CN220042207U - 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, two electric cores and two cover plate components, the shell is provided with openings at two ends along a first direction, the two electric cores are accommodated in the shell and are arranged along a second direction perpendicular to the first direction, each electric core is provided with a top surface, a bottom surface, two first side surfaces and two second side surfaces, the two first side surfaces are spaced along the second direction and perpendicular to the second direction, the two second side surfaces are spaced along the first direction and perpendicular to the first direction, two lugs of the electric cores are respectively positioned at the two second side surfaces, the two cover plate components are respectively arranged at two ends of the shell and are provided with pole components; at least one end along the first direction, each tab of the two battery cells is connected to the pole assembly.

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 the existing battery, when the battery is out from the side of the lug, and the battery shell contains the double battery cells, two lugs on the same side of the double battery cells are connected together and are commonly connected to the pole column component of the cover plate component, and due to the fact that the difficulty of folding the two lugs on the same side is large, obvious fault phenomenon exists after the two lugs are connected together, and the connection effect of the lug and the pole column component is affected.

Disclosure of Invention

The present utility model is directed to a battery with a better connection effect between a tab and a post assembly of a dual-cell side-out.

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

according to an aspect of the present utility model, there is provided a battery including a case having both ends open in a first direction, two battery cells accommodated in the case and arranged in a second direction perpendicular to the first direction, each battery cell having a top surface, a bottom surface, and two first side surfaces and two second side surfaces connected between the top surface and the bottom surface, the two first side surfaces being spaced apart in the second direction and perpendicular to the second direction, the two second side surfaces being spaced apart in the first direction and perpendicular to the first direction, two tabs of the battery cells being respectively located at the two second side surfaces, the two cover plate assemblies being respectively disposed at both ends open of the case, the cover plate assemblies being provided with tab assemblies; at least one end along the first direction, each tab of the two battery cells is connected to the pole assembly.

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 two battery cells accommodated in a shell, wherein two electrode lugs of the battery cells are respectively led out from two ends of the battery cells along a first direction, and at least one end of the battery cells along the first direction, one electrode lug of each of the two battery cells is respectively connected with the electrode post assembly. Through the structural design, the utility model can avoid the fault phenomenon caused by higher folding difficulty when two lugs on the same side of two battery cells are connected together, and ensure the good welding effect of the lugs and the pole assembly. In addition, as the two lugs on the same side of the two battery cores are not connected together, the utility model can avoid larger thickness caused by the connection of the two lugs together, thereby avoiding larger internal resistance of contact between the lug and the pole assembly caused by larger thickness and ensuring the safety performance of the battery.

Another main object of the present utility model is to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a battery device employing the above-mentioned 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 battery provided by the utility model can avoid ensuring a good welding effect of the tab and the pole assembly, and simultaneously ensure the safety performance of the battery.

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 perspective view of the battery cell shown in fig. 2;

fig. 4 is a side view of the cell shown in fig. 3;

fig. 5 is a side view of a cell of a battery shown according to another exemplary embodiment;

fig. 6 is an exploded perspective view of a battery according to still another exemplary embodiment;

fig. 7 is a partial enlarged view of a cell of a battery according to still another exemplary embodiment.

The reference numerals are explained as follows:

100. a housing;

200. a battery cell;

201. a top surface;

202. a first side;

203. a second side;

210. a tab;

220. a first adhesive tape;

300. a cover plate assembly;

310. a pole assembly;

320. a liquid injection hole;

D. spacing;

o, geometric center;

W1-W3. width;

x, a first direction;

y. second 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, two battery cells 200, and two cap assemblies 300. Referring to fig. 2-4 in combination, an exploded perspective view of the battery shown in fig. 1 is representatively illustrated in fig. 2, wherein the exploded structure is specifically illustrated after the cover assembly 300 is flipped over by about 90 ° and the connection of the pole assembly 310 to the tab 210 is broken; a schematic perspective view of the cell 200 is representatively illustrated in fig. 3; a side view of the cell 200 is representatively illustrated in fig. 4. 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 4, in an embodiment of the present utility model, the housing 100 is opened at both ends in the first direction X. The two battery cells 200 are accommodated in the case 100 and are arranged along a second direction Y perpendicular to the first direction X. Each cell 200 has a top surface 201, a bottom surface, and two first side surfaces 202 and two second side surfaces 203 connected between the top surface 201 and the bottom surface, the two first side surfaces 202 being spaced apart along and perpendicular to the second direction Y, the two second side surfaces 203 being spaced apart along and perpendicular to the first direction X. The two tabs 210 of the battery cell 200 are respectively located on the two second side surfaces 203. The two cover plate assemblies 300 are respectively disposed at two ends of the housing 100, and the cover plate assemblies 300 are provided with pole assemblies 310. On the basis, at least one end along the first direction X, each tab 210 of the two battery cells 200 is connected to the pole assembly 310, and the two tabs 210 are relatively independent and have no connection relationship. The "one tab 210" refers to a tab of the battery cell 200, and since the battery cell 200 generally has a plurality of electrode sheets, the tab 210 can be understood as "one tab 200" formed by integrating and communicating a plurality of electrode tabs of a plurality of electrode sheets of the battery cell 200. Through the structural design, the utility model can avoid the fault phenomenon caused by higher folding difficulty when the two lugs 210 on the same side of the two battery cells 200 are connected together, and ensure the good welding effect of the lugs 210 and the pole assembly 310. In addition, since the two tabs 210 on the same side of the two battery cells 200 are not connected together, the utility model can avoid the larger thickness of the two tabs 210 due to the connection together, thereby avoiding the larger internal resistance of the contact between the tab 210 and the pole assembly 310 caused by the larger thickness and ensuring the safety performance of the battery.

It should be noted that, in the embodiments shown in fig. 1 to 4, two battery cells 200 are taken as an example for illustration, and in some embodiments of the present utility model, the battery may include three or more battery cells 200. On this basis, in three or more battery cells 200, the tabs 210 of at least two battery cells 200 may be first connected together and commonly connected to the post assembly 310, which is not limited to the above embodiment.

In an embodiment of the present utility model, only one tab 210 of each of the two battery cells 200 along the first direction X is connected to the pole assembly 310. In other words, at one end along the first direction X, the two tabs 210 of the two electric cores 200 are respectively connected to the pole assemblies 310, and at the other end along the first direction X, the other two tabs 210 of the two electric cores 200 are connected together and are commonly connected to the other pole assembly 310. In some embodiments, each tab 210 at two ends of the two battery cells 200 along the first direction X is connected to the pole assembly 310, in other words, any two tabs 210 at the same end along the first direction X are connected to the corresponding pole assembly 310, which is not limited to the above embodiments.

Based on the structural design that only one tab 210 of each of the two battery cells 200 is connected to the pole assembly 310 along the first direction X, in an embodiment of the utility model, taking the two tabs 210 of each battery cell 200 as the positive tab 210 and the negative tab 210 respectively as an example, the two positive tabs 210 of the two battery cells 200 are located at the same end along the first direction X, and the two negative tabs 210 of the two battery cells 200 are located at the other same end along the first direction X. On this basis, the two positive tabs 210 of the two cells 200 may be connected to the post assemblies 310 (i.e., the positive posts of the battery), respectively. That is, the two negative tabs 210 of two cells 200 may be connected together and commonly connected to another post assembly 310 (i.e., a negative assembly). Because the aluminum foils of the positive electrode lugs 210 are thicker than the copper foils of the negative electrode lugs 210 and are not easy to bend, and because the conductivity of the aluminum is poorer than that of the copper, the aluminum foils of the two positive electrode lugs 210 are respectively connected with the pole component 310 relatively independently, so that the greater processing difficulty caused when the aluminum foils with larger thickness are bent and folded together is avoided, the manufacturing difficulty is reduced, and the production efficiency is improved.

As shown in fig. 4, in an embodiment of the present utility model, for two tabs 210 located at the same end along the first direction X and respectively connected to the tab assembly 310, the orthographic projections of the two tabs 210 on the second side 203 may be staggered along the second direction Y, and the orthographic projections of the two tabs 210 on the second side 203 may also be staggered along the height direction of the battery. On this basis, the two tabs 210 may be further arranged at intervals in the second direction Y, and the two tabs 210 may be further arranged at intervals in the height direction of the battery. Through the structural design, the utility model can realize the dislocation welding of the two lugs 210 and the pole assembly 310, thereby further avoiding the mutual influence when the two lugs 210 are respectively welded with the pole assembly 310 and further improving the welding effect of the lugs 210 and the pole assembly 310.

As shown in fig. 4, based on the structural design that the orthographic projections of the two tabs 210 on the second side 203 are staggered along the second direction Y, in an embodiment of the present utility model, in the staggered direction of the two tabs 210, for example, the second direction Y shown in the drawings, the distance D between the two tabs 210 may be 3mm to 30mm, for example, 3mm, 5mm, 25mm, 30mm, etc. Through the structural design, the utility model can avoid the defect that the space D between the two lugs 210 is too small to cause the staggered implementation of the lugs 210 to be not obvious enough, and can avoid the space waste and the increase of the arrangement difficulty of the lugs 210 caused by the too large space D between the two lugs 210.

As shown in fig. 4, based on the structural design that the distance D between the two tabs 210 is 3mm to 30mm, in an embodiment of the present utility model, the distance D between the two tabs 210 may be further 10mm to 20mm, for example, 10mm, 12mm, 15mm, 20mm, etc.

As shown in fig. 4, based on the structural design that the orthographic projections of the two tabs 210 on the second side 203 are staggered along the second direction Y, in an embodiment of the present utility model, the orthographic projections of the two tabs 210 on the second side 203 may be symmetrically arranged with the geometric center O of the second side 203 as a center. Through the structural design, the two lugs 210 on the same side of the two battery cores 200 can be arranged more uniformly and reasonably, the two lugs 210 are convenient to be connected with the pole assembly 310 respectively, larger welding operation space is reserved, and the processing and manufacturing are convenient.

Referring to fig. 5, a side view of a battery cell in another exemplary embodiment that can embody principles of the present utility model is representatively illustrated in fig. 5.

As shown in fig. 5, in an embodiment of the present utility model, for two tabs 210 located at the same end along the first direction X and respectively connected to the tab assemblies 310, the orthographic projections of the two tabs 210 on the second side 203 may be staggered only along the second direction Y, and the two tabs 210 are staggered only in the height direction of the battery without being spaced apart by a pitch.

Referring to fig. 6, there is representatively illustrated an exploded perspective view of a battery embodying principles of the present utility model in another exemplary embodiment, particularly illustrating an exploded configuration after the cover assembly 300 is flipped over about 90 ° and the tab assembly 310 is disconnected from the tab 210.

As shown in fig. 6, in an embodiment of the present utility model, at least one cover assembly 300 may be provided with two relatively independent pole assemblies 310, and two tabs 210 located at the same end along the first direction X are respectively connected to the two pole assemblies 310. In other words, when only two tabs 210 of one side of two battery cells 200 are respectively connected to the pole assemblies 310, two relatively independent pole assemblies 310 may be disposed on one cover assembly 300 corresponding to the side. Furthermore, when the tabs 210 on both sides of the two electrical cores 200 are respectively connected to the corresponding pole assemblies 310, two relatively independent pole assemblies 310 may be respectively disposed on the two cover plate assemblies 300. Accordingly, in the design process of the present utility model, for the pole assembly 310, not only overcurrent but also heat dissipation needs to be considered, the large surface of the pole assembly 310 is connected with the busbar, and the peripheral side of the pole assembly 310 can be used as a heat dissipation path, so that the heat dissipation path can be increased by adopting the structural design of arranging the bipolar pole with the single cover plate assembly 300, and heat dissipation is facilitated.

As shown in fig. 4, in an embodiment of the present utility model, at least one cover plate assembly 300 may be provided with a liquid injection hole 320, and an orthographic projection of the liquid injection hole 320 on the adjacent second side surface 203 may be located within a range of an orthographic projection of the tab 210 on the side on the second side surface 203. Through the above structural design, the electrode lug 210 can be utilized to shield the body (such as the electrode plate) of the part of the battery cell 200 corresponding to the liquid injection hole 320, so that the electrode plate is prevented from being damaged due to the fact that the position of the battery cell 200 is directly flushed by electrolyte in the liquid injection process of the battery, and the electric performance of the battery is improved.

Referring to fig. 7, a partial enlarged view of a battery cell 200 in another exemplary embodiment of a battery capable of embodying the principles of the present utility model is representatively illustrated in fig. 7.

As shown in fig. 7, in an embodiment of the present utility model, each of the battery cells 200 may further include a first adhesive tape 220 and a second adhesive tape (not shown in the drawings), one end of the first adhesive tape 220 is adhered to the first side 202 of the battery cell 200, the other end of the first adhesive tape 220 is adhered to a portion of the tab 210 connected to the battery cell 200 (i.e., a "root" of the tab 210), both sides of the tab 210 along the second direction Y may be respectively provided with the first adhesive tape 220, and the first adhesive tape 220 does not cover the area where the tab 210 is connected to the tab assembly 310. The second tape is adhered to the connection region of the tab and the tab post assembly 310. Through the above structural design, the utility model can utilize the first adhesive tape 220 and the second adhesive tape to respectively realize insulation protection of the root of the tab 210 and the connection area of the tab 210 and the pole assembly 310, thereby further improving the insulation performance of the battery.

As shown in fig. 7, based on the structural design that the battery cell 200 includes the first adhesive tape 220, in an embodiment of the present utility model, the width W1 of the first adhesive tape 220 may be greater than the width W2 of the tab 210 along the height direction of the battery, so that the tab 210 is completely located within the range of the first adhesive tape 220 in the height direction. Through the above structural design, the insulation effect of the first adhesive tape 220 on the root of the tab 210 can be further optimized.

As shown in fig. 7, based on the structural design that the battery cell 200 includes the first adhesive tape 220, in an embodiment of the present utility model, along the first direction X, the width W3 of the portion of the first adhesive tape 220 adhered to the first side 202 may be greater than or equal to 3mm, so as to improve the adhesion performance between the first adhesive tape 220 and the first side 202, and prevent edge lifting during use.

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 two battery cells 200 accommodated in the housing 100, two tabs 210 of the battery cells 200 are led out from two ends of the battery cells 200 along the first direction X, and at least one end of the battery cells 200 along the first direction X, each tab 210 of the two battery cells 200 is connected to the pole assembly 310. Through the structural design, the utility model can avoid the fault phenomenon caused by higher folding difficulty when the two lugs 210 on the same side of the two battery cells 200 are connected together, and ensure the good welding effect of the lugs 210 and the pole assembly 310. In addition, since the two tabs 210 on the same side of the two battery cells 200 are not connected together, the utility model can avoid the larger thickness of the two tabs 210 due to the connection together, thereby avoiding the larger internal resistance of the contact between the tab 210 and the pole assembly 310 caused by the larger thickness and ensuring the safety performance of the battery.

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. The battery device provided by the utility model can be a battery module or a battery pack.

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, by adopting the battery device provided by the utility model, the good welding effect of the tab and the pole assembly can be avoided and the safety performance of the battery can be ensured.

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 (11)

1. The battery is characterized by comprising a shell, two electric cores and two cover plate components, wherein the shell is provided with openings at two ends along a first direction, the two electric cores are accommodated in the shell and are arranged along a second direction perpendicular to the first direction, each electric core is provided with a top surface, a bottom surface and two first side surfaces and two second side surfaces which are connected between the top surface and the bottom surface, the two first side surfaces are spaced along the second direction and perpendicular to the second direction, the two second side surfaces are spaced along the first direction and perpendicular to the first direction, the two lugs of the electric cores are respectively positioned at the two second side surfaces, the two cover plate components are respectively arranged at the openings at two ends of the shell, and the cover plate components are provided with pole components; at least one end along the first direction, each tab of the two battery cells is connected to the pole assembly.

2. The battery of claim 1, wherein two of said tabs are connected to said post assembly at one end in said first direction and two of said tabs are connected together and commonly connected to another of said post assemblies at the other end in said first direction.

3. The battery according to claim 2, wherein the two tabs of each cell are a positive tab and a negative tab, respectively, the two positive tabs being located at the same end in the first direction, and the two negative tabs being located at the other same end in the first direction; the two positive lugs are respectively connected to the pole column assembly.

4. The battery of claim 1, wherein any two of the tabs located at the same end in the first direction are each connected to a corresponding one of the pole assemblies.

5. The battery of claim 1, wherein for two tabs located at the same end in the first direction and respectively connected to the post assembly, the orthographic projections of the two tabs on the second side are staggered along the second direction.

6. The battery according to claim 5, wherein:

in the second direction, the distance between the two lugs is 3 mm-30 mm; and/or

For the two tabs located at the same end along the first direction and respectively connected to the pole assembly, the orthographic projections of the two tabs on the second side face are staggered along the height direction of the battery.

7. The battery according to any one of claims 1 to 6, wherein at least one of the cover plate assemblies is provided with two relatively independent tab assemblies, and two tabs located at the same end in the first direction are respectively connected to the two tab assemblies.

8. The battery of any one of claims 1-6, wherein at least one of the cover plate assemblies is provided with a fill hole, an orthographic projection of the fill hole on the adjacent second side being within an orthographic projection of the tab.

9. The battery of any one of claims 1-6, wherein each of the cells further comprises a first adhesive tape having one end adhered to the first side of the cell and the other end adhered to the portion of the tab connected to the cell, and wherein the first adhesive tape does not cover the area of the tab connected to the tab assembly, and a second adhesive tape adhered to the connection area of the tab and the tab assembly.

10. The battery according to claim 9, wherein:

the width of the first adhesive tape is larger than that of the tab along the height direction of the battery, so that the tab is completely positioned in the range of the first adhesive tape along the height direction; and/or

The width of the portion of the first tape adhered to the first side face is 3mm or more along the first direction.

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