CN113097615B

CN113097615B - Shell structure and power battery

Info

Publication number: CN113097615B
Application number: CN202110487784.5A
Authority: CN
Inventors: 励建炬; 范洪斌
Original assignee: Shenzhen Kedali Industry Co ltd
Current assignee: Jiangmen Kedali Precision Industry Co.,Ltd.
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2025-04-15
Anticipated expiration: 2041-04-30
Also published as: CN113097615A

Abstract

The invention discloses a shell structure and a power battery, and relates to the technical field of power batteries. The housing structure includes a shell, a seal, and a post. The shell defines a containing cavity, and a mounting hole is formed in the shell. The sealing element is matched in the mounting hole, one end of the sealing element stretches into the accommodating cavity, and the sealing element is bent and abutted against the shell along the radial outer side of the mounting hole. The pole is worn to establish in the sealing member, and the one end of pole stretches into the chamber of holding, and buckles along the radial outside of mounting hole and lean on the sealing member. The shell structure realizes the installation in the shell only through the pole and the sealing piece, can obviously reduce the types and the quantity of parts on the premise of not influencing the performance of the shell structure, reduces the production cost of products, does not need to adopt welding processing, can improve the reliability of the pole when fixed on the shell, and further improves the performance of the shell structure. In addition, since there is no metal slag generated by the welding process, the use safety of the case structure can be ensured.

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 prior battery often needs to be provided with a plurality of sealing structures when the pole is installed, so that the sealing installation of the pole on the shell or the end cover of the battery is better ensured, but the plurality of sealing structures easily lengthen the assembly procedure 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 in the battery in the welding process, so that the battery is not easy to clean and is more easy to damage the safety of the battery.

Therefore, there is a need for a housing structure and a power battery, which can reduce the production cost of the housing and improve the use safety of the housing structure.

Disclosure of Invention

An object of the present invention is to provide a housing structure, which can reduce the production cost of the housing and improve the use safety 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:

The shell structure comprises a shell, a sealing piece and a pole post, wherein the shell is used for defining a containing cavity, a mounting hole is formed in the shell, the sealing piece is matched in the mounting hole, one end of the sealing piece stretches into the containing cavity and is bent and abutted to the shell along the radial outer side of the mounting hole, the pole post is arranged in the sealing piece in a penetrating mode, and one end of the pole post stretches into the containing cavity and is bent and abutted to the sealing piece along the radial outer side of the mounting hole.

Further, the pole comprises a body penetrating through the sealing piece and a bending part, wherein the bending part is arranged at one end of the body and is positioned in the accommodating cavity, and the bending part is abutted against the sealing piece along the radial outer side of the mounting hole.

Further, the bending part and the sealing piece are riveted on the shell.

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

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

Further, the end face of the body is provided with a power connection surface, and an annular groove is formed between the bending part and the power connection surface before the pole is riveted.

Further, a distance between the top wall of the bending portion and the housing is smaller than a distance between the end of the body and the housing.

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

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

A power cell comprising the housing structure described above.

The invention has the beneficial effects that the sealing element is abutted against the shell, so that the sealing element and the shell can be firmly connected, and the pole post is abutted against the sealing element, so that the pole post and the sealing element can be firmly and reliably fixed on the shell, and the pole post is firmly and reliably mounted on the shell. The shell structure of this embodiment has realized the installation in the casing through utmost point post and sealing member only, can be under the prerequisite that does not influence shell structure's performance, has shown the type and the quantity of having reduced the part, both reduced the consumable cost of product, also reduced the assembly process of product to further reduce the manufacturing cost of product. Simultaneously, sealing member and utmost point post all can be fixed on the casing through fastening technology such as riveting to need not to adopt welding process, can improve the reliability when the utmost point post is fixed on the casing, and then improve shell structure's performance. In addition, because no metal welding slag is generated in the welding process, the cleaning procedure of the shell structure can be avoided, the metal welding slag can be prevented from damaging the telecom electrode group in the accommodating cavity, and the use safety of the shell structure is ensured.

The power battery has the advantages that the production cost of the power battery can be reduced and the safety of the power battery can be improved due to the shell structure.

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 a schematic view of the internal structure of a housing structure according to an embodiment of the present invention;

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

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

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

Reference numerals

1. A housing; 11, a containing cavity 12, a second sealing bulge;

2. A second sealing flange;

3. the electrode comprises a pole column, 31, a body, 32, a bending part, 33, a bending crack, 34, an annular groove, 35, a first sealing flange and 36, a first sealing protrusion.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The specific structure of the case 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 seal 2 and a pole 3. The housing 1 defines a receiving chamber 11, and the housing 1 is provided with mounting holes. The sealing member 2 is fitted in the mounting hole, and one end of the sealing member 2 extends into the accommodating chamber 11 and is bent radially outward of the mounting hole to abut against the housing 1. The pole 3 is arranged in the sealing element 2 in a penetrating way, one end of the pole 3 extends into the accommodating cavity 11 and is bent and abutted on the sealing element 2 along the radial outer side of the mounting hole.

It will be appreciated that by abutting the seal 2 against the housing 1, a secure connection of the seal 2 with the housing 1 can be achieved, and by abutting the pole 3 against the seal 2, a secure connection of the pole 3 and the seal 2 can be achieved, whereby the pole 3 and the seal 2 can be secured firmly and reliably to the housing 1, thereby achieving a secure and reliable mounting of the pole 3 on the housing 1. The shell structure of this embodiment has realized the installation in casing 1 through utmost point post 3 and sealing member 2 only, can be under the prerequisite that does not influence shell structure's performance, has shown type and the quantity of having 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. Simultaneously, sealing member 2 and utmost point post 3 can all be fixed on casing 1 through fastening technology such as riveting to need not to adopt welding process, can improve the reliability when utmost point post 3 is fixed on casing 1, and then improve the performance of shell structure. In addition, because no metal welding slag is generated in the welding process, the cleaning procedure of the shell structure can be avoided, the damage of the metal welding slag to the telecom electrode group in the accommodating cavity 11 can be prevented, and the use safety of the shell structure is ensured.

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

It can be appreciated that after the pole 3 is divided into the body 31 and the bending portion 32, an operator can bend the bending portion 32 against the sealing member 2, 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 appreciated that, because the bending part 32 and the end part of the sealing element 2 are both located in the accommodating cavity 11, an operator can rivet the sealing element 2 and the bending part 32 on the body 31 at the same time in the accommodating cavity 11, so that the connection stability of the bending part 32 and the shell 1 is ensured, and the better sealing performance between the bending part 32 and the shell 1 is ensured through the extruded sealing element 2. In addition, because from holding the interior riveting of chamber 11 for the diapire horizontal setting of casing 1 can be kept in the riveting process, thereby avoided casing 1 crooked in the riveting process, ensured the processingquality of shell structure. 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 which have good riveting effects, and the structure after the riveting may be determined according to the actual requirement without specific limitation.

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

It can be appreciated that the bending crack 33 can facilitate the operator to rivet the bending part 32 through the riveting tool, and at the same time, the bending part 32 can be ensured not to 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 the bending slit 33 gradually decreases in a direction toward the other end of the body 31.

It can be appreciated that through the above-mentioned structural arrangement, the bending portion 32 can be firmly connected with the housing 1 while still maintaining a stable connection relationship with the body 31, thereby preventing the bending portion 32 from being disconnected with the body 31 during the riveting process, and ensuring the connection quality of the pole 3 on the housing 1.

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

It can be understood that in this embodiment, the power receiving surface is the top surface of the body 31, and the annular groove 34 is disposed between the bending portion 32 and the power receiving surface, so that the riveting tool can be further ensured not to damage the power receiving surface of the body 31, and normal and reliable use of the pole 3 is further ensured.

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

It can be appreciated that through the above-mentioned structure setting, can prevent to be used for the spacing problem of kink 32 when body 31 and electric core electrode group are joined in marriage after the riveting is accomplished to can guarantee the normal application of utmost point post 3 betterly, improve the assembly yields of shell structure, reduce its overall manufacturing cost.

In some embodiments, as shown in fig. 2 and 4, the pole 3 further comprises a first sealing flange 35 abutting the outside 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 bending portion 32 is disposed around the body 31. It is understood that the bending portion 32 disposed around the body 31 can further improve the connection stability and the tightness when the bending portion 32 is riveted with the housing 1.

In some embodiments, as shown in fig. 2-4, 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 appreciated that, owing to be equipped with first seal protrusion 36 on the utmost point post 3, when the diapire of utmost point post 3 butt seal 2, first seal protrusion 36 will extrude seal 2, both can effectively compress tightly seal 2 on the installed part through extrusion seal 2, with the leakproofness between seal 2 and the installed part, can also improve the sealed effect between utmost point post 3 and the seal 2 through the extrusion effect between first seal protrusion 36 and the seal 2, thereby can guarantee the sealing performance of utmost point post 3 on the installed part betterly, 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, since the first sealing protrusion 36 is additionally provided, it is unnecessary to provide other welding structures, the number of parts can be reduced and the assembly efficiency of the power battery can be improved, thereby reducing the production cost of the power battery. In addition, because the power battery of this embodiment need not to adopt the welding to realize sealedly for can not adhere to there is the metal welding slag on the installed part, both avoided 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.

Examples:

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

The housing structure of the present embodiment includes a case 1, a seal member 2, and a pole 3. The housing 1 defines a receiving chamber 11, and the housing 1 is provided with mounting holes. The sealing member 2 is fitted in the mounting hole, and one end of the sealing member 2 extends into the accommodating chamber 11 and is bent radially outward of the mounting hole to abut against the housing 1. The pole 3 is arranged in the sealing element 2 in a penetrating way, one end of the pole 3 extends into the accommodating cavity 11 and is bent and abutted on the sealing element 2 along the radial outer side of the mounting hole.

The pole 3 includes a body 31 and a bent portion 32. The body 31 is provided in the seal 2. The bending portion 32 is provided at one end of the body 31 and is located in the accommodation chamber 11, and the bending portion 32 abuts on 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 gradually decreases in a direction toward the other end of the body 31. The end face of the body 31 is provided with a power connection surface, and an annular groove 34 is arranged between the bending part 32 and the power connection surface before the pole 3 is riveted. 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 outside 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 protrusion 36, and the housing 1 is provided with a second sealing protrusion 12.

In the description of the present specification, reference to the term "some embodiments," "other embodiments," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims

1. A housing structure, comprising:

The shell (1), the shell (1) limits and holds the cavity (11), offer the mounting hole on the said shell (1);

The sealing piece (2) is matched in the mounting hole, one end of the sealing piece (2) stretches into the accommodating cavity (11) and is bent and abutted against the shell (1) along the radial outer side of the mounting hole;

The pole column (3) is penetrated in the sealing piece (2), one end of the pole column (3) stretches into the accommodating cavity (11) and is bent and abutted against the sealing piece (2) along the radial outer side of the mounting hole;

the pole (3) comprises:

A body (31), the body (31) penetrating in the seal (2);

A bending part (32), wherein the bending part (32) is arranged at one end of the body (31) and is positioned in the accommodating cavity (11), and the bending part (32) is abutted against the sealing piece (2) along the radial outer side of the mounting hole;

a bending crack (33) is arranged between the bending part (32) and the body (31);

The distance between the top wall of the bending part (32) and the shell (1) is smaller than the distance between the end of the body (31) and the shell (1).

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

3. The housing structure according to claim 1, characterized in that the width of the bending slit (33) gradually decreases in a direction toward the other end of the body (31).

4. The housing structure according to claim 2, characterized in that the end face of the body (31) is provided with a current-receiving surface, and an annular groove (34) is provided between the bending portion (32) and the current-receiving surface before the pole (3) is riveted.

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

6. The 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).

7. A power cell comprising the housing structure of any one of claims 1-6.