CN220544176U - Battery and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery device, wherein the battery comprises: the battery cell comprises a battery cell body and a tab connected to the battery cell body; the switching sheet is positioned at one side of the battery cell body, a through hole is formed on the switching sheet, and the lug penetrates through the through hole; the minimum distance between the edge of the through hole and the edge of the adapter piece is more than or equal to 0.5mm and less than or equal to 30mm. The battery provided by the disclosure can ensure the overcurrent area of the edge of the switching piece, and can also improve the connection stability of the switching piece and other structures.

Description

Battery and battery device

Technical Field

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

Background

In the related art, the tab can extend to one side of the switching piece, which is away from the battery core body, through the through hole in the switching piece so as to be welded with the side surface of the switching piece, which is away from the battery core body, and the tab can be prevented from being bent into two layers, so that the space utilization rate of the inside of the battery can be improved.

However, the through holes on the tab not only affect the conductive effect of the tab but also affect the connection stability of the tab and other structures.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The utility model provides a battery which can ensure the welding area of a switching sheet and a tab and can ensure the conductive effect of the switching sheet.

The battery includes:

the battery cell comprises a battery cell body and a tab connected to the battery cell body;

the switching piece is positioned at one side of the battery cell body, a through hole is formed in the switching piece, and the tab penetrates through the through hole;

the minimum distance between the edge of the through hole and the edge of the transfer sheet is more than or equal to 0.5mm and less than or equal to 30mm.

In the utility model, the minimum distance between the edge of the through hole and the edge of the switching piece is too small, so that the overcurrent area of the edge of the switching piece is reduced, and the conductive effect of the switching piece is affected; the minimum distance between the border of through-hole and the border of changeover piece is too big, can reduce the area that the changeover piece is located the inboard part of through-hole, and the inboard part of changeover piece through-hole can be used for with structure welding such as utmost point ear, utmost point post, and the area that the changeover piece is located the inboard part of through-hole is too little can influence the welding area of changeover piece and other structures to influence the connection stability of changeover piece and other structures, and then there is the risk of changeover piece local overcurrent failure. The minimum distance between the edge of the through hole and the edge of the switching piece is set to be proper, and the arrangement can ensure the overflow area of the edge of the switching piece and improve the connection stability between the switching piece and other structures.

The utility model also provides a battery device which comprises the battery, and the battery not only can ensure the overcurrent area of the edge of the switching sheet, but also can improve the connection stability of welding the switching sheet and other structures, so that the battery device also has better power supply performance and structural stability.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

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 have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.

Wherein:

fig. 1 is a schematic view of the structure of an exemplary embodiment of a battery of the present disclosure;

FIG. 2 is a top view of an exemplary embodiment of a battery of the present disclosure;

fig. 3 is an enlarged view of a partial area AA of the battery shown in fig. 2.

Reference numerals illustrate:

1. a battery cell; 11. a cell body; 12. a tab; 121. an extension; 2. a transfer sheet; 21. a through hole; 22. a first edge.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being "on," "under," or "in" or "out" of another element or feature being "on," "under" or "in" or "out" of the other element or elements, it can be directly connected to the other element or elements, or indirectly connected to the other element or elements via intervening elements.

The present exemplary embodiment first provides a battery, as shown in fig. 1-3, fig. 1 is a schematic structural view of an exemplary embodiment of a battery of the present disclosure, fig. 2 is a top view of an exemplary embodiment of a battery of the present disclosure, and fig. 3 is an enlarged view of a partial area AA of the battery shown in fig. 2.

The battery includes: the battery cell 1 and the switching piece 2, wherein the battery cell 1 comprises a battery cell body 11 and a tab 12 connected to the battery cell body 11; the switching sheet 2 is positioned at one side of the battery core body 11, a through hole 21 is formed on the switching sheet 2, and the tab 12 penetrates through the through hole 21; the minimum distance between the edge of the through hole 21 and the edge of the adapter piece 2 is 0.5mm or more and 30mm or less.

In the present exemplary embodiment, too small a minimum distance between the edge of the through hole 21 and the edge of the interposer 2 reduces the overcurrent area of the interposer edge to affect the conductive effect of the interposer 2; the minimum distance between the edge of the through hole 21 and the edge of the switching piece 2 is too large, so that the area of the part of the switching piece 2 located inside the through hole 21 can be reduced, the switching piece 2 can be welded with the electrode lug, the electrode post and other structures through the part located inside the through hole 21, the welding area of the switching piece 2 and other structures can be influenced due to the fact that the area of the part of the switching piece 2 located inside the through hole is too small, the connection stability of the switching piece 2 and other structures is influenced, and the risk of local overcurrent failure exists. In the present exemplary embodiment, the minimum distance between the edge of the through hole 21 and the edge of the adapter piece 2 is set to a proper size, which can ensure the overcurrent area of the edge of the adapter piece and can also improve the connection stability between the adapter piece 2 and other structures.

In the present exemplary embodiment, the minimum distance between the edge of the through hole 21 and the edge of the patch 2 may be equal to 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm.

In this exemplary embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, and the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and the corners between sides are not necessarily right angles, and may be arc transitions.

In this exemplary embodiment, as shown in fig. 1-3, the battery cell body 11 has a length direction X, a height direction Z, and a thickness direction Y, the height direction Z of the battery cell body 11 is a direction in which the tab 12 protrudes from the battery cell body 11, the thickness direction Y of the battery cell body 11 is a direction perpendicular to the largest side surface of the battery cell body 11, and the length direction X of the battery cell body 11 is a direction perpendicular to the height direction Z and the thickness direction Y of the battery cell body 11.

In the present exemplary embodiment, as shown in fig. 1 to 3, the through-hole 21 may be elongated, that is, the opening of the through-hole 21 is elongated. The length direction of the through hole 21 may be parallel to the length direction X of the cell body 11, and the width direction of the through hole 21 may be parallel to the thickness direction Y of the cell body 11. The width direction of the tab 12 may be parallel to the length direction of the cell body 11, and the width direction of the tab 12 in the through hole 21 may be parallel to the length direction of the through hole 21.

In the present exemplary embodiment, the elongated through-holes may be rectangular as shown in fig. 1-3, it being understood that in other exemplary embodiments, the through-holes 21 may also be other shapes, for example, the through-holes 21 may also be rounded rectangles, arcs, curved "S" shapes, etc.

In this exemplary embodiment, as shown in fig. 1-3, the tab 12 may include an extension 121 extending to a side of the tab 2 away from the cell body 11, and the extension 121 is welded to a side of the tab 2 away from the cell body 11.

In this exemplary embodiment, as shown in fig. 1-3, the adaptor 2 may be located on a side of the battery cell 1 where the tab 12 is located, and after the tab 12 extends to a side of the adaptor 2 away from the battery cell body 11, the tab 12 may be bent, so as to form an extension portion 121 welded to a side of the adaptor 2 away from the battery cell body 11, where a thickness direction of the extension portion 121 is parallel to a thickness direction of the adaptor, and the extension portion 121 may be welded to the tab 12 by laser.

In the present exemplary embodiment, as shown in fig. 1 to 3, the adaptor 2 includes two first edges 22 oppositely disposed in the thickness direction of the cell body 11, and the through hole 21 is disposed near the first edges 22; in the through hole 21 and the first edge 22 adjacent thereto, the extension 121 of the tab 12 penetrating the through hole 21 is welded to the interposer web 2 at a side of the through hole 21 away from the first edge 22. For example, as shown in fig. 3, the right through hole 21 is disposed near the right first edge 22, and the extension 121 of the tab penetrating the right through hole 21 is welded to the side of the right through hole 21 away from the right first edge 22; the left through hole 21 is disposed near the left first edge 22, and the extension 121 of the tab penetrating the left through hole 21 is welded to the left through hole 21 at a side far from the left first edge 22.

It should be noted that the through hole 21 is disposed near the first edge 22, and it is understood that the distance between the through hole 21 and the first edge 22 near it is smaller than the distance between the through hole and the other first edge 22. In addition, in the through hole 21 and the first edge 22 adjacent thereto, the side of the switching piece located on the through hole away from the first edge 22 can also be used for welding other structures such as poles.

In the present exemplary embodiment, as shown in fig. 1 to 3, the minimum distance L1 between the edge of the through hole 21 and the edge of the interposer 2 is 0.6mm or more and 20mm or less in the thickness direction Y of the cell body 11. For example, L1 may be equal to 0.6mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm.

In the present exemplary embodiment, since in the through hole 21 and the first edge 22 adjacent thereto, the extension 121 is provided to be folded toward the side of the through hole 21 away from the first edge 22. If L1 is too small, the overcurrent area at the edge of the switching sheet 2 is too small, so that the conductive effect of the switching sheet is affected; if L1 is too large, the welding area of the adapter plate 2 with the extension 121 may be small, thereby affecting the welding stability of the adapter plate 2 and the extension 121, and even causing local excessive loss of the adapter plate 2 and the extension 121. The present exemplary embodiment sets L1 to a proper size, which can secure the overcurrent area of the tab edge as well as improve the structural stability between the tab 2 and the extension 121.

In the present exemplary embodiment, as shown in fig. 1 to 3, in the longitudinal direction X of the cell body 11, the minimum distance L3 between the edge of the through hole 21 and the edge of the interposer web 2 is 2mm or more and 20mm or less. For example, L3 may be equal to 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm. If L3 is too small, the overcurrent area at the edge of the switching sheet 2 is too small, so that the conductive effect of the switching sheet is affected; if L3 is too large, the length of the through hole 21 is too small, which results in a smaller width of the tab 12 penetrating the through hole 21, thereby affecting the overcurrent capability of the tab 12. In the present exemplary embodiment, L3 is set to a suitable size, which can ensure the overcurrent area of the edge of the tab, and can also ensure the overcurrent capability of the tab 12.

In the present exemplary embodiment, the minimum distance between the edge of the through hole 21 and the edge of the interposer 2 may be either L1 or L3, or the minimum distance between the edge of the through hole 21 and the edge of the interposer 2 in other directions.

In the present exemplary embodiment, as shown in fig. 1 to 3, the distance between the through hole 21 and the first edge 22 adjacent thereto in the thickness direction of the cell body 11 is L1, and the distance between the through hole 21 and the other first edge 22 in the thickness direction of the cell body 11 is L2. The distance between the through hole 21 and the first edge 22 adjacent to the through hole in the thickness direction of the battery cell body 11 is the minimum distance between the edge of the through hole 21 and the edge of the adapter piece 2 in the thickness direction of the battery cell body 11. In the present exemplary embodiment, L1/L2 may be 0.02 or more and 0.5 or less. For example, L1/L2 may be equal to 0.02, 0.04, 0.06, 0.08, 0.1, 0.12, 0.14, 0.16, 0.18, 0.2, 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48, 0.5. The L1/L2 can not cause the excessively small overflow area of the switching sheet because of excessively small overflow area; the L1/L2 can not cause too small welding area of the switching piece and the tab because of too large.

In this exemplary embodiment, as shown in fig. 1 to 3, the battery may include a plurality of battery cells 1, and accordingly, the battery includes a plurality of tabs. The rotor plate 2 may have a plurality of through holes 21 formed therein, and at least some of the different tabs 12 may be disposed through the different through holes 21. In the present exemplary embodiment, at least part of the through holes 21 may be disposed near the two first edges 22, respectively. The present exemplary embodiment sets the through holes 21 near the two first edges 22, respectively, thereby avoiding that the through holes 21 are collectively set near the same first edge 22, which can avoid mutual interference of the collectively set through holes.

It should be understood that in other exemplary embodiments, the battery may also include a single cell, and the tab 2 may have a through hole formed therein, and accordingly, only one tab may be welded to the tab 2.

In this exemplary embodiment, as shown in fig. 1-3, the battery may include two tabs: the tab in the battery cell 1 may include a positive tab and a negative tab, the positive tab and the positive tab are welded, and the negative tab are welded. The switching piece 2 is a metal piece.

The battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion comprises a first pole piece, a separator and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.

In this exemplary embodiment, the battery may also be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end faces and a curved surface between the two circular end faces.

The battery can be a laminated battery, the laminated battery is convenient to group, and the battery with longer length can be obtained through processing. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Alternatively, the battery may be a wound battery in which a first pole piece, a second pole piece opposite in electrical property to the first pole piece, and a separator sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

The present exemplary embodiment also provides a battery device, which in the present exemplary embodiment is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixed a plurality of batteries. The battery may be a cylindrical battery, and the cylindrical battery may be disposed on the support plate, thereby forming a battery module.

The battery pack comprises a plurality of batteries and a box body, wherein the box body is used for fixing the plurality of batteries.

It should be noted that the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or, a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by 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 disclosure herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure 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 examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

The drawings in the present disclosure relate only to the structures to which the present disclosure relates, and other structures may be referred to in general. The embodiments of the present disclosure and features in the embodiments may be combined with each other to arrive at a new embodiment without conflict. It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the disclosed embodiments without departing from the spirit and scope of the disclosed embodiments, which are intended to be encompassed within the scope of the appended claims.

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

Claims (10)

1. A battery, the battery comprising:

the battery cell (1), the battery cell (1) comprises a battery cell body (11) and a tab (12) connected to the battery cell body (11);

the switching piece (2) is positioned at one side of the battery cell body (11), a through hole (21) is formed in the switching piece (2), and the electrode lug (12) penetrates through the through hole (21);

the minimum distance between the edge of the through hole (21) and the edge of the transfer sheet (2) is more than or equal to 0.5mm and less than or equal to 30mm.

2. The battery according to claim 1, characterized in that a minimum distance between an edge of the through hole (21) and an edge of the through tab (2) in a thickness direction (Y) of the cell body (11) is 0.6mm or more and 20mm or less.

3. The battery according to claim 1, wherein a minimum distance between an edge of the through hole (21) and an edge of the through tab (2) in a length direction (X) of the cell body (11) is 2mm or more and 20mm or less.

4. A battery according to any one of claims 1-3, characterized in that the tab (12) comprises an extension (121) extending to a side of the changeover tab (2) remote from the cell body (11), the extension (121) being welded to a side of the changeover tab (2) remote from the cell body (11).

5. The battery according to claim 4, wherein the adapter piece (2) comprises two first edges (22) oppositely arranged in the thickness direction (Y) of the cell body (11), and the through hole (21) is arranged close to the first edges (22);

in the through hole (21) and the first edge (22) close to the through hole, an extension part (121) of the tab (12) penetrating through the through hole (21) is welded to the adapter piece (2) and is located on one side of the through hole (21) away from the first edge (22).

6. A battery according to any one of claims 1-3, wherein the adapter piece (2) comprises two first edges (22) arranged opposite each other in the thickness direction (Y) of the cell body (11), the through hole (21) being arranged close to the first edges (22);

the distance between the through hole (21) and the first edge (22) close to the through hole in the thickness direction (Y) of the battery cell body (11) is L1, the distance between the through hole (21) and the other first edge (22) in the thickness direction (Y) of the battery cell body (11) is L2, and L1/L2 is more than or equal to 0.02 and less than or equal to 0.8.

7. A battery according to any one of claims 1-3, characterized in that the through-hole (21) is elongated, the length direction of the through-hole (21) is parallel to the length direction (X) of the cell body (11), and the width direction of the through-hole (21) is parallel to the thickness direction (Y) of the cell body (11).

8. A battery according to any one of claims 1-3, characterized in that the adapter tab (2) comprises two first edges (22) arranged opposite each other in the thickness direction (Y) of the cell body (11);

the battery comprises a plurality of battery cells (1), a plurality of through holes (21) are formed in the adapter piece (2), and at least part of different electrode lugs (12) are arranged in different through holes (21) in a penetrating mode;

at least part of the through holes (21) are respectively arranged near the two first edges (22).

9. A battery according to any one of claims 1 to 3, wherein the battery is a quadrangular battery.

10. A battery device, characterized in that it comprises a battery according to any one of claims 1-9.