CN220341481U - Battery and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and a battery device, wherein the battery comprises a shell, a cover plate assembly, a battery core assembly and an inner insulating piece; the battery cell assembly comprises a battery cell body and an inner insulating film, wherein the battery cell body is provided with a first surface facing the cover plate assembly, and a part of the inner insulating film is arranged on other surfaces of the battery cell body except the first surface; the inner insulating piece is positioned between the cover plate assembly and the first surface of the battery cell body, a boss is arranged on one side surface of the inner insulating piece, which is opposite to the cover plate assembly, the boss is positioned at the end part of the inner insulating piece along the first direction, the boss is abutted to the first surface, and the other part of the inner insulating film is positioned on the side surface of the inner insulating piece and is connected with the side surface of the boss; the plane where the first surface is located is taken as a reference plane, on the reference plane, the orthographic projection of the inner insulating part is rectangular, the extending direction of the long side of the rectangle is the first direction, and the length of each boss in the first direction accounts for 5% -10% of the length of the inner insulating part.

Description

Battery and battery device

Technical Field

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

Background

In the design scheme of current battery, be provided with interior insulating part between apron subassembly and the electric core body, interior insulating part's thickness is thinner, and the interior insulating film that electric core body surface set up is great with interior insulating part's the connection degree of difficulty, leads to interior insulating film to set up inconveniently, and the connection effect is not good, influences the insulating properties of battery.

Disclosure of Invention

It is therefore a primary object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery having a better connection between an inner insulating film and an inner insulating member.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, there is provided a battery including a case, a cap assembly, a cell assembly, and an inner insulator; at least one end of the shell is provided with an opening; the cover plate component is arranged at the opening of the shell; the battery cell assembly comprises a battery cell body and an inner insulating film, wherein the battery cell body is arranged in the shell and provided with a first surface facing the cover plate assembly, and a part of the inner insulating film is arranged on other surfaces of the battery cell body except the first surface; the inner insulating piece is arranged in the shell and is positioned between the cover plate assembly and the first surface of the battery cell body, a boss is arranged on one side surface of the inner insulating piece, which is opposite to the cover plate assembly, the boss is positioned at the end part of the inner insulating piece along the first direction, the boss is abutted to the first surface, and the other part of the inner insulating film is positioned on the side surface of the inner insulating piece and is connected with the side surface of the boss; the plane where the first surface is located is taken as a reference plane, on the reference plane, the orthographic projection of the inner insulating part is rectangular, the extending direction of the long side of the rectangle is the first direction, and the length of the boss accounts for 5% -10% of the length of the inner insulating part along the first direction.

According to the technical scheme, the battery provided by the utility model has the advantages and positive effects that:

the battery provided by the utility model comprises an inner insulating part, wherein a boss is arranged on one side surface of the inner insulating part facing the battery core body, the boss is positioned at the end part of the inner insulating part along the long side direction, and the length of each boss along the long side direction accounts for 5% -10% of the length of the inner insulating part. Through the structural design, the inner insulating film can be fixed by utilizing the side face of the boss of the inner insulating piece. On the basis, the utility model can avoid the too small length of the boss, so that the inner insulating film and the inner insulating piece have better connection effect, further ensure the insulating performance of the battery and enhance the structural strength of the inner insulating piece. Meanwhile, the utility model can avoid the excessive occupation of the space inside the battery due to the overlarge length of the boss.

Another main object of the present utility model is to overcome at least one of the drawbacks of the prior art described above, and to provide a battery device employing the battery.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to another aspect of the present utility model, there is provided a battery device including the battery set forth in the present utility model.

As can be seen from the above technical solutions, the battery device provided by the present utility model has the following advantages and positive effects:

according to the battery device provided by the utility model, the insulation performance of the battery can be ensured, the structural strength of the inner insulating part can be enhanced, and meanwhile, the space in the battery can be saved.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic perspective view of a battery according to an exemplary embodiment;

fig. 2 is an exploded perspective view of the battery shown in fig. 1;

FIG. 3 is a schematic plan view of a portion of the structure shown in FIG. 2;

fig. 4 is a schematic perspective view of the inner insulator shown in fig. 2;

FIG. 5 is a schematic view of another angular perspective of the inner insulator shown in FIG. 4;

FIG. 6 is a schematic plan view of the inner insulator shown in FIG. 4;

fig. 7 is a schematic perspective view of an inner insulator of a battery according to another exemplary embodiment;

FIG. 8 is a schematic view of another angled perspective of the inner insulator shown in FIG. 7;

FIG. 9 is a top view of the inner insulator shown in FIG. 7;

fig. 10 is a bottom view of the inner insulator shown in fig. 7.

The reference numerals are explained as follows:

100. a housing;

200. a cover plate assembly;

300. a cell body;

301. a first surface;

310. an inner insulating film;

400. an inner insulator;

410. a boss;

420. a groove;

430. a through hole;

440. a separation rib;

H. height of the steel plate;

l1, length;

l2, length;

x, a first direction;

y, the second direction;

and Z, third direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1, a schematic perspective view of a battery according to the present utility model is representatively illustrated. In this exemplary embodiment, the battery proposed by the present utility model is described as being applied to a vehicle-mounted battery as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present utility model to other types of battery devices, and such changes are still within the principles of the battery presented herein.

As shown in fig. 1, in an embodiment of the present utility model, a battery according to the present utility model includes a case 100, a cap assembly 200, a cell assembly, and an inner insulator 400. Referring to fig. 2-6 in conjunction, an exploded perspective view of a battery is representatively illustrated in fig. 2; a plan view of a partial structure of the battery is representatively illustrated in fig. 3, in which the cap plate assembly 200 and the inner insulation film 310 are specifically illustrated, and the inner insulation film 310 is partially peeled off to show the inner cell body 300 and the inner insulator 400; a schematic perspective view of the inner insulator 400 is representatively illustrated in fig. 4; another angular perspective schematic view of the inner insulator 400 is representatively illustrated in fig. 5; fig. 6 is a schematic plan view representatively illustrating the inner insulator 400. The structure, connection mode and functional relationship of the main components of the battery according to the present utility model will be described in detail with reference to the above drawings.

As shown in fig. 1 to 6, in an embodiment of the present utility model, at least one end of the housing 100 has an opening. The cover assembly 200 is disposed at an opening of the housing 100. The battery cell assembly comprises a battery cell body 300 and an inner insulating film 310, wherein the battery cell body 300 is arranged in the shell 100, and the battery cell body 300 is provided with a first surface 301 facing the cover plate assembly 200. Specifically, the cell body 30 has two surfaces parallel to the cover assembly 200, one of the two surfaces is a first surface 301, and the first surface 301 is disposed closer to the cover assembly 200 than the other of the two surfaces. A part of the inner insulating film 310 is provided on the other surface of the cell body 300 except the first surface 301. The inner insulator 400 is disposed in the housing 100, and the inner insulator 400 is located between the cover assembly 200 and the first surface 301 of the cell body 300. The boss 410 is disposed on a side surface of the inner insulator 400 facing away from the cover plate assembly 200, and the boss 410 is located at an end of the inner insulator 400 along the first direction X, where the end refers to other areas of the inner insulator 400 except for the middle position along the first direction X, in other words, the boss 410 disposed at one end of the inner insulator 400 may have a certain distance from the edge of the end of the inner insulator 400, which may be a flush state as shown in the drawings. The boss 410 abuts against the first surface 301 of the battery cell body 300, another portion of the inner insulating film 310 is located on the side surface of the inner insulating member 400, and the portion of the inner insulating film 310 is connected to the side surface of the boss 410. On this basis, the plane on which the first surface 301 is located is taken as a reference plane, on which the orthographic projection of the inner insulator 400 is rectangular, the extending direction of the long side of the rectangle is defined as the first direction X, and the ratio of the length L2 of each boss 410 to the length L1 of the inner insulator 400 is 5% to 10%, for example, 5%, 6%, 8%, 10%, or the like along the first direction X. With the above structural design, the present utility model can fix the inner insulation film 310 using the side of the boss 410 of the inner insulation 400. On the basis, the utility model can avoid too small length of the boss 410, thereby leading the inner insulating film 310 and the inner insulating member 400 to have better connection effect, further ensuring the insulating performance of the battery and enhancing the structural strength of the inner insulating member 400. Meanwhile, the utility model can avoid the excessive space inside the battery due to the overlarge length of the boss 410.

As shown in fig. 6, in an embodiment of the present utility model, the length L2 of the boss 410 may further have a 9% ratio in the length L1 of the inner insulator 400 along the first direction X.

As shown in fig. 4 and 5, in an embodiment of the present utility model, the front projection of the inner insulating member 400 is rectangular, the extending direction of the short side of the rectangle is defined as the second direction Y, the width of the boss 410 is equal to the width of the inner insulating member 400 along the second direction Y, and two sides of the boss 410 in the second direction Y are respectively aligned with two sides of the inner insulating member 400 in the second direction Y. Through the above structural design, the present utility model can further facilitate the connection of the inner insulating film 310 with the side of the boss 410.

As shown in fig. 6, in an embodiment of the present utility model, the relative arrangement direction of the cover assembly 200 and the cell assembly is defined as a third direction Z, along which the height H of the boss 410 protruding from the side surface of the inner insulator 400 facing away from the cover assembly 200 may be 3mm to 8mm, for example, 3mm, 4mm, 6mm, 8mm, etc. Since the boss 410 can form a gap with a certain height between the inner insulating member 400 and the first surface 301 of the battery cell body 300, the height H of the boss 410 is selected to be in a proper numerical range, so that the problem that the arrangement and welding of the tabs of the battery cell assembly are affected due to the fact that the height of the gap is too small can be avoided, namely, enough accommodating space is provided for accommodating the tabs by using the gap, and meanwhile, the space waste caused by the fact that the height of the gap is too large can be avoided. In some embodiments, the height H of the boss 410 may be less than 3mm, or may be greater than 8mm, such as 2.9mm, 8.1mm, etc., which is not limited to this embodiment.

As shown in fig. 6, based on the structural design that the height H of the boss 410 is 3mm to 8mm, in an embodiment of the present utility model, the height H of the boss 410 may be further 5mm along the third direction Z.

Referring to fig. 7 to 10, there is representatively illustrated in fig. 7 a schematic perspective view of an inner insulator 400 of a battery capable of embodying the principles of the present utility model in another exemplary embodiment; another angular perspective schematic view of the inner insulator 400 shown in fig. 7 is representatively illustrated in fig. 8; a top view of the inner insulator 400 shown in fig. 7 is representatively illustrated in fig. 9; a bottom view of the inner insulator 400 shown in fig. 7 is representatively illustrated in fig. 10.

As shown in fig. 7, in an embodiment of the present utility model, a side surface of the inner insulator 400 facing the cap assembly 200 may be provided with a groove 420. On this basis, the plane on which the first surface 301 of the cell body 300 is located is taken as a reference plane, and on this reference plane, the orthographic projection of the groove 420 may at least partially overlap with the orthographic projection of the boss 410. Through the above structural design, the present utility model can utilize the groove 420 to reduce the weight of the inner insulator 400, and can utilize the boss 410 to provide the groove 420 to facilitate the processing of the groove 420, and at the same time avoid the influence of the groove 420 on the structural strength of the inner insulator 400 in other areas outside the boss 410.

In one embodiment of the present utility model, as shown in fig. 7, the front projection of the groove 420 may be entirely within the front projection of the boss 410 on the reference plane.

As shown in fig. 8, based on the structural design that the inner insulating member 400 is provided with the groove 420, in an embodiment of the utility model, the boss 410 may be provided with a through hole 430, one end of the through hole 430 is opened at the bottom of the groove 420, and the other end of the through hole 430 is opened at a side surface of the boss 410 facing the cell body 300. Accordingly, the recess 420 and the inner space of the battery (e.g., the space of the side of the inner insulator 400 facing away from the cap plate assembly 200) may communicate through the through-hole 430. Through the structural design, in the process of injecting the electrolyte, the electrolyte can enter the battery through the grooves 420 and the through holes 430, so that the electrolyte can infiltrate the battery core body 300 more repeatedly, and the electrical performance of the battery is improved. In some embodiments, when the inner insulating member 400 is provided with the groove 420, the through hole 430 may not be provided, so that the groove 420 can provide the above-mentioned effect of reducing weight at least, but is not limited to this embodiment.

As shown in fig. 9 and 10, based on the structural design that the inner insulator 400 is provided with the grooves 420, in an embodiment of the present utility model, for any one boss 410, the inner insulator 400 may be provided with at least two grooves 420, for example, but not limited to, two grooves 420 shown in the drawings. Specifically, the two grooves 420 are arranged at intervals, at least one through hole 430 is formed in the boss 410 corresponding to each groove 420, and a separation rib 440 is arranged between two adjacent grooves 420. Through the above structural design, the present utility model can avoid the adverse effect on structural strength caused by the fact that the inner insulating member 400 is provided with the groove 420 with a larger size, and the separation ribs 440 separating the adjacent grooves 420 can play a role in reinforcing structural strength.

As shown in fig. 9 and 10, in an embodiment of the present utility model, for any boss 410, the ratio of the area of the orthographic projection of the recess 420 to the area of the orthographic projection of the boss 410 is 10% to 50%, for example, 10%, 20%, 30%, 40%, 50%, etc., based on the structural design of the inner insulator 400 with the recess 420. Through the structural design, the utility model can avoid the problem that the structural strength of the boss 410 is insufficient due to the fact that the area ratio of the groove 420 in the boss 410 is too large, and can also avoid the problem that the effect of reducing weight or supplying electrolyte is not obvious due to the fact that the area ratio of the groove 420 in the boss 410 is too small. In some embodiments, the ratio of the area of the orthographic projection of the groove 420 to the area of the orthographic projection of the boss 410 may be less than 10%, or may be greater than 50%, such as 9.5%, 51%, etc., which is not limited to the present embodiment.

As shown in fig. 2 and fig. 4 to 6, in an embodiment of the present utility model, a side surface of the inner insulator 400 facing away from the cover assembly 200 may be provided with two bosses 410, and the two bosses 410 are located at two ends of the inner insulator 400 along the first direction X, respectively. Through the above structural design, the fixing effect on the inner insulating film 310 can be improved by using the two bosses 410, and the connecting effect of the inner insulating film 310 and the inner insulating member 400 can be further improved.

In an embodiment of the present utility model, the battery cell assembly further includes a tab (not shown in the drawings), which is led out from the first surface 301 of the battery cell body 300 and is connected to the cap plate assembly 200. On this basis, the cover plate assembly 200 is taken as a reference plane, and the orthographic projection of the tab is not overlapped with the orthographic projection of the boss 410 on the reference plane. Through the structural design, the utility model can avoid lower utilization rate of the internal space of the battery caused by structural interference of the lug boss 410 abutting against the lug, and can avoid the lug boss 410 from scratching the lug and the internal safety risk of the battery.

It should be noted herein that the batteries shown in the drawings and described in this specification are only a few examples of the wide variety of batteries that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery shown in the drawings or described in this specification.

In summary, the battery according to the present utility model includes the inner insulating member 400, the boss 410 is disposed on the surface of the inner insulating member 400 facing the battery cell body 300, the boss 410 is located at the end of the inner insulating member 400 along the long side direction, and the length of each boss 410 along the long side direction is 5% -10% of the length of the inner insulating member 400, accordingly, a part of the inner insulating film 310 is connected to the battery cell body 300, another part is connected to the side surface of the boss 410, and the inner insulating film 310 is not disposed on the surface of the battery cell body 300 facing the cover plate assembly 200. With the above structural design, the present utility model can fix the inner insulation film 310 using the side of the boss 410 of the inner insulation 400. On the basis, the utility model can avoid too small length of the boss 410, thereby leading the inner insulating film 310 and the inner insulating member 400 to have better connection effect, further ensuring the insulating performance of the battery and enhancing the structural strength of the inner insulating member 400. Meanwhile, the utility model can avoid the excessive space inside the battery due to the overlarge length of the boss 410.

Based on the above detailed description of several exemplary embodiments of the battery set forth in the present utility model, an exemplary embodiment of the battery device set forth in the present utility model will be described below.

In one embodiment of the present utility model, the battery device according to the present utility model includes the battery according to the present utility model and described in detail in the above embodiment.

It should be noted that, the battery device provided by the utility model can be a battery pack or a battery module.

It should be noted herein that the battery devices shown in the drawings and described in this specification are only a few examples of the wide variety of battery devices that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery device shown in the drawings or described in this specification.

In summary, the battery device provided by the utility model can ensure the insulation performance of the battery by adopting the battery provided by the utility model, can enhance the structural strength of the inner insulating member, and can save the space inside the battery.

Exemplary embodiments of the battery and the battery device according to the present utility model are described and/or illustrated in detail above. Embodiments of the utility model are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the utility model has been described in terms of various specific embodiments, those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. A battery, comprising:

a housing having an opening at least one end;

the cover plate component is arranged at the opening of the shell;

the battery cell assembly comprises a battery cell body and an inner insulating film, wherein the battery cell body is arranged in the shell and provided with a first surface facing the cover plate assembly, and a part of the inner insulating film is arranged on other surfaces of the battery cell body except the first surface;

the inner insulating piece is arranged in the shell and is positioned between the cover plate assembly and the first surface of the battery cell body, a boss is arranged on one side surface of the inner insulating piece, which is opposite to the cover plate assembly, the boss is positioned at the end part of the inner insulating piece along the first direction, the boss is abutted to the first surface, and the other part of the inner insulating film is positioned on the side surface of the inner insulating piece and is connected with the side surface of the boss;

the plane where the first surface is located is taken as a reference plane, on the reference plane, the orthographic projection of the inner insulating part is rectangular, the extending direction of the long side of the rectangle is the first direction, and the length of the boss accounts for 5% -10% of the length of the inner insulating part along the first direction.

2. The battery according to claim 1, wherein an extending direction of a short side of the rectangle is a second direction along which a width of the boss is equal to a width of the inner insulator, and both side surfaces of the boss in the second direction are flush with both side surfaces of the inner insulator in the second direction, respectively.

3. The battery according to claim 1, wherein the relative arrangement direction of the cover plate assembly and the cell assembly is a third direction, and the height of the boss protruding from the side surface of the inner insulating member facing away from the cover plate assembly is 3mm to 8mm along the third direction.

4. The battery of claim 1, wherein a side surface of the inner insulator facing the cover plate assembly is provided with a groove, and an orthographic projection of the groove at least partially overlaps an orthographic projection of the boss on the reference surface.

5. The battery according to claim 4, wherein the boss is provided with a through hole, one end of the through hole is opened at the bottom of the groove, and the other end of the through hole is opened at a side surface of the boss facing the battery cell body.

6. The battery according to claim 5, wherein for one of the bosses, the inner insulator is provided with at least two of the grooves, the at least two of the grooves are arranged at intervals, the boss is provided with at least one of the through holes corresponding to each of the grooves, and a separation rib is provided between the adjacent two grooves.

7. The battery of claim 4, wherein for one of the bosses, the projected area of the recess on the reference plane is 10-50% of the projected area of the boss.

8. The battery according to any one of claims 1 to 7, wherein two bosses are provided on a side surface of the inner insulator facing away from the cap plate assembly, the two bosses being located at both end portions of the inner insulator in the first direction, respectively.

9. The battery of any one of claims 1-7, wherein the cell assembly further comprises a tab that leads from the first surface and is connected to the cover assembly; and the cover plate component is used as a reference surface, and on the reference surface, the orthographic projection of the tab is not overlapped with the orthographic projection of the boss.

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