side edge (42) and the second bent portion (331) are oppositely arranged, so that the second bent portion (331) is limited at the inner side of the side edge (42).

10. A battery module comprising the battery of any one of claims 1 to 9.

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