CN217606914U

CN217606914U - Battery case and battery

Info

Publication number: CN217606914U
Application number: CN202221554281.1U
Authority: CN
Inventors: 李峥; 冯玉川; 陈凯; 何泓材
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-10-18
Anticipated expiration: 2032-06-21

Abstract

The utility model relates to a battery field especially relates to a battery case and battery. Wherein, the battery includes electric core and battery case, and electric core places in the battery case, and the battery case includes apron and battery case, and battery case's top sets up uncovered, and the apron can be covered and close to fix in uncovered department. And battery case includes two pairs of casing lateral walls that set up relatively, and wherein a pair of casing lateral wall is close to open one and all is provided with the bellying, and another pair of casing lateral wall is close to open one and all is provided with step portion, and the bottom of apron can all be in the internal surface of battery case with the step face butt of step portion, bellying and step portion. From this, at the closing cap in-process, the fit clearance that laser passed between battery case and apron just can receive blockking of step portion or bellying, and can not directly penetrate into the inside of battery case and then burn electric core, has guaranteed the security in the battery production process.

Description

Battery case and battery

Technical Field

The utility model relates to a battery field especially relates to a battery case and battery.

Background

In order to save welding time and enable a welding line to be formed at one time, the battery case is mostly sealed in a top welding mode in the prior art, namely, the battery case is sealed by laser which travels for a circle along the connecting seam between the edge of the cover plate and the battery case. Due to the clearance fit between the cover plate and at least part of the side wall of the battery case, in the process of sealing the cover, laser penetrates through the fit clearance between the battery case and the cover plate and is emitted into the battery case, and then the battery core in the battery case is directly burnt.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery case and battery to solve and to pass the fit clearance between battery case and apron at closing cap in-process laser and to kick into the inside of battery case, and then the problem of the inside electric core of battery case of directly burning.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery case, comprising: a cover plate; battery case, battery case's top is provided with uncovered, the apron can be covered to close to be fixed uncovered department, battery case includes the casing lateral wall of two pairs of relative settings, and one of them is right the casing lateral wall is close to all be provided with the bellying on the open one end, another is right the casing lateral wall is close to uncovered one is served and all is provided with step portion, just the bottom of apron can with the step face butt of step portion, the bellying with step portion all is located battery case's internal surface.

Preferably, the two pairs of shell side walls are a pair of first shell side walls and a pair of second shell side walls respectively, the first shell side walls with apron clearance fit, the second shell side walls with apron interference fit, the bellying sets up on the first shell side walls, the step portion sets up on the second shell side walls.

Preferably, at least one of the side walls of the case is further provided with a groove, and the groove is located on the outer surface of the battery case.

Preferably, the groove and the protrusion are disposed on the same side wall of the housing, and the position of the groove corresponds to that of the protrusion.

Preferably, the cross section of the convex part is circular arc.

Preferably, the cross section of the groove is circular arc.

Preferably, the protruding part and the corresponding side wall of the housing are of an integrally formed structure.

Preferably, the step part and the corresponding side wall of the housing are of an integrally formed structure.

Preferably, a top edge of the boss is flush with a step face of the stepped portion.

A battery comprises a battery core and the battery shell, wherein the battery core is placed in the battery shell.

The utility model has the advantages that:

the utility model provides a battery case to set up step portion and bellying respectively on the inside two pairs of relative casing lateral walls that set up of battery case. Therefore, in the process of sealing the battery case, the laser passing through the fit clearance between the battery case and the cover plate is blocked by the step part or the bulge part and is not directly emitted into the battery case. In addition, the arrangement step part can support the cover plate, and the cover plate is prevented from falling into the battery case from the open end in the assembling process due to deformation in the production process.

The utility model also provides a battery places electric core in the inside of above-mentioned battery case for carry out the closing cap in-process to the battery after electric core is placed, because the stopping of step portion or bellying, the laser can not pass battery case and apron fit clearance and then jet into the inside electric core of burning of battery case, has guaranteed the security in the battery production process.

Drawings

Fig. 1 is a schematic structural diagram of a battery case provided with an uninstalled cover plate according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a front view of an embodiment of the present invention;

FIG. 4 is a schematic view in the direction C-C of FIG. 3;

fig. 5 is a partially enlarged view at B in fig. 4.

In the figure:

1-a cover plate; 2-opening the mouth;

3-side wall of the shell; 301-a first housing side wall; 302-a second housing sidewall;

4-a boss; 5-a step portion; 6-groove; 7-battery case.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, 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. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a battery including a battery cell and a battery case, in which the battery cell is placed to protect the battery cell through the battery case. Wherein, the battery case includes apron 1 and battery case 7, and battery case 7's top sets up uncovered 2, and apron 1 can close to fix in uncovered 2 department.

In consideration of the problem that laser penetrates through a fit gap between the battery shell 7 and the cover plate 1 and is injected into the battery shell due to the clearance fit between the cover plate 1 and at least part of the shell side wall 3 in the covering process, and the battery core in the battery shell is directly burnt.

In order to solve the above technical problem, as shown in fig. 1 and fig. 2, the battery case 7 includes two pairs of case side walls 3 which are oppositely disposed, wherein one end of one pair of case side walls 3 close to the opening 2 is provided with a protruding portion 4, one end of the other pair of case side walls 3 close to the opening 2 is provided with a step portion 5, the bottom of the cover plate 1 can abut against the step surface of the step portion 5, and the protruding portion 4 and the step portion 5 are both located on the inner surface of the battery case 7.

It can be understood that, through set up step portion 5 and bellying 4 respectively on the casing lateral wall 3 of two pairs of relative settings in battery case 7 inside to in carrying out the closing cap in-process, the laser just can receive the blockking of step portion 5 or bellying 4 when passing the fit clearance between battery case 7 and apron 1, and can not directly penetrate into the inside of battery case and then burn the interior electric core of battery case, has guaranteed the security in the battery production process. In addition, set up step portion 5 and can also play the supporting role to apron 1, prevent that apron 1 from falling into the battery case inside and extrude the inside electric core of battery case from uncovered 2 in welding process.

Further, as shown in fig. 1, in the battery production process, the cover plate 1 is only in clearance fit with a part of the housing side walls 3, that is, the two pairs of housing side walls 3 are respectively a pair of first housing side walls 301 and a pair of second housing side walls 302, the first housing side walls 301 are in clearance fit with the cover plate 1, and the second housing side walls 302 are in interference fit with the cover plate 1. Wherein the boss 4 is provided on the first housing sidewall 301 and the step 5 is provided on the second housing sidewall 302. It can be understood that if step portion 5 sets up on first casing lateral wall 301 with 1 clearance fit of apron, then for sheltering from the fit clearance, step portion 5's thickness needs to be greater than the fit clearance to make step portion 5 inside the shared space of battery too much, have the risk of the inside electric core of extrusion battery. Therefore, the first housing sidewall 301 which is in clearance fit with the cap plate 1 is provided with the protruding portion 4 for blocking the fit clearance, and the second housing sidewall 302 which is in interference fit with the cap plate 1 is provided with the stepped portion 5 for supporting the cap plate 1.

As shown in fig. 1 in conjunction with fig. 3, at least one of the case side walls 3 is further provided with a groove 6, and the groove 6 is located on the outer surface of the battery case 7, in order to facilitate handling of the battery during the battery production process. Therefore, in the automatic production process of the battery, the machine or the staff for carrying the battery can carry the battery to the corresponding position by taking the groove 6 as a handle to carry out various machining procedures on the battery, and the production efficiency of the battery is improved to a certain extent.

As shown in fig. 1, 3 and 5, in order to simplify the processing steps of the groove 6 and the boss 4, the groove 6 and the boss 4 are disposed on the same housing sidewall 3, and the position of the groove 6 corresponds to that of the boss 4. It can be understood that the raised portion 4 of the side wall 3 of the case is thicker than the other positions of the side wall 3 of the case, so that by arranging the raised portion 4 on the inner surface of the battery case 7 and arranging the groove 6 at the corresponding position on the outer surface of the battery case 7, the problem that the groove 6 is arranged at other positions of the side wall 3 of the case, the structure at the groove 6 of the side wall 3 of the case is weak, and the strength of the whole battery case is reduced is avoided.

In order to ensure the strength of the joint of the protruding part 4 and the shell side wall 3 and prevent the protruding part 4 from being separated from the corresponding shell side wall 3 in the welding process, the protruding part 4 and the corresponding shell side wall 3 are of an integrally formed structure.

Further, as shown in fig. 2 and 5, the boss 4 has an arc-shaped cross section for facilitating the processing of the boss 4. It is conceivable that, if the protruding portion 4 has an edge, when the first case side wall 301 is processed by a process such as press molding, stress is concentrated at the edge due to the edge of the protruding portion 4, and the first case side wall 301 is easily broken. By providing the boss 4 in the arc shape, the first case side wall 301 can be prevented from being broken due to stress concentration, and the processing efficiency of the boss 4 can be improved.

Specifically, the length of the protruding portion 4 is equal to the fitting length between the first casing side wall 301 and the cover plate 1, and the protruding height of the protruding portion 4 is not less than the fitting gap between the first casing side wall 301 and the cover plate 1, so as to ensure that the protruding portion 4 can block the fitting gap.

Optionally, the top edge of the protruding part 4 is flush with the step surface of the step part 5, thereby saving the battery space and controlling the overall volume of the battery.

Preferably, the cross-section of the groove 6 is circular arc-shaped, as shown in fig. 1 in combination with fig. 5. By adapting the shape of the groove 6 to the shape of the projection 4, the groove 6 can be formed at a position corresponding to the outer surface of the battery case 7 while the projection 4 is processed when the case side wall 3 is processed by using a processing technique, that is, the projection 4 and the groove 6 can be formed at the same time by only one processing, and the processing time is saved while the whole processing procedure is made simpler. In this embodiment, the protrusion 4 and the groove 6 are formed by press forming, but in other embodiments, other processes may be used as long as the protrusion 4 and the groove 6 can be formed at the same time, and the process is not limited herein.

Considering that the bottom of the cover plate 1 abuts against the step surface of the step part 5, that is, the step part 5 needs to bear the weight of the cover plate 1, the step part 5 and the corresponding housing side wall 3 are of an integrally molded structure, so as to ensure the strength of the connection between the step part 5 and the housing side wall 3.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A battery case, comprising:

a cover plate (1);

battery case (7), the top of battery case (7) sets up uncovered (2), apron (1) can be covered and close to be fixed uncovered (2) department, battery case (7) include two pairs of relative casing lateral wall (3) that set up, and one of them is a pair of casing lateral wall (3) are close to all be provided with bellying (4), another is right on one end of uncovered (2) casing lateral wall (3) are close to one of uncovered (2) is served and all is provided with step portion (5), just the bottom of apron (1) can with the step face butt of step portion (5), bellying (4) with step portion (5) all are located the internal surface of battery case (7).

2. The battery case according to claim 1, wherein the two pairs of case side walls (3) are a pair of first case side walls (301) and a pair of second case side walls (302), respectively, the first case side walls (301) are in a clearance fit with the cap plate (1), the second case side walls (302) are in an interference fit with the cap plate (1), the protrusions (4) are provided on the first case side walls (301), and the steps (5) are provided on the second case side walls (302).

3. The battery case according to claim 1, wherein at least one of said case side walls (3) is further provided with a groove (6), and said groove (6) is located on the outer surface of said battery case (7).

4. The battery casing according to claim 3, wherein the groove (6) and the protrusion (4) are provided on the same casing side wall (3), and the groove (6) corresponds to the position of the protrusion (4).

5. The battery can according to claim 4, wherein the cross-section of the boss (4) is circular arc-shaped.

6. The battery can according to claim 4, wherein the cross-section of the groove (6) is circular-arc shaped.

7. The battery can according to any one of claims 1 to 6, wherein the protrusions (4) and the corresponding side walls (3) of the can are of an integrally formed structure.

8. The battery case according to any one of claims 1 to 6, wherein the stepped portion (5) and the corresponding case side wall (3) are of an integrally molded structure.

9. The battery case according to any one of claims 1 to 6, wherein the top edge of the protrusion (4) is flush with the step face of the step part (5).

10. A battery comprising a cell, wherein the battery further comprises a battery case according to any one of claims 1-9, wherein the cell is disposed within the battery case.