CN218274859U

CN218274859U - Shell structure and lithium battery

Info

Publication number: CN218274859U
Application number: CN202221208881.2U
Authority: CN
Inventors: 李兴艳; 李丽; 宋雪庆; 张保元
Original assignee: Hebei Tianqi Tongyu Aviation Equipment Technology Development Co ltd
Current assignee: Hebei Tianqi Tongyu Aviation Equipment Technology Development Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2023-01-10
Anticipated expiration: 2032-05-18

Abstract

The utility model provides a shell structure and lithium cell, shell structure include casing and end cover. The shell is provided with an accommodating cavity for placing the lithium battery monomer; the shell is also provided with an opening communicated with the accommodating cavity; the inner side wall surrounding the accommodating cavity is provided with a female inserting part, and the female inserting end is positioned at the opening. The end cover is buckled at the opening, and is provided with a male plugging portion matched with the female plugging portion, and the male plugging portion is matched and plugged with the female plugging portion. The utility model provides a shell structure can effectually compensate the throat, and then guarantees the sealed effect after casing and end cover butt joint, and the practicality is strong.

Description

Shell structure and lithium battery

Technical Field

The utility model belongs to the technical field of the airborne vehicle, concretely relates to shell structure and lithium cell.

Background

A lithium battery is a type of battery using a nonaqueous electrolyte solution, using lithium metal or a lithium alloy as a positive/negative electrode material. The lithium battery is widely applied to energy storage power systems such as hydraulic power stations, firepower stations, wind power stations and solar power stations, and a plurality of fields such as automobiles, military equipment and aerospace. The lithium battery has the characteristics of high energy ratio, light weight, long service life and strong adaptability to high and low temperatures, so that the lithium battery is not selected for aircraft, taking a rotorcraft as an example, and can ensure the starting of an engine and the operation of an avionic system. Due to the particularity of the aircraft, the lithium battery adopted by the aircraft is high in requirement, the requirement for the shell corresponding to the lithium battery is high, and waterproof, fireproof, air pressure change adaption and the like need to be guaranteed so as to guarantee effective protection of the lithium battery inside.

In the prior art, a lithium battery case adopted by an aircraft generally includes a casing and a cover plate made of polyvinyl chloride, and the casing and the cover plate enclose a cavity for placing a lithium battery cell. In order to ensure the sealing performance, the cover plate and the shell are usually sleeved, that is, the inner side wall of the cover plate is in contact with the outer side wall of the shell, and a sealing adhesive is applied to the contact surface. However, since the housing and the cover plate are both injection-molded structures, a groove (a position of a side wall surface of the housing or the cover plate close to the butt joint is recessed inward) usually occurs at the groove position, and after the groove is butted at this time, the male end and the female end of the groove cannot be fitted, so that a gap occurs at the groove, and further, sealing failure is caused, the sealing effect is deteriorated, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a shell structure and lithium cell aims at solving the poor problem of practicality that current lithium battery case structure leads to because of the leakproofness is poor.

In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a housing structure comprising:

the shell is provided with an accommodating cavity for accommodating the lithium battery monomer; the shell is also provided with an opening communicated with the accommodating cavity; an inserting female part is arranged around the inner side wall of the accommodating cavity, and the inserting female end is positioned at the opening; and

the end cover is buckled at the opening, and is provided with a male inserting part matched with the female inserting end, and the male inserting part is used for being inserted into the female inserting part to seal the accommodating cavity.

In one possible implementation, the housing has a rectangular parallelepiped shape; the end cover is of a cuboid appearance structure matched with the shell.

In some embodiments/exemplarily/examples, the female plug-in part is a plug-in slot; the male part of the plug is a plug strip matched with the plug groove.

In a possible implementation manner, the male plugging part and the female plugging part are in a tongue-and-groove butt joint structure; setting the depth direction of the accommodating cavity as a first direction; a plurality of first limiting ribs are arranged at intervals around the inner side wall of the accommodating cavity; the end cover is provided with a plurality of second limiting ribs which are in one-to-one correspondence with the first limiting ribs and are used for being clamped with the second limiting ribs in a matched limiting manner after the end cover is buckled on the shell, so that the female part of the plug-in connection is attached to the male part of the plug-in connection.

In some embodiments/examples/illustrations, the first retention bead is of unitary construction with the housing.

In some embodiments/examples/illustrations, the second retention bead is a unitary structure with the end cap.

The utility model also provides a lithium cell, including foretell shell structure.

In this implementation mode/application embodiment, set up grafting female portion in the uncovered department of casing, set up the public portion of grafting on the end cover, through the grafting cooperation of grafting female portion and the public portion of grafting, guarantee the inseparable laminating of grafting female portion and the public portion of grafting, prevent that casing and end cover butt joint department from appearing the space, can effectually compensate the throat, and then guarantee the sealed effect after casing and the end cover dock, the practicality is strong.

Drawings

Fig. 1 is an exploded schematic view of a housing structure according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural diagram (insertion groove connection structure) of a joint of a tongue-and-groove and an end cover of a housing structure according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structural view (tongue-and-groove butt joint structure) of a first limiting rib and a second limiting rib of a housing structure according to an embodiment of the present invention;

description of reference numerals:

10. a housing; 11. a female part is inserted; 111. a first abutting surface; 112. a second abutting surface; 12. a first limiting rib; 121. a first bevel structure; 13. an accommodating cavity; 20. an end cap; 21. a male part is inserted; 211. a third abutting surface; 212. a fourth abutting surface; 22. a second limiting rib; 221. a second bevel structure.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 2, the structure of the housing according to the present invention will be described. The housing structure includes a housing 10 and an end cap 20. The shell 10 is provided with an accommodating cavity 13 for placing the lithium battery unit; the housing 10 further has an opening communicating with the accommodation chamber 13; an inserting female part 11 is arranged around the inner side wall of the accommodating cavity 13, and the inserting female end is positioned at the opening; the end cover 20 is buckled at the opening, and the end cover 20 is provided with an inserting male part 21 matched with the inserting female end.

The shell structure that this embodiment provided, compare with prior art, set up female portion 11 of pegging graft in the uncovered department of casing 10, set up public portion 21 of pegging graft on end cover 20, through the grafting cooperation of female portion 11 of pegging graft and public portion 21 of pegging graft, guarantee the inseparable laminating of female portion 11 of pegging graft and public portion 21 of pegging graft, prevent that casing 10 and end cover 20 butt joint from appearing the space, can effectually compensate the throat, and then guarantee the sealed effect after casing 10 docks with end cover 20, the practicality is strong.

In some embodiments, the housing 10 and the end cap 20 may be configured as shown in fig. 1. Referring to fig. 1, a housing 10 has a rectangular parallelepiped shape; the end cap 20 has a rectangular parallelepiped shape adapted to the housing 10. This kind of structure can guarantee to be convenient for make, also can guarantee the assembly of use simultaneously.

In some embodiments, the female plug part 11 and the male plug part 21 may be configured as shown in fig. 2. Referring to fig. 2, the female portion 11 of the plug-in connection is a plug-in groove, the male portion 21 of the plug-in connection is a plug-in strip matched with the plug-in groove, the structure can be manufactured conveniently, meanwhile, the structure can achieve limiting butt connection, tightness of butt connection faces is guaranteed, sealing effects are guaranteed, and in addition, the structure is convenient for injection molding.

In some embodiments, the housing 10 and the end cap 20 may be configured as shown in fig. 3. Referring to fig. 3, the depth direction of the accommodating cavity 13 is set to be a first direction; the male plug-in part 21 and the female plug-in part 11 are in a tongue-and-groove butt joint structure. A plurality of first limiting ribs 12 are arranged around the inner side wall of the accommodating cavity 13 at intervals. The end cover 20 is provided with a plurality of second limiting ribs 22 which are arranged in one-to-one correspondence with the first limiting ribs 12 and are used for being in adaptive limiting clamping connection with the second limiting ribs 22 after the end cover 20 is buckled on the shell 10, so that the inserting female part 11 is attached to the inserting male part 21.

The housing 10 and the end cover 20 form a tongue-and-groove structure through the female insertion part 11 and the male insertion part 21, so that the coverage area of the adhesive can be ensured, and the sealing effect can be further ensured. Through the spacing rib 22 of first spacing rib 12 and second that sets up, can be in the back of end cover 20 lock on casing 10, spacing joint to guarantee the inseparable laminating of female portion 11 and the public portion 21 of pegging graft, can effectually compensate the throat, and then guarantee the sealed effect after casing 10 docks with end cover 20, the practicality is strong.

The female plug portion 11 has a first contact surface 111 and a second contact surface 112, the first contact surface 111 being provided perpendicular to the first direction, and the second contact surface 112 being provided parallel to the first direction. Each first limiting rib 12 is arranged along the first direction, one end of each first limiting rib 12 is connected with the bottom surface of the accommodating cavity 13, and the other end of each first limiting rib 12 extends out of the first abutting surface 111. The extending end of the first limiting rib 12 extends out of the first abutting surface 111, so that the male plug part 21 can be clamped by the second abutting surface 112, the male plug part 21 can be tightly attached to the second abutting surface, and the sealing effect can be guaranteed.

The end of the first limiting rib 12 extending out of the first abutting surface 111 is provided with a first inclined surface structure 121, the first inclined surface structure 121 is arranged towards the first abutting surface 111, the inclined surface structure can ensure the sliding-in of the second limiting rib 22, the interference with the second limiting rib 22 is prevented, and the structure is simple and convenient to manufacture.

In some embodiments, the first retaining rib 12 may be configured as shown in fig. 3. Referring to fig. 3, the first limiting rib 12 and the housing 10 are integrally formed, and the structure can ensure integral injection molding, and is simple in structure and high in practicability.

The male plug portion 21 has a third abutment surface 211 for fitting abutment with the first abutment surface 111 and a fourth abutment surface 212 for fitting abutment with the second abutment surface 112. One end of each second limiting rib 22 is provided with a second inclined surface structure 221 adapted to the first inclined surface structure 121, so that the second abutting surface 112 is attached to the fourth abutting surface 212 after the second limiting rib is in limiting clamping connection with the first inclined surface structure 121. One end of the second limiting rib 22 is flush with the third abutting surface 211, so that after the second limiting rib is abutted with the first limiting rib 12, the male inserting portion 21 is extruded along the normal direction of the second abutting surface 112, the second abutting surface 112 is tightly attached to the fourth abutting surface 212, and the sealing effect is ensured.

Preferably, the first inclined plane structure 121 and the second inclined plane structure 221 are both at an angle of 45 degrees.

In some embodiments, the second position-limiting ribs 22 may be configured as shown in fig. 3. Referring to fig. 3, the second limiting rib 22 and the end cover 20 are of an integrally formed structure, and the structure can ensure integral injection molding, and is simple in structure and high in practicability.

The embodiment of the application also provides a lithium battery which comprises the shell structure.

Compared with the prior art, the lithium battery provided by the embodiment of the application can compensate the necking effectively through the shell 10 and the end cover 20 which are arranged, so that the sealing effect of the shell 10 and the end cover 20 after butt joint is ensured, and the practicability is high.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A housing structure, comprising:

2. The housing structure of claim 1, wherein said shell is a rectangular parallelepiped configuration; the end cover is of a cuboid appearance structure matched with the shell.

3. The housing structure of claim 2, wherein the female plug-in portion is a plug-in slot; the male part of the plug is a plug strip matched with the plug groove.

4. The housing structure of claim 2, wherein the male plug-in portion and the female plug-in portion are tongue-and-groove butt structures; setting the depth direction of the accommodating cavity as a first direction; a plurality of first limiting ribs are arranged at intervals around the inner side wall of the accommodating cavity; the end cover is provided with a plurality of second limiting ribs which are in one-to-one correspondence with the first limiting ribs and are used for being clamped with the second limiting ribs in a matched limiting manner after the end cover is buckled on the shell, so that the female part of the plug-in connection is attached to the male part of the plug-in connection.

5. The housing structure of claim 4, wherein said first retention bead is of unitary construction with said shell.

6. The housing structure of claim 4, wherein said second retention bead is of unitary construction with said end cap.

7. Lithium battery, characterized in that it has a housing structure according to any one of claims 1-6.