CN220066041U - 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: a battery case, an electrode assembly, a support plate, and a protective layer, the battery case being formed with an opening; the cover plate component is covered on the opening of the battery shell; the electrode assembly is positioned in the battery shell and comprises a battery core body and a tab; the support plate is positioned between the cover plate assembly and the battery cell body and comprises a support part and a bearing part, the support part is arranged in a protruding way relative to the bearing part and faces the battery cell body, and the electrode lugs are bent and extend from the battery cell body to one side of the bearing part facing the cover plate assembly; the electrode lug comprises a bending part, and the protective layer is arranged on the side surface of the bending part facing the supporting plate. The present disclosure may reduce the risk of tab damage through a protective layer.

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 battery comprises an electrode assembly, the electrode assembly comprises a battery core body and a tab, in order to avoid the tab occupying excessive space of a battery shell, the tab is bent and arranged, the bent tab is easy to be inserted into the battery core body in an inverted mode to cause internal short circuit of the battery, meanwhile, partial stress of bending of the tab is relatively concentrated, and particularly when the bending part is close to other structures, the bending part of the tab is easy to be damaged due to arrangement of 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 solve the technical problem that the tab is easy to damage.

The battery includes:

a battery case formed with an opening;

the cover plate component is covered on the opening of the battery shell;

an electrode assembly located within the battery housing, the electrode assembly including a cell body and a tab;

the support plate is positioned between the cover plate assembly and the battery cell body and comprises a support part and a bearing part, the support part is arranged in a protruding way relative to the bearing part and faces the battery cell body, and the electrode lugs are bent and extend from the battery cell body to one side of the bearing part, which faces the cover plate assembly;

the electrode lug comprises a bending part, and the protective layer is arranged on the side surface of the bending part facing the supporting plate.

On the one hand, the bearing part can bear the lug which is bent and extends to one side of the bearing part facing the cover plate component, and the bearing part can prevent the lug from being reversely inserted into the battery cell body, so that the risk that the battery cell body is easily damaged by the reverse insertion of the lug can be improved. On the other hand, because the lug bending part needs to be arranged opposite to the supporting plate, the supporting plate is inevitably provided with structures such as burrs in the processing and preparation process, and the structures such as burrs are easy to puncture the lug. According to the utility model, the side surface of the bending part facing the supporting plate is provided with the protective layer, and the protective layer can reduce the risk of damaging the lug of the supporting plate.

The utility model also provides a battery device which comprises the battery, the battery can improve the technical problem that the tab is easy to damage, and the battery device has good safety and stability correspondingly.

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 schematic view of the structure of a support plate and tabs in an exemplary embodiment of a battery of the present disclosure;

fig. 3 is a schematic view illustrating a structure of a tab and a support plate in another exemplary embodiment of a battery of the present disclosure;

fig. 4 is an enlarged view of a partial area a in fig. 3;

fig. 5 is a schematic view illustrating a structure of a tab and a support plate in another exemplary embodiment of a battery of the present disclosure;

FIG. 6 is an enlarged view of a partial area B in FIG. 5;

fig. 7 is a partial schematic structure of an electrode assembly in another exemplary embodiment of a battery of the present disclosure.

Reference numerals illustrate:

1. a cover plate assembly; 2. an electrode assembly; 3. a support plate; 4. a protective layer; 5. a gap; 6. chamfering; 8. a battery case; 21. a cell body; 22 pole ears; 31. a support part; 32. a carrying part; 211. a first portion; 222. a second portion; 223. and a bending part.

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.

As shown in fig. 1 and 2, fig. 1 is a schematic structural view of an exemplary embodiment of a battery according to the present disclosure, and fig. 2 is a schematic structural view of a support plate and a tab according to an exemplary embodiment of a battery according to the present disclosure. The battery may include a battery case 8, a cap plate assembly 1, an electrode assembly 2, a support plate 3, the battery case 8 being formed with an opening; the cover plate component 1 is covered on the opening of the battery shell 8; an electrode assembly 2 is positioned in the battery shell 8, and the electrode assembly 2 comprises a battery cell body 21 and a tab 22; the support plate 3 is located between the cover plate assembly 1 and the battery cell body 21, the support plate 3 comprises a support portion 31 and a bearing portion 32, the support portion 31 is arranged to face the battery cell body 21 in a protruding mode relative to the bearing portion 32, and the tab 22 is bent and extended from the battery cell body 21 to the side, facing the cover plate assembly 1, of the bearing portion 32.

In the present exemplary embodiment, the cell body 21 is a portion of the electrode assembly coated with an active material. The cover assembly may include one or more of a seal, an upper plastic, a lower plastic, and a cover body.

In the present exemplary embodiment, the supporting portion 31 may be used to abut against the cell body 21, and the carrying portion 32 may be used to carry the tab 22 extending to a side of the carrying portion 32 facing the cover plate assembly 1. The battery can avoid the battery core body 21 from being damaged due to the fact that the tab 22 is reversely inserted into the battery core body 21. However, the stress at the bent portion of the tab 22 is relatively concentrated, and the tab 22 is easily damaged by the structure such as burrs on the support plate 3.

Based on this, the present exemplary embodiment provides another battery, as shown in fig. 3 and 4, fig. 3 is a schematic structural view of a tab and a support plate in another exemplary embodiment of the battery of the present disclosure, and fig. 4 is an enlarged view of a partial area a in fig. 3. The overall structure of the battery may be the same as the battery shown in fig. 1 and 2. The battery includes, in addition to: in addition to the battery case 8, the cover plate assembly 1, the electrode assembly 2 and the support plate 3, the battery further comprises a protective layer 4, the tab 22 comprises a bending portion 223, and the protective layer 4 is disposed on a side surface of the bending portion 223 facing the support plate 3.

On the one hand, the carrying portion 32 in the present exemplary embodiment is capable of carrying the tab 22 bent and extended to the side of the carrying portion 32 facing the cover assembly, and the carrying portion 32 may block the tab 22 from being inserted into the battery cell body 21 upside down, so that the present exemplary embodiment may improve the risk that the battery cell body 21 is easily damaged by the tab 22 upside down. On the other hand, since the bending portion 223 needs to be disposed opposite to the supporting plate, the supporting plate is inevitably provided with structures such as burrs during the processing and preparation process, and the structures such as burrs are easy to pierce the tab. The present exemplary embodiment is provided with the protective layer 4 at the side of the bent portion 223 facing the support plate 3, and the protective layer 4 can reduce the risk of damaging the bent portion 223 by the support plate 3.

In the present exemplary embodiment, the bending portion 223 has a partial structure having a bending state. The carrying portion 32 may be in contact with the tab 22, and a gap may be provided between the carrying portion 32 and the tab 22. Similarly, the support portion 31 may be in contact with the cell body 21, and a gap may be provided between the support portion 31 and the cell body 21.

In this exemplary embodiment, as shown in fig. 3 and 4, the tab 22 may further include: a first portion 221 and a second portion 222, wherein the first portion 221 is led out from the cell body 21 and is positioned at one side of the support plate 3 facing the cell body 21; the second portion 222 is located on the side of the support plate 3 facing away from the cell body 21. Wherein the bending portion 223 is connected between the first portion 221 and the second portion 222, and at least a part of the bending portion 223 is located at one side of the support plate 3 in the first direction X, and the distribution direction of the support plate 3 and the cell body 21 is perpendicular to the first direction X. For example, the bent portion 223 may be located at one side of the support plate 3 in the width direction thereof. The first portion 221 may be connected to the cell body 21, the second portion 222 may overlap the support plate 3, and the support plate 3 may prevent the second portion 222 from being inserted into the cell body.

In the present exemplary embodiment, as shown in fig. 3 and 4, burrs on the support plate 3 easily damage the bent portion 223 during the assembly process of the support plate 3 and during the subsequent use of the battery. The present exemplary embodiment can reduce the risk of damage to the bent portion 223 by the protective layer 4 located on the bent portion 223.

In the present exemplary embodiment, as shown in fig. 5 and 6, fig. 5 is a schematic structural view of a tab and a support plate in another exemplary embodiment of the battery of the present disclosure, and fig. 6 is an enlarged view of a partial region B in fig. 5. In the present exemplary embodiment, the sides of the tabs 22 facing the support plate 3 are each covered with the protective layer 4. The present exemplary embodiment not only covers the protection layer 4 on the bending portion 223, but also covers the protection layer 4 on the side of the first portion 221 and the second portion 222 facing the support plate 3, and the protection layer 4 can reduce damage to the first portion 221 and the second portion 222 caused by burrs and the like on the support plate 3.

In the present exemplary embodiment, as shown in fig. 7, a schematic view of a partial structure of an electrode assembly in another exemplary embodiment of a battery of the present disclosure is shown. In this exemplary embodiment, the electrode assembly 2 may include two cell bodies 21, and a portion of the protective layer 4 may extend between two adjacent cell bodies 21. On the one hand, the protection layer 4 is not only arranged on the tab 22, but also part of the protection layer 4 is arranged between the adjacent cell bodies 21, and the protection layer 4 can be more stably arranged on the electrode assembly 2 under the clamping of the adjacent cell bodies 21. On the other hand, part of the protective layer 4 is adhered to the cell body 21, and the protective layer 4 can also pre-fix the tabs during the battery assembly process. On the other hand, the protection layer 4 can also reduce the damage of the structure such as burrs on the support plate 3 to the cell body 21.

In this exemplary embodiment, the electrode assembly 2 may include two cell bodies 21, and each cell body 21 is correspondingly provided with two tabs 212: positive electrode tab and negative electrode tab. It should be appreciated that in other exemplary embodiments, the battery may include other numbers of cell bodies, e.g., the number of cell bodies in the battery may be 1, 3, 4, 5, 6, etc. The clearance between electric core body and the electric core body can be convenient for electric core body heat dissipation, especially in the battery that calorific capacity is great such as quick charge battery, the heat dissipation rate of battery can be improved in the setting of a plurality of electric core bodies.

In the present exemplary embodiment, as shown in fig. 3 to 6, a gap 5 is provided between the bent portion 223 and the support plate 3. The present exemplary embodiment reserves the gap 5 between the bent portion 223 and the support plate 3, so that the bent portion 223 and the support plate 3 can be prevented from being in direct contact, and the arrangement can reduce the risk of damaging the bent portion 223 by the support plate 3.

In the present exemplary embodiment, as shown in fig. 3 to 7, the protective layer 4 may include an insulating tape. The insulating tape may be adhered to the tab 22. The protective layer 4 may be polyvinyl chloride, polyolefin insulating tape, or the like. The insulating tape not only can play an insulating protection role, but also can be adhered to the tab 22 more conveniently.

In the present exemplary embodiment, as shown in fig. 3 to 7, the thickness of the protective layer 4 may be 0.02mm to 0.1mm, for example, the thickness of the protective layer 4 may be 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, or the like. The present exemplary embodiment sets the thickness of the protective layer 4 to a suitable range, and on the one hand, the protective layer 4 may have a sufficient thickness to effectively improve the technical problem of burrs on the support plate 3 damaging the tab 22; on the other hand, the thickness of the protective layer 4 does not affect the installation space of other structures inside the battery due to excessive thickness.

In the present exemplary embodiment, as shown in fig. 3 to 7, the edges of the sides of the support plates 3 facing the tabs 22 may be formed with chamfers 6. The chamfer 6 may reduce the risk of damage to the support plate 3 to the tab 22. As shown in fig. 3-7, the chamfer 6 may be rounded. The rounded corners have a smoother surface so that the risk of damage to the tab 22 by the support plate 3 can be further reduced.

It should be appreciated that in other exemplary embodiments, the chamfer 6 may also be a chamfer formed on the support plate 3 near the side edge of the tab 22. Furthermore, in other exemplary embodiments, the edges of the sides of the support plates 3 facing the tabs 22 may not be chamfered.

In the present exemplary embodiment, the support plate 3 may be an insulating structure, and for example, the support plate 3 may be a plastic, rubber, mica, ceramic, or the like.

In the present exemplary embodiment, the battery may be a lithium ion battery, it being understood that in other exemplary embodiments, the battery may also be a cadmium nickel battery, a nickel hydrogen battery, a lithium polymer battery, or the like.

The battery is a minimum unit that includes an electric core and an electrolyte and is 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 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 other exemplary embodiments, the battery may be of any other structure, for example, the battery may be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end faces and a curved face 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. In the wound battery, a plurality of laminated single-piece tabs may be wound from the same pole piece.

The present exemplary embodiment also provides a battery device including the above battery and a case, the battery being disposed in the case, and a side of the battery provided with the cover plate assembly being disposed facing the bottom of the case.

The present exemplary embodiment inverts the battery and the heat of the battery is concentrated toward the bottom, so that the direct impact of the heat generated by the battery on the passenger compartment can be avoided. In addition, the opposite side surfaces of the cover plate component in the battery shell form the top surface of the battery, and the top surface of the battery is relatively flat, so that the heat plate and other structures can be conveniently replaced.

In addition, after the battery is inverted, the supporting plate can also play a role in supporting the battery core body, so that the battery core body is prevented from being pressed onto the cover plate assembly, and the risk that the battery core body presses the pole on the cover plate assembly can be reduced. Meanwhile, after the battery is inverted, the electrode lugs are easier to be inserted into the battery core body in an inverted mode, and the supporting plate can effectively improve the risk of the inverted insertion of the electrode lugs into the battery core body.

The battery device may be 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 (11)

1. A battery, the battery comprising:

a battery case (8) having an opening formed therein;

the cover plate assembly (1) is covered on the opening of the battery shell (8);

an electrode assembly (2) located within the battery case (8), the electrode assembly (2) including a cell body (21) and a tab (22);

the support plate (3) is positioned between the cover plate assembly (1) and the battery cell body (21), the support plate (3) comprises a support part (31) and a bearing part (32), the support part (31) is arranged in a protruding mode relative to the bearing part (32) and faces the battery cell body (21), and the tab (22) is bent and extends from the battery cell body (21) to one side of the bearing part (32) facing the cover plate assembly (1);

the protection layer (4), the tab (22) includes kink (223), protection layer (4) set up in kink (223) face in backup pad (3) side.

2. The battery according to claim 1, characterized in that the sides of the tabs (22) facing the support plate (3) are each covered with the protective layer (4).

3. The battery according to claim 1, wherein the electrode assembly (2) comprises a plurality of cell bodies (21), and a portion of the protective layer (4) extends between two adjacent cell bodies (21).

4. A battery according to any one of claims 1-3, characterized in that the edges of the side of the support plate (3) facing the tab (22) are formed with chamfers.

5. The battery of claim 4, wherein the chamfer is rounded.

6. A battery according to any one of claims 1-3, characterized in that a gap is provided between the bending part (223) and the support plate (3).

7. A battery according to any one of claims 1-3, wherein the tab (22) further comprises:

a first portion (221) which is led out from the cell body (21) and is positioned at one side of the supporting plate (3) facing the cell body (21);

a second portion (222) located on a side of the support plate (3) facing away from the cell body (21);

the bending part (223) is connected between the first part (221) and the second part (222), at least part of the structure of the bending part (223) is positioned on one side of the supporting plate (3) in the first direction (X), and the distribution direction of the supporting plate (3) and the battery cell body (21) is perpendicular to the first direction (X).

8. A battery according to any one of claims 1-3, characterized in that the protective layer (4) comprises an insulating tape, which is glued to the side of the tab (22).

9. A battery according to any of claims 1-3, characterized in that the thickness of the protective layer (4) is 0.02mm-0.1mm.

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

11. The battery device according to claim 10, further comprising a case, wherein the battery is provided in the case, and a side of the battery provided with the cover plate assembly (1) is provided facing the bottom of the case.