CN217691369U

CN217691369U - Battery with a battery cell

Info

Publication number: CN217691369U
Application number: CN202221722042.2U
Authority: CN
Inventors: 许久凌; 刘瑞见; 张璐璐
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-10-28
Anticipated expiration: 2032-06-28

Abstract

The utility model relates to a battery technology field provides a battery, include: the battery comprises a battery shell, a reinforcing part and a battery cover, wherein at least one of two opposite sides of the battery shell is provided with the reinforcing part, and the extending direction of the reinforcing part is parallel to the height direction of the battery shell; the battery cell is arranged in the battery shell. The reinforcing parts are arranged on the two opposite sides of the battery shell, and the length direction of the reinforcing parts is parallel to the height direction of the battery shell, so that the reinforcing parts can be used for reinforcing the structure of the battery shell, the probability of deformation of the battery shell is reduced, the relative fixation of the positions between the battery shell and the battery core can be ensured, the possibility of electric connection between the battery shell and the battery core is reduced, and the safety use performance of the battery is improved.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

In the related art, the battery core of the battery is arranged in the battery shell, and due to the structural limitation of the battery shell, the battery shell is easy to deform under certain conditions, so that the risk of insulation failure between the battery core and the battery shell is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

the battery comprises a battery shell, wherein at least one of two opposite sides of the battery shell is provided with a reinforcing part, and the extending direction of the reinforcing part is parallel to the height direction of the battery shell;

the battery cell is arranged in the battery shell.

The utility model discloses the battery includes battery case and electric core, and electric core sets up in the battery case. At least one of two opposite sides of the battery shell is provided with the reinforcing part, and the extending direction of the reinforcing part is parallel to the height direction of the battery shell, so that the reinforcing part can strengthen the structure of the battery shell, the probability of deformation of the battery shell is reduced, the relative fixation of the position between the battery shell and the battery cell can be ensured, the possibility of electric connection between the battery shell and the battery cell is reduced, and the safety use performance of the battery is improved.

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 be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

fig. 2 is a schematic view showing the structure of a battery case of a battery according to a first exemplary embodiment;

fig. 3 is a schematic diagram showing the structure of a battery case of a battery according to a second exemplary embodiment;

fig. 4 is a schematic diagram showing the structure of a battery case of a battery according to a second exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a reinforcing portion; 12. a first surface; 13. a second surface; 20. an electric core; 21. a cell main body; 22. the pole ear 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 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, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 4, the battery includes: a battery case 10, at least one of two opposite sides of the battery case 10 is provided with a reinforcing part 11, and the extending direction of the reinforcing part 11 is parallel to the height direction of the battery case 10; and the battery core 20 is arranged in the battery shell 10.

The battery of an embodiment of the present invention includes a battery case 10 and an electric core 20, and the electric core 20 is disposed in the battery case 10. By arranging the reinforcing part 11 on at least one of the two opposite sides of the battery shell 10 and enabling the extending direction of the reinforcing part 11 to be parallel to the height direction of the battery shell 10, the reinforcing part 11 can strengthen the structure of the battery shell 10, the probability of deformation of the battery shell 10 is reduced, the relative fixation of the position between the battery shell 10 and the battery core 20 can be ensured, the possibility of electrical connection between the battery shell 10 and the battery core 20 is reduced, and the safety use performance of the battery is improved.

It should be noted that, the reinforcing portion 11 is disposed on the battery case 10, so that the structural strength of the battery case 10 itself can be increased, and even if the battery case 10 deforms during use or during installation of the battery, due to the existence of the reinforcing portion 11, the strength of the battery case 10 itself is strong, so that the deformation amount is relatively small, and in some cases, the battery case 10 is not basically deformed, so that the position between the battery case 10 and the battery core 20 can be ensured to be relatively fixed, further, the distance between the tab portion 22 of the battery core 20 and the battery case 10 can be ensured to be relatively fixed, so that the probability that the tab portion 22 contacts with the battery case 10 is reduced, and reliable insulation between the tab portion 22 and the battery case 10 can be ensured.

Use the battery as an example when the shaping, the battery is when carrying out the injection of electrolyte, need take out the negative pressure to battery case 10 inside, this process can make battery case 10 at least part inwards sunken, but in this embodiment, through be provided with rib 11 on battery case 10, the certain degree can reduce the inside sunken volume of battery case 10 to can avoid battery case 10 to be close to utmost point ear 22, consequently can guarantee reliable insulating between utmost point ear 22 and the battery case 10, with this security performance who improves the battery.

Referring to fig. 1, a height direction of the battery case 10 is a, the height direction of the battery case 10 may be parallel to a thickness direction of the battery cell 20, and the thickness direction of the battery cell 20 is the thickness direction of the battery cell 20 after stacking a plurality of pole pieces. The extending direction of the reinforcing portion 11 may be the longitudinal direction of the reinforcing portion 11.

In one embodiment, the reinforcing portion 11 is a reinforcing rib, and the reinforcing portion 11 may be a substantially rectangular reinforcing rib, which not only has a simple structure, but also ensures that the reinforcing rib effectively improves the structural strength of the battery case 10, and ensures that the length direction of the reinforcing portion 11 is parallel to the height direction of the battery case 10.

It should be noted that the length direction of the reinforcing part 11 can be considered as the extending direction of the reinforcing part 11 with longer dimension, the height direction of the battery case 10 can be considered as the thickness direction of the battery, after the battery is horizontally placed, the length direction of the reinforcing part 11 can be considered as the vertical direction, and the reinforcing part 11 is a reinforcing rib, the length direction of the reinforcing rib is parallel to the height direction of the battery case 10, so that the probability of deformation of the battery case 10 can be reduced, and the safety performance of the battery can be improved.

In one embodiment, the reinforcing part 11 is separately provided to the battery case 10, that is, the reinforcing part 11 is independently provided to the battery case 10 without crossing, connecting, etc. with other structures provided to the battery case 10, thereby simplifying the structure of the battery case 10 and facilitating the molding of the reinforcing part 11, thereby improving the manufacturing efficiency of the battery.

It should be noted that, the reinforcing portion 11 is provided in isolation to the battery case 10, for example, if only another reinforcing structure can be provided on the battery case 10, but the reinforcing structure cannot be connected to the reinforcing portion 11, so that the reinforcing portion 11 is provided in isolation to the battery case 10.

In one embodiment, the reinforcing part 11 is disposed outside the battery case 10, so that the battery case 10 is reinforced and the internal space of the battery case 10 is not occupied, thereby improving the space utilization rate inside the battery.

In one embodiment, the reinforcing part 11 is disposed inside the battery case 10, so as to reinforce the battery case 10, and the reinforcing part 11 is prevented from being exposed to affect the external insulation treatment of the battery case 10 or the subsequent grouping of the battery, and the reinforcing part 11 disposed inside the battery case 10 may also be used for limiting the position inside the battery case 10, for example, the reinforcing part 11 may be used for limiting the position of the cell main body 21.

In one embodiment, as shown in fig. 2, the reinforcing part 11 is provided in plurality, and the plurality of reinforcing parts 11 are disposed at intervals along the length direction of the battery case 10, so that the structural stability of the battery case 10 in the length direction can be ensured, and the deformation of the battery case 10 in the length direction can be avoided.

It should be noted that the longitudinal dimension of the battery case 10 is relatively large, and therefore, the structure of the battery case 10 in the longitudinal direction is more easily deformed, and the structural stability of the battery case 10 in the longitudinal direction can be reliably enhanced by providing the plurality of reinforcing portions 11 at intervals in the longitudinal direction of the battery case 10.

In one embodiment, as shown in fig. 3, the reinforcing part 11 is provided in plurality, and the plurality of reinforcing parts 11 are disposed at intervals in the width direction of the battery case 10, so that structural stability in the width direction of the battery case 10 can be ensured and deformation in the width direction of the battery case 10 can be prevented.

Considering that the lug part 22 of the battery cell 20 may extend toward the width direction of the battery case 10, and therefore, if a large deformation occurs in the width direction of the battery case 10, a distance between the lug part 22 and the battery case 10 may be caused to become small, thereby posing an insulation risk, the structural stability in the width direction of the battery case 10 may be reliably enhanced by providing the plurality of reinforcing parts 11 at intervals in the width direction of the battery case 10.

In one embodiment, as shown in fig. 4, the reinforcing part 11 is provided in plurality, the plurality of reinforcing parts 11 are arranged at intervals in the width direction of the battery case 10, and the plurality of reinforcing parts 11 are arranged at intervals in the length direction of the battery case 10, thereby reinforcing the strength of the battery case 10 as a whole.

The battery case 10 shown in fig. 2 to 4 may be considered as a part of the battery case.

In one embodiment, the reinforcing part 11 is disposed in the middle region of the battery case 10, and further, the reinforcing part 11 is disposed in the middle region of the surface of the battery case 10, which not only facilitates the formation of the reinforcing part 11, but also avoids the problem that the reinforcing part 11 intersects with the edge region of the battery case 10 to increase the overall weight of the battery.

The middle region of the surface of the battery case 10 may be regarded as a region other than the circumferential edge of the surface of the battery case 10, that is, the reinforcing portion 11 does not intersect the circumferential edge of the surface of the battery case 10. For example, the reinforcement 11 is provided in the middle region of the second surface 13, in which case the reinforcement 11 does not intersect the circumferential edge of the second surface 13.

In one embodiment, the thickness of the battery case 10 is not more than 0.5mm, that is, the thickness of the battery case 10 is small, the battery case 10 is more easily deformed, so that the deformation and the like of the battery case 10 can be prevented by providing the reinforcing part 11 on the battery case 10.

The thickness of the battery shell 10 is relatively small, so that when negative pressure is pumped out, the battery shell 10 is more prone to form a concave problem, and therefore, the arrangement of the reinforcing part 11 can effectively ensure the insulation arrangement between the battery shell 10 and the battery core 20.

The thickness of the battery case 10 may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm, etc.

In one embodiment, the reinforcing part 11 is integrally formed with at least a portion of the battery case 10, thereby improving the molding efficiency of the battery case 10, simplifying the manufacturing process of the battery case 10, and enhancing the structural strength of the battery case 10.

The reinforcement 11 may be formed by a punching process. For example, a projection may be punched on the battery case 10 as the reinforcing portion 11.

In one embodiment, the reinforcing part 11 and the battery case 10 may be a separate structure, and the reinforcing part 11 may be welded to the battery case 10, or the reinforcing part 11 may be bonded to the battery case 10.

In one embodiment, as shown in fig. 2 to 4, the battery case 10 includes two opposite first surfaces 12 and four second surfaces 13 disposed around the first surfaces 12, the first surfaces 12 having an area larger than that of the second surfaces 13; wherein, reinforcing part 11 sets up in second surface 13, and reinforcing part 11 can not occupy too big space to guarantee that the whole volume of battery can not be too big, with this guarantee that battery case 10 inner space can high-efficiently be utilized, and reinforcing part 11 can realize the reliable insulation protection between antipodal ear 22 and the battery case 10.

It should be noted that, as shown in fig. 2 to 4, the inner surface of the battery case 10 includes two opposite first surfaces 12 and four second surfaces 13 disposed around the first surfaces 12, the two opposite first surfaces 12 are large surfaces of the battery case 10, the four second surfaces 13 are small surfaces of the battery case 10, the four second surfaces 13 include two pairs of small surfaces, that is, a first pair of small surfaces extending in the length direction of the battery case 10 and a second pair of small surfaces extending in the width direction of the battery case 10, and the area of the first pair of small surfaces is larger than that of the second pair of small surfaces, but smaller than that of the large surfaces.

In one embodiment, as shown in fig. 3, the battery cell 20 includes a cell main body 21 and a tab portion 22, the tab portion 22 extends from a side surface of the cell main body 21 and extends toward the reinforcement portion 11, that is, a side of the battery case 10 facing the tab portion 22 can ensure sufficient structural strength due to the presence of the reinforcement portion 11, so as to avoid a large amount of deformation and reduce a distance between the battery case 10 and the tab portion 22, thereby ensuring reliable insulation between the battery case 10 and the tab portion 22.

It should be noted that the battery cell 20 may include a battery cell main body 21 and two tab portions 22, where the two tab portions 22 may be located on two opposite sides of the battery cell main body 21, one tab portion 22 extends from one side surface of the battery cell main body 21 along a first direction, the other tab portion 22 extends from the other side surface of the battery cell main body 21 along a second direction, the first direction and the second direction are opposite, and the two tab portions 22 may extend toward the two reinforcing portions 11 respectively.

The battery core main body 21 includes more than two pole pieces, the tab portion 22 includes more than two single-piece tabs, the single-piece tabs extend from the corresponding pole pieces respectively, the width of the single-piece tabs can be smaller than that of the pole pieces, and a plurality of single-piece tabs are stacked to form the tab portions and connected with the electrode leading-out structure. Wherein the one-piece tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, nickel, or the like.

In one embodiment, the battery can be a laminated battery, which is convenient for grouping and can be processed to obtain a battery with a longer length.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The cell refers to a unit formed by winding or laminating a stacking part, wherein the stacking part comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged.

Specifically, the battery cell 20 is a laminated battery cell, and the battery cell 20 has a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm disposed between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Optionally, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the battery further includes a pole assembly, the pole assembly is disposed in the battery housing 10, the pole ears 22 can be connected to the pole assembly, the number of the pole assemblies is two, the two pole assemblies are respectively a positive pole assembly and a negative pole assembly, each pole assembly can include two poles for increasing the overcurrent capacity of the battery, the number of the pole ears is also two, the two pole ears are respectively a positive pole ear and a negative pole ear, the positive pole assembly is connected to the positive pole ear, and the negative pole assembly is connected to the negative pole ear.

The battery case 10 may be made of stainless steel or aluminum, and has good corrosion resistance and sufficient strength. The thickness of the battery case 10 is not more than 0.5mm, so that the weight of the battery case 10 can be reduced, thereby improving the energy density of the battery. The thickness of the battery case 10 may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, or the like.

An embodiment of the utility model also provides a battery pack, the battery pack includes above-mentioned battery.

The battery of the battery pack according to an embodiment of the present invention includes a battery case 10 and a battery cell 20, and the battery cell 20 is disposed in the battery case 10. By arranging the reinforcing part 11 on at least one of the two opposite sides of the battery shell 10 and enabling the extending direction of the reinforcing part 11 to be parallel to the height direction of the battery shell 10, the reinforcing part 11 can strengthen the structure of the battery shell 10, the probability of deformation of the battery shell 10 is reduced, the relative fixation of the position between the battery shell 10 and the battery cell 20 can be ensured, the possibility of electrical connection between the battery shell 10 and the battery cell 20 is reduced, and the safety use performance of the battery pack is improved.

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 module may further include an end plate and a side plate for fixing the plurality of batteries.

It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention 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 example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

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

Claims

1. A battery, comprising:

the battery pack comprises a battery shell (10), wherein at least one of two opposite sides of the battery shell (10) is provided with a reinforcing part (11), and the extending direction of the reinforcing part (11) is parallel to the height direction of the battery shell (10);

a battery cell (20), the battery cell (20) disposed within the battery housing (10).

2. The battery according to claim 1, wherein the reinforcing portion (11) is provided in isolation to the battery case (10).

3. The battery according to claim 1 or 2, wherein the reinforcement portion (11) is provided inside the battery case (10).

4. The battery according to claim 1 or 2, wherein the reinforcing portion (11) is plural, plural reinforcing portions (11) are provided at intervals in a length direction of the battery case (10), and/or plural reinforcing portions (11) are provided at intervals in a width direction of the battery case (10).

5. The battery according to claim 1 or 2, wherein the reinforcement (11) is provided at a middle region of the surface of the battery case (10).

6. The battery according to claim 1 or 2, wherein the thickness of the battery case (10) is not more than 0.5mm.

7. The battery according to claim 6, wherein the reinforcement (11) is of an integrally formed structure with at least a portion of the battery case (10).

8. The battery according to claim 1, wherein the battery case (10) comprises two opposing first surfaces (12) and four second surfaces (13) disposed around the first surfaces (12), the first surfaces (12) having an area greater than the second surfaces (13);

wherein the reinforcement (11) is provided to the second surface (13).

9. The battery according to claim 1 or 2, wherein the reinforcement (11) is a reinforcing rib.

10. The battery according to claim 1 or 2, characterized in that the cell (20) comprises a cell main body (21) and a tab portion (22), and the tab portion (22) extends from a side surface of the cell main body (21) and extends toward the reinforcement portion (11).