CN219086091U

CN219086091U - Battery cell

Info

Publication number: CN219086091U
Application number: CN202320023415.5U
Authority: CN
Inventors: 刘聪毅; 齐彬伟; 杜国艺
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-05-26
Anticipated expiration: 2033-01-05

Abstract

The utility model relates to the technical field of batteries, and provides a battery, which comprises: the battery shell is provided with a first bulge protruding outwards, and the first bulge is provided with a liquid injection hole and a first pole hole; the first pole is penetrated in the first pole hole. Through be provided with annotate the liquid hole and be used for wearing to establish the first utmost point post hole of first utmost point post on battery case's first arch to can make annotate liquid hole and first utmost point post all set up on first arch, reduce or avoided annotating liquid hole and first utmost point post and occupy battery case's inner space, thereby can make battery case's inner space fully be used for placing the electric core, with this space utilization who improves the battery, thereby improved the performance of battery.

Description

Battery cell

Technical Field

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

Background

In the related art, a battery housing of a battery may be provided with a post and a liquid injection hole, and the space utilization rate of the battery is not very high due to the limitation of the positions of the post and the liquid injection hole.

Disclosure of Invention

The utility model provides a battery, which is used for improving the service performance of the battery.

The present utility model provides a battery comprising:

the battery shell is provided with a first bulge protruding outwards, and the first bulge is provided with a liquid injection hole and a first pole hole;

the first pole is penetrated in the first pole hole.

The battery of the embodiment of the utility model comprises a battery shell and a first pole, wherein the first pole is arranged on the battery shell. Through be provided with annotate the liquid hole and be used for wearing to establish the first utmost point post hole of first utmost point post on battery case's first arch to can make annotate liquid hole and first utmost point post all set up on first arch, reduce or avoided annotating liquid hole and first utmost point post and occupy battery case's inner space, thereby can make battery case's inner space fully be used for placing the electric core, with this space utilization who improves the battery, thereby improved the performance of battery.

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 showing a structure of a battery according to an exemplary embodiment;

fig. 2 is a partial schematic structure of a battery according to another exemplary embodiment.

The reference numerals are explained as follows:

10. a battery case; 11. a first protrusion; 111. a liquid injection hole; 112. a first post hole; 12. a second protrusion; 121. a second post hole; 13. a first housing member; 14. a second housing member; 20. a first pole; 30. and a second pole.

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 connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

An embodiment of the present utility model provides a battery, please refer to fig. 1 and 2, comprising: the battery case 10, the battery case 10 is provided with a first protrusion 11 protruding outwards, and the first protrusion 11 is provided with a liquid injection hole 111 and a first pole hole 112; the first pole 20, the first pole 20 is disposed through the first pole hole 112.

The battery according to one embodiment of the present utility model includes a battery case 10 and a first electrode post 20, the first electrode post 20 being disposed on the battery case 10. Through be provided with annotate liquid hole 111 and be used for wearing to establish first utmost point post hole 112 of first utmost point post 20 on the first arch 11 of battery case 10 to can make annotate liquid hole 111 and first utmost point post 20 all set up on first arch 11, reduce or avoided annotating liquid hole 111 and first utmost point post 20 and occupy the inner space of battery case 10, thereby can make the inner space of battery case 10 fully be used for placing the electric core, with this space utilization who improves the battery, thereby improved the performance of battery.

It should be noted that, the battery case 10 is provided with the first protrusion 11 protruding outwards, and the first pole 20 is disposed in the first pole hole 112 of the first protrusion 11, that is, the first pole 20 can effectively utilize the height space of the first protrusion 11, so as to ensure that the first pole 20 can have reliable overflow capability, and prevent or reduce the occupation of the first pole 20 to the internal space of the battery case 10, and the liquid injection hole 111 is also disposed on the first protrusion 11, so that not only can the space of the first protrusion 11 be fully utilized by the first pole 20 and the liquid injection hole 111, but also the height space of the first protrusion 11 can be utilized by the liquid injection hole 111, thereby increasing the circulation line of the electrolyte, and improving the liquid injection capability of the electrolyte.

The battery case 10 may be formed with a space for accommodating the battery cell, which may allow the first post 20 to reduce or reduce a high occupancy rate of the space due to the presence of the first protrusion 11, and thus, the space may be used to place the battery cell to the greatest extent, and at this time, the height of the space may be appropriately reduced compared to the battery cell of the same type in the related art, so that the placement of the battery cell may be satisfied, thereby improving the energy density of the battery cell.

In one embodiment, the battery further includes a battery cell, at least one end of the battery cell is provided with a tab, and the lead-out direction of the tab is perpendicular to the surface of the battery case 10 provided with the first protrusion 11, so that the tab and the first pole 20 can be conveniently electrically connected, the connection distance between the tab and the first pole 20 can be reduced, and the length of the tab can be properly reduced.

The tab may be led out toward the direction of the first pole 20, so that the distance between the tab and the first pole 20 may be relatively short, and the tab may be directly electrically connected to the first pole 20, or the tab may be electrically connected to the first pole 20 through the switching piece.

In one embodiment, the battery cell is abutted against the side of the battery case 10 where the first protrusion 11 is provided, so that the battery cell occupies the space formed by the battery case 10 to the greatest extent, thereby improving the space utilization of the battery case 10. The tab on the cell can extend into the first protrusion 11 to electrically connect with the first pole 20.

It should be noted that a portion of the first electrode post 20 may extend into the space formed by the battery case 10, or the first electrode posts 20 may be both received in the receiving cavities formed by the first protrusions 11, and at this time, the tabs of the battery core may extend into the receiving cavities formed by the first protrusions 11 to be connected with the first electrode posts 20.

The battery cell and the side of the battery case 10 provided with the first protrusion 11 may have a certain distance, and the tab may not extend into the accommodating cavity formed by the first protrusion 11.

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 one embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, where 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 corners between sides are not necessarily right angles, and may be arc transitions.

The battery can be a laminated battery, so that the battery is not only convenient to group, but also long in length. 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 one embodiment, the battery may be a cylindrical battery. The battery can be a winding type battery, namely, 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 are wound to obtain a winding type battery cell.

In one embodiment, as shown in fig. 1 and 2, the battery case 10 is provided with a second protrusion 12 protruding outwards, the second protrusion 12 is provided with a second post hole 121, the battery further includes a second post 30, and the second post 30 is inserted into the second post hole 121, so that the first post 20 and the second post 30 can use the height space of the first protrusion 11 and the second protrusion 12, respectively, and the electrical connection between the first post 20 and the second post 30 and the two tabs of the battery cell can be conveniently achieved.

Two tabs can be led out from one end of the battery core, the leading-out direction of the tabs can be perpendicular to the surface of the battery shell 10, on which the first protrusion 11 is arranged, namely, the two tabs can be ejection tabs, the two tabs are respectively electrically connected with the first pole 20 and the second pole 30, and the two tabs can be directly electrically connected with the first pole 20 and the second pole 30.

Or, two tabs may be led out from opposite ends of the battery core, and the leading direction of the tabs may be parallel to the surface of the battery case 10 on which the first protrusion 11 is provided, that is, the two tabs may be side-out tabs, and the two tabs are electrically connected to the first and

second posts

20 and 30, respectively, and the two tabs may be electrically connected to the first and

second posts

20 and 30 through two adapter tabs, respectively.

Or, two tabs may be led out from opposite ends of the battery core, and the leading direction of the tabs may be perpendicular to the surface of the battery case 10 on which the first protrusion 11 is provided, that is, the two tabs may be an ejecting tab and a bottom tab, and the two tabs are electrically connected with the first post 20 and the second post 30, respectively.

In one embodiment, the first protrusion 11 and the second protrusion 12 are disposed on the same surface of the battery case 10, that is, the first pole 20 and the second pole 30 may be disposed on the same surface of the battery case 10, so as to reduce the height space of the battery, thereby satisfying the use requirement of the battery.

In some embodiments, the first protrusion 11 and the second protrusion 12 may be disposed on opposite surfaces of the battery case 10, i.e., the first and

second posts

20 and 30 may be disposed on opposite surfaces of the battery case 10.

In one embodiment, the area surrounded by the circumferential outer edge of the first protrusion 11 is larger than the area surrounded by the circumferential outer edge of the second protrusion 12, so that the first protrusion 11 can be simultaneously provided with the liquid injection hole 111 and the first pole hole 112, so as to meet the installation requirements of the liquid injection and the first pole 20, and the second protrusion 12 is used for installing the second pole 30, therefore, the area of the second protrusion 12 can be relatively smaller, thereby reducing the space occupation of the second protrusion 12, and further improving the safety performance of the battery.

It should be noted that in some embodiments, it is not excluded that the number of the liquid injection holes 111 may be two, and the two liquid injection holes 111 may be disposed on the first protrusion 11 and the second protrusion 12, respectively. Alternatively, the liquid injection hole 111 may be plural, and the plural liquid injection holes 111 may be provided on at least one of the first projection 11 and the second projection 12.

In one embodiment, as shown in fig. 1, the liquid injection hole 111 is disposed at a corner position of the first protrusion 11 near the battery case 10, so that the liquid injection hole 111 may give a sufficient disposition position for the first pole hole 112 where the first pole 20 is disposed, a reliable supporting surface of the first pole 20 may be ensured, and the disposition positions of the liquid injection hole 111 and the first pole hole 112 may be reasonably arranged, so that the space of the first protrusion 11 is utilized to the greatest extent.

The corner positions of the battery case 10 may be regarded as transition position regions of both surfaces of the battery, or respective corner position regions of one surface. For example, when the battery case 10 is a rectangular body, the regions near the four corner lines of the rectangular body are corner positions of the battery case 10.

In one embodiment, the first protrusion 11 is substantially rectangular, and the liquid injection hole 111 is located in a corner area of the first protrusion 11, so that not only can the first protrusion 11 have a reliable area, but also the top surface of the rectangular structure can be reasonably utilized by the liquid injection hole 111, thereby facilitating the arrangement of the first pole 20 and further maximally utilizing the top surface space of the first protrusion 11.

The second protrusion 12 may have a substantially rectangular structure, or the first protrusion 11 and the second protrusion 12 may have a substantially cylindrical structure, for example, when the first pole 20 and the second pole 30 are both cylindrical, the cylindrical structure may also ensure the arrangement of the second pole 30.

In one embodiment, as shown in fig. 2, the liquid injection hole 111 is disposed at a corner position of the first protrusion 11 away from the battery case 10, so that the liquid injection hole 111 can give a larger disposition position for the first pole hole 112 where the first pole 20 is disposed, a reliable supporting surface of the first pole 20 can be ensured, and the disposition positions of the liquid injection hole 111 and the first pole hole 112 can be reasonably arranged, so that the space of the first protrusion 11 is utilized to the greatest extent.

When manufacturing errors, mounting errors, and measurement errors of the structure are not considered, the first protrusion 11 may have a rectangular structure, and in this case, corners of the rectangular structure may be rounded or rectangular.

In one embodiment, the distance between the first pole hole 112 and the outer edge of the first protrusion 11 near the circumferential edge of the battery case 10 is greater than the distance between the first pole hole 112 and the outer edge of the first protrusion 11 far away from the circumferential edge of the battery case 10, so that the first pole hole 112 can make room for the liquid injection hole 111, and the first pole 20 can also be disposed closer to the second pole 30, so as to facilitate connection with the tab.

The distance between the first post hole 112 and the outer edge of the first protrusion 11 near the circumferential edge of the battery case 10 is greater than the distance between the first post hole 112 and the outer edge of the first protrusion 11 far away from the circumferential edge of the battery case 10, for example, when the battery case is rectangular, the first protrusion 11 is rectangular, at this time, three sides of the first protrusion 11 may be near three sides of the battery case 10, and the other side of the first protrusion 11 may be far away from the other side of the battery case 10, at this time, the distance between the first post hole 112 and the three sides of the first protrusion 11 is greater than the distance between the first post hole 112 and the other side of the first protrusion 11, so that the first post 20 may be disposed as close to the second post 30 as possible, and the corner region of the first protrusion 11 is left for the liquid injection hole 111.

In one embodiment, as shown in fig. 1, the battery case 10 includes a first case member 13 and a second case member 14 connected, the first case member 13 is a flat plate, the second case member 14 is formed with a receiving cavity, and the first protrusion 11 is disposed on the flat plate, so that the first pole 20 can be disposed on the flat plate, not only the installation is convenient, but also a reliable supporting force can be provided for the first pole 20.

In one embodiment, it is not excluded that both the first housing part 13 and the second housing part 14 are formed with receiving cavities. Alternatively, in some embodiments, the battery housing 10 includes two plates and a housing having two open ends.

The first housing member and the second housing member may be provided independently. In some embodiments, it is not excluded that the first housing part and the second housing part may be of one unitary structure, the space accommodating the cells being formed by stamping, the subsequent closed connection being performed by welding.

An embodiment of the present utility model also provides a battery pack including the above battery.

The battery pack according to one embodiment of the present utility model includes a battery including a battery case 10 and a first post 20, the first post 20 being disposed on the battery case 10. Through be provided with annotate liquid hole 111 and be used for wearing to establish first utmost point post hole 112 of first utmost point post 20 on the first arch 11 of battery case 10 to can make annotate liquid hole 111 and first utmost point post 20 all set up on first arch 11, reduce or avoided annotating liquid hole 111 and first utmost point post 20 and occupy the inner space of battery case 10, thereby can make the inner space of battery case 10 fully be used for placing the electric core, with this space utilization who improves the battery, thereby improved the performance of group battery.

In one embodiment, the battery pack 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, the battery module may further include a bracket, and the battery may be fixed to the bracket.

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 utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model 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. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following 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

1. A battery, comprising:

the battery comprises a battery shell (10), wherein a first bulge (11) protruding outwards is arranged on the battery shell (10), and a liquid injection hole (111) and a first pole hole (112) are arranged on the first bulge (11);

the first pole (20) is arranged in the first pole hole (112) in a penetrating mode.

2. The battery of claim 1, wherein the battery is a quadrangular type battery.

3. The battery according to claim 1, characterized in that a second protrusion (12) protruding outwards is provided on the battery housing (10), a second post hole (121) is provided on the second protrusion (12), the battery further comprises a second post (30), and the second post (30) is arranged in the second post hole (121) in a penetrating manner.

4. A battery according to claim 3, characterized in that the first protrusion (11) and the second protrusion (12) are provided on the same surface of the battery housing (10).

5. A battery according to claim 3, characterized in that the area enclosed by the peripheral outer edge of the first protrusion (11) is larger than the area enclosed by the peripheral outer edge of the second protrusion (12).

6. The battery according to claim 1, characterized in that the liquid injection hole (111) is located in a corner region of the first protrusion (11).

7. The battery according to claim 6, wherein the liquid injection hole (111) is provided at a corner position of the first projection (11) near the battery case (10).

8. The battery according to claim 6, wherein the liquid filling hole (111) is provided at a corner position of the first projection (11) away from the battery case (10).

9. The battery according to claim 1, characterized in that the battery further comprises a battery cell, at least one end of the battery cell is provided with a tab, and the lead-out direction of the tab is perpendicular to the surface of the battery case (10) provided with the first protrusion (11);

wherein, the electric core is abutted with one side of the battery shell (10) provided with the first bulge (11).

10. The battery according to claim 1, characterized in that the battery housing (10) comprises a first housing part (13) and a second housing part (14) connected, the first housing part (13) being a flat plate, the second housing part (14) being formed with a receiving cavity, the first protrusion (11) being provided in the flat plate.