CN113097615A

CN113097615A - Shell structure and power battery

Info

Publication number: CN113097615A
Application number: CN202110487784.5A
Authority: CN
Inventors: 励建炬; 范洪斌
Original assignee: Shenzhen Kedali Industry Co ltd
Current assignee: Shenzhen Kedali Industry Co ltd; Shenzhen Kedali Ind Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-09

Abstract

The invention discloses a shell structure and a power battery, and relates to the technical field of power batteries. The shell structure comprises a shell, a sealing element and a pole. The housing is limited to contain the chamber, has seted up the mounting hole on the housing. The sealing member is matched in the mounting hole, one end of the sealing member extends into the accommodating cavity, and the sealing member is bent along the radial outer side of the mounting hole and is abutted against the shell. Utmost point post is worn to establish in the sealing member, and the one end of utmost point post stretches into and holds the chamber, and buckles along the radial outside of mounting hole and lean on the sealing member. This shell structure has only realized the installation in the casing through utmost point post and sealing member, can show under the prerequisite that does not influence shell structure's performance, has reduced the type and the quantity of part, reduces the manufacturing cost of product, and need not to adopt welding process, can improve the reliability of utmost point post when fixed on the casing, and then improves shell structure's performance. In addition, the use safety of the shell structure can be ensured because no metal welding slag is generated by welding processing.

Description

Shell structure and power battery

Technical Field

The invention relates to the technical field of power batteries, in particular to a shell structure and a power battery.

Background

The existing battery is often required to be provided with a plurality of sealing structures when the pole is installed so as to better ensure the sealing installation of the pole on a shell or an end cover of the battery, but the plurality of sealing structures are easy to lengthen the assembly process and the number of parts of the battery, and the production cost of the battery is improved. Meanwhile, in order to ensure the sealing effect, welding is often adopted in the prior art, but metal welding slag is inevitably reserved inside the battery in the welding process, so that the battery is not easy to clean and is more prone to causing damage to the safety of the battery.

Therefore, a housing structure and a power battery are needed to reduce the production cost of the housing and improve the safety of the housing structure.

Disclosure of Invention

One object of the present invention is to provide a housing structure that can reduce the production cost of the housing and improve the safety of use of the housing structure.

Another object of the present invention is to provide a power battery, which can reduce the production cost of the power battery and improve the safety of the power battery.

In order to achieve the technical effects, the technical scheme of the invention is as follows:

a housing structure comprising: the shell defines an accommodating cavity, and is provided with a mounting hole; the sealing element is matched in the mounting hole, one end of the sealing element extends into the accommodating cavity and is bent along the radial outer side of the mounting hole to abut against the shell; the utmost point post, utmost point post wears to establish in the sealing member, the one end of utmost point post stretches into hold the chamber, and follow the radial outside buckling of mounting hole supports and leans on the sealing member.

Further, the pole includes: a body disposed through the seal; the bending part is arranged at one end of the body and is positioned in the accommodating cavity, and the bending part abuts against the sealing element along the radial outer side of the mounting hole.

Further, the bending part and the sealing member are riveted on the housing.

Furthermore, a bending crack is arranged between the bending part and the body.

Further, the width of the bending crack is gradually reduced in a direction toward the other end of the body.

Further, the terminal surface of body is equipped with connects the electric face before utmost point post riveting, the kink with connect and be equipped with annular groove between the electric face.

Further, the distance between the top wall of the bending part and the shell is smaller than the distance between the end of the body and the shell.

Further, the pole further comprises a first sealing flange abutting the outer side of the seal and/or the housing.

Further, the seal includes a second sealing flange abutting an outer side of the housing.

A power cell comprising the housing structure described above.

The invention has the following beneficial effects: through leaning on the sealing member on the casing, can realize the firm connection of sealing member and casing, through leaning on utmost point post on the sealing member, can realize the firm connection of utmost point post and sealing member, from this for utmost point post and sealing member can fix on the casing firmly reliably, thereby has realized the firm reliable installation of utmost point post on the casing. The shell structure of this embodiment has only realized the installation in the casing through utmost point post and sealing member, can show under the prerequisite that does not influence shell structure's performance, has reduced the type and the quantity of part, has both reduced the consumptive material cost of product, has also reduced the assembly process of product to further reduce the manufacturing cost of product. Meanwhile, the sealing element and the pole can be fixed on the shell through fastening processes such as riveting and the like, so that welding processing is not needed, the reliability of the pole when the pole is fixed on the shell can be improved, and the performance of the shell structure is improved. In addition, because no metal welding slag generated by welding processing exists, the cleaning procedure of the shell structure can be avoided, the phenomenon that the metal welding slag damages a telecommunication electrode group in the containing cavity can be prevented, and the use safety of the shell structure is ensured.

The invention has the following beneficial effects: according to the power battery provided by the invention, due to the shell structure, the production cost of the power battery can be reduced, and the safety of the power battery is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is one of the schematic internal structural views of a housing structure provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the enlarged structure at A in FIG. 1;

fig. 3 is a schematic view of an internal structure of a pole before riveting according to an embodiment of the present invention;

fig. 4 is a second schematic diagram of the internal structure of the housing structure according to the embodiment of the present invention.

Reference numerals

1. A housing; 11. an accommodating chamber; 12. a second seal projection;

2. a seal member; 21. a second sealing flange;

3. a pole column; 31. a body; 32. a bending section; 33. bending the crack; 34. an annular groove; 35. a first sealing flange; 36. a first sealing protrusion.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via 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.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The specific structure of the housing structure of the embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1-4, fig. 1 discloses a housing structure comprising a housing 1, a sealing member 2 and a pole 3. The housing 1 defines an accommodating cavity 11, and the housing 1 is provided with a mounting hole. The sealing element 2 is fitted in the mounting hole, and one end of the sealing element 2 extends into the accommodating cavity 11 and is bent along the radial outer side of the mounting hole to abut against the shell 1. Utmost point post 3 wears to establish in sealing member 2, and the one end of utmost point post 3 stretches into and holds chamber 11, and buckles along the radial outside of mounting hole and lean on sealing member 2.

It can be understood that the sealing element 2 is abutted against the casing 1, so that the sealing element 2 can be stably connected with the casing 1, and the pole 3 is abutted against the sealing element 2, so that the pole 3 and the sealing element 2 can be stably and reliably fixed on the casing 1, and the pole 3 can be stably and reliably mounted on the casing 1. The shell structure of this embodiment has only realized the installation in casing 1 through utmost point post 3 and sealing member 2, can be under the prerequisite that does not influence shell structure's performance, is showing the type and the quantity that have reduced the part, has both reduced the consumptive material cost of product, has also reduced the assembly process of product to further reduce the manufacturing cost of product. Meanwhile, the sealing element 2 and the pole 3 can be fixed on the shell 1 through fastening processes such as riveting and the like, so that welding processing is not needed, the reliability of the pole 3 in the fixing process on the shell 1 can be improved, and the performance of a shell structure is improved. In addition, because no metal welding slag generated by welding processing exists, the cleaning process of the shell structure can be avoided, the metal welding slag can be prevented from damaging the telecommunication electrode group in the accommodating cavity 11, and the use safety of the shell structure is ensured.

In some embodiments, as shown in fig. 2 and 4, the pole 3 comprises a body 31 and a bent portion 32. The body 31 is pierced in the seal 2. The bent portion 32 is provided at one end of the body 31 in the accommodation chamber 11, and the bent portion 32 abuts against the seal member 2 along the radially outer side of the mounting hole.

It can be understood that, after the pole 3 is divided into the body 31 and the bent portion 32, the bent portion 32 can be bent and abutted against the sealing member 2 by an operator, so that the pole 3 and the housing 1 can be stably connected through the sealing member 2.

In some embodiments, as shown in fig. 2 and 4, the fold 32 and the seal 2 are riveted to the housing 1.

It can be understood that, because the end portions of the bending portion 32 and the sealing element 2 are both located in the accommodating cavity 11, an operator can rivet the sealing element 2 and the bending portion 32 on the body 31 simultaneously in the accommodating cavity 11, so that the connection stability of the bending portion 32 and the shell 1 is ensured, and the sealing performance between the bending portion 32 and the shell 1 through the squeezed sealing element 2 is also better ensured. In addition, owing to rivet from holding chamber 11 in for the diapire level setting that can keep casing 1 in the riveting process, thereby avoided casing 1 crooked in the riveting process, ensured shell structure's processingquality. It should be noted that, in the riveting process of the bending portion 32 and the sealing member 2, as shown in fig. 2, the riveting may be stopped when the sealing member 2 presses the housing 1 and the housing 1 is not deformed, or as shown in fig. 4, the riveting may be stopped after the sealing member 2 presses the housing 1 and the housing 1 is deformed, both of them can achieve a better riveting effect, and the specific riveted structure may be determined according to actual requirements without specific limitations.

In some embodiments, as shown in fig. 2 and 4, a bending slit 33 is provided between the bending portion 32 and the body 31.

It can be understood that the bending crack 33 can facilitate the operator to rivet the bending part 32 through the riveting tool, and meanwhile, the bending part 32 can not damage the body 31 in the riveting process, so that the normal function of the pole 3 is better ensured.

In some embodiments, as shown in fig. 2 and 4, the width of bending slits 33 gradually decreases in a direction toward the other end of body 31.

It can be understood that, with the above-mentioned structural arrangement, the bent portion 32 can be stably connected with the housing 1 while still maintaining a stable connection relationship with the body 31, so that the bent portion 32 is prevented from being disconnected from the body 31 during the riveting process, and the connection quality of the pole 3 on the housing 1 is ensured.

In some embodiments, as shown in fig. 3, the end face of the body 31 is provided with a power connection surface, and before the terminal 3 is riveted, an annular groove 34 is provided between the bending portion 32 and the power connection surface.

It can be understood that, in this embodiment, the power connection surface is the top surface of the body 31, and since the annular groove 34 is provided between the bending portion 32 and the power connection surface, it can be further ensured that the power connection surface of the body 31 is not damaged by the riveting tool, and the normal and reliable use of the terminal 3 is further ensured.

In some embodiments, as shown in fig. 2 and 4, the distance between the top wall of the bent portion 32 and the housing 1 is smaller than the distance between the end of the body 31 and the housing 1.

It can be understood that, through the above structure setting, can prevent to accomplish the back in the riveting, by the spacing problem of kink 32 when body 31 and electric core utmost point group cooperate to can guarantee the normal application of utmost point post 3 better, improve shell structure's assembly yields, reduce its overall production cost.

In some embodiments, as shown in fig. 2 and 4, the pole 3 further comprises a first sealing flange 35 abutting the outer side of the seal 2 and/or the housing 1. The seal 2 comprises a second sealing flange 21 abutting the outside of the housing 1.

It will be appreciated that the first and

second sealing flanges

35, 21 can facilitate a sealed connection between the pole 3, the seal 2 and the mounting member.

In some embodiments, the bent portion 32 is disposed around the body 31. It can be understood that the bent portion 32 annularly disposed on the body 31 can further improve the connection stability and sealing performance when the bent portion 32 is riveted with the housing 1.

In some embodiments, as shown in fig. 2 to 4, the pole 3 is further provided with a first sealing protrusion 36, and the housing 1 is provided with a second sealing protrusion 12. It can be understood that, because be equipped with first sealed protruding 36 on utmost point post 3, when the diapire of 3 butt sealing member 2 of utmost point post, first sealed protruding 36 will extrude sealing member 2, can enough compress tightly sealing member 2 on the installed part through extruding sealing member 2, with the leakproofness between improvement sealing member 2 and the installed part, can also improve the sealed effect between utmost point post 3 and the sealing member 2 through the squeezing action between first sealed protruding 36 and the sealing member 2, thereby can guarantee the sealing performance of utmost point post 3 on the installed part better, prevent that the battery electrolyte in the installed part from spilling over by the intercommunicating pore department, and then can ensure power battery's safety in utilization. In addition, because the first sealing bulge 36 is additionally arranged, other welding structures are not required to be arranged, the number of parts can be reduced, the assembly efficiency of the power battery is improved, and the production cost of the power battery is reduced. In addition, because the power battery of this embodiment need not to adopt the welding to realize sealed for can not adhere to on the installed part and have had both avoidd the slagging-off process, can also avoid the safety problem that the inside metal welding slag of power battery brought, and then improved power battery's security.

The invention also discloses a power battery and the shell structure.

According to the power battery provided by the embodiment of the invention, due to the shell structure, the production cost of the power battery can be reduced, and the use safety of the power battery is improved.

Example (b):

the housing structure of one embodiment of the present invention is described below with reference to fig. 1 to 4.

The housing structure of the present embodiment includes a housing 1, a seal member 2, and a pole 3. The housing 1 defines an accommodating cavity 11, and the housing 1 is provided with a mounting hole. The sealing element 2 is fitted in the mounting hole, and one end of the sealing element 2 extends into the accommodating cavity 11 and is bent along the radial outer side of the mounting hole to abut against the shell 1. Utmost point post 3 wears to establish in sealing member 2, and the one end of utmost point post 3 stretches into and holds chamber 11, and buckles along the radial outside of mounting hole and lean on sealing member 2.

The pole 3 includes a body 31 and a bent portion 32. The body 31 is pierced in the seal 2. The bent portion 32 is provided at one end of the body 31 in the accommodation chamber 11, and the bent portion 32 abuts against the seal member 2 along the radially outer side of the mounting hole. The bent portion 32 and the seal 2 are riveted to the housing 1. A bending slit 33 is provided between the bending portion 32 and the body 31. The width of the bending slit 33 is gradually reduced in a direction toward the other end of the body 31. The end face of the body 31 is provided with an electric connection surface, and before the pole 3 is riveted, an annular groove 34 is arranged between the bending part 32 and the electric connection surface. The distance between the top wall of the bent portion 32 and the housing 1 is smaller than the distance between the end of the body 31 and the housing 1. The pole 3 further comprises a first sealing flange 35 abutting the outer side of the seal 2 and/or the housing 1. The seal 2 comprises a second sealing flange 21 abutting the outside of the housing 1. The pole 3 is also provided with a first sealing bulge 36, and the shell 1 is provided with a second sealing bulge 12.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A housing structure, comprising:

the shell (1) is used for limiting an accommodating cavity (11), and a mounting hole is formed in the shell (1);

the sealing element (2) is matched in the mounting hole, one end of the sealing element (2) extends into the accommodating cavity (11) and is bent along the radial outer side of the mounting hole to abut against the shell (1);

utmost point post (3), utmost point post (3) are worn to establish in sealing member (2), the one end of utmost point post (3) stretches into hold chamber (11), and follow the radial outside buckling of mounting hole supports and leans on sealing member (2).

2. The housing structure according to claim 1, characterized in that the pole (3) comprises:

a body (31), said body (31) being pierced in said seal (2);

the bent part (32) is arranged at one end of the body (31) and is positioned in the accommodating cavity (11), and the bent part (32) abuts against the sealing element (2) along the radial outer side of the mounting hole.

3. The housing arrangement according to claim 2, characterized in that the fold (32) and the seal (2) are riveted to the housing (1).

4. The housing arrangement according to claim 3, characterized in that a bending slit (33) is provided between the bending portion (32) and the body (31).

5. The housing structure according to claim 4, characterized in that the width of the bending slit (33) is gradually reduced in a direction towards the other end of the body (31).

6. The housing structure according to claim 3, characterized in that the end face of the body (31) is provided with an electrical connection surface, and before the pole (3) is riveted, an annular groove (34) is provided between the bending part (32) and the electrical connection surface.

7. The shell structure according to claim 2, characterized in that a distance between a top wall of the bent portion (32) and the case (1) is smaller than a distance between an end of the body (31) and the case (1).

8. The housing structure according to claim 2, characterized in that the pole (3) further comprises a first sealing flange (35) abutting the outer side of the seal (2) and/or the housing (1).

9. A housing structure according to claim 1, characterized in that the seal (2) comprises a second sealing flange (21) abutting the outside of the shell (1).

10. A power cell comprising the housing structure of any one of claims 1-9.