CN220456614U - Shell structure and cylindrical battery - Google Patents
Shell structure and cylindrical battery Download PDFInfo
- Publication number
- CN220456614U CN220456614U CN202321039295.4U CN202321039295U CN220456614U CN 220456614 U CN220456614 U CN 220456614U CN 202321039295 U CN202321039295 U CN 202321039295U CN 220456614 U CN220456614 U CN 220456614U
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- China
- Prior art keywords
- liquid injection
- end part
- injection hole
- groove
- hole
- Prior art date
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- 238000002347 injection Methods 0.000 claims abstract description 64
- 239000007924 injection Substances 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000000565 sealant Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 description 24
- 230000008595 infiltration Effects 0.000 description 8
- 238000001764 infiltration Methods 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Filling, Topping-Up Batteries (AREA)
Abstract
The application provides a shell structure and a cylindrical battery. The shell structure comprises a first end part, a second end part and a middle shell, wherein the middle shell is respectively connected with the first end part and the second end part, the first end part is used for being connected with the current collecting disc, the second end part is used for being connected with the top cover structure, a containing cavity is formed in the shell structure, and the containing cavity is used for containing the battery cell; the first end part is provided with a containing groove, the groove wall of the containing groove is provided with a liquid injection hole, the liquid injection hole is arranged in the middle of the first end part, and the liquid injection hole and the containing groove are communicated with the containing cavity; the shell structure also comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged in the liquid injection hole in a penetrating way, the first sealing piece is sleeved on the groove wall of the accommodating groove; the second sealing element is positioned in the accommodating groove, the second seal is coupled to the housing.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a shell structure and a cylindrical battery.
Background
In the production process of the cylindrical battery, the battery core and the current collecting disc are welded and then are arranged in the shell, the battery cap is connected with the shell in a riveting or welding mode to complete the structural assembly of the whole cylindrical battery, and finally, electrolyte is injected through the electrolyte injection hole of the battery shell to conduct the cylindrical battery.
In the prior art, the liquid filling port is generally arranged at the edge of the cover plate of the shell. For example, chinese patent application No. CN202210473645.1 discloses a lithium battery case convenient for liquid injection, which comprises a cylindrical tube, a positive electrode cover plate and a negative electrode cover plate, wherein the positive electrode cover plate and the negative electrode cover plate are used for sealing openings at two ends of the cylindrical tube, the positive electrode cover plate and the negative electrode cover plate are sealed to form a containing cavity, and the containing cavity is used for containing a lithium battery cell; the cylindrical tube comprises a diversion channel; the positive electrode cover plate comprises a liquid injection hole, an assembly through hole A is arranged in the center of the positive electrode cover plate, and the liquid injection hole is arranged at the edge of the positive electrode cover plate; the negative electrode cover plate comprises a current collecting channel, and an assembly through hole B is arranged in the center of the negative electrode cover plate. The beneficial effects of the utility model are as follows: the contact area between the electrolyte of the lithium battery injection and the battery core is more uniform when the electrolyte flows into the battery, and the contact time is longer; when the injected electrolyte reaches the required amount, a prompt can be sent out and the liquid injection is stopped, so that the liquid injection process is optimized.
However, the structural design of the lithium battery case has the following problems in use:
the electrolyte injection hole of the lithium battery shell is arranged at the edge of the anode cover plate, and when electrolyte is injected into the battery cell through the electrolyte injection hole, the infiltration effect of one end of the battery cell far away from the electrolyte injection hole is poor, namely the infiltration efficiency is low; on the other hand, the sealing property of the liquid injection hole is poor, and the electrolyte leaks from the liquid injection hole, so that the performance of the battery is affected.
Therefore, there is a need for a battery structure with high impregnation efficiency and good sealing property.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a shell structure and a cylindrical battery with higher infiltration efficiency and better sealing performance.
The aim of the utility model is realized by the following technical scheme:
a housing structure, comprising:
the battery pack comprises a first end part, a second end part and an intermediate shell, wherein the intermediate shell is respectively connected with the first end part and the second end part, the first end part is used for being connected with a current collecting disc, the second end part is used for being connected with a top cover structure, a containing cavity is formed in the shell structure, and the containing cavity is used for containing a battery cell;
the first end part is provided with a containing groove, the groove wall of the containing groove is provided with a liquid injection hole, the liquid injection hole is arranged in the middle of the first end part, and the liquid injection hole and the containing groove are communicated with the containing cavity;
the shell structure further comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged in the liquid injection hole, and the first sealing piece is connected to the groove wall of the accommodating groove in an abutting mode;
the second sealing piece is positioned in the accommodating groove and is connected with the shell.
In one embodiment, the first seal abuts the second seal.
In one embodiment, the first seal is a sealant peg.
In one embodiment, the sealant nail comprises a socket part and a plug part which are connected, the plug part is positioned in the accommodating cavity, and the socket part is sleeved on the groove wall of the accommodating groove.
In one embodiment, the second end portion is provided with a first through hole, the first through hole is communicated with the accommodating cavity, and the first through hole is used for penetrating and connecting with the top cover structure, so that the top cover structure is sleeved on the second end portion.
A cylindrical battery comprises a battery core, a current collecting disc and the shell structure according to any embodiment, wherein the battery core is positioned in the accommodating cavity, the battery core is welded with the current collecting disc, and the current collecting disc is connected with the first end portion.
In one embodiment, the collecting tray is provided with a second through hole, and the second through hole is respectively communicated with the accommodating cavity and the liquid injection hole.
In one embodiment, the first sealing member sequentially penetrates through the liquid injection hole and the second through hole.
In one embodiment, a through groove is formed in the middle of the battery cell, and the through groove is respectively communicated with the liquid injection hole and the second through hole.
In one embodiment, the cylindrical battery further comprises a cap structure connected to the second end, and an end of the cap structure is connected to the cell.
Compared with the prior art, the utility model has at least the following advantages:
according to the shell structure, the accommodating cavity is formed in the shell, the battery cell is located in the accommodating cavity, the first end part is connected with the battery cell of the cylindrical battery, the liquid injection hole is formed in the middle of the first end part, and when electrolyte is injected into the accommodating cavity from the liquid injection hole, the electrolyte is infiltrated from the middle of the battery cell to the periphery, so that the battery cell is infiltrated more uniformly, and the infiltration efficiency is higher; on the other hand, the first sealing piece is penetrated and arranged in the liquid injection hole and sleeved on the first end part, and the second sealing piece is connected with the first end part, namely under the combined action of the first sealing piece and the second sealing piece, the sealing performance of the shell structure is higher, and the performance of the cylindrical battery is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a housing structure according to an embodiment;
FIG. 2 is another schematic view of the housing structure shown in FIG. 1;
FIG. 3 is a structural cross-sectional view of the housing structure shown in FIG. 1;
FIG. 4 is a schematic view of a first seal of the housing structure shown in FIG. 1;
FIG. 5 is a schematic view of a further construction of the housing structure shown in FIG. 1;
fig. 6 is a schematic structural view of a cylindrical battery according to an embodiment;
fig. 7 is a structural cross-sectional view of the cylindrical battery shown in fig. 6;
fig. 8 is an enlarged partial schematic view of the cylindrical battery shown in fig. 7 at a.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The application provides a shell structure, which comprises a first end part, a second end part and a middle shell, wherein the middle shell is respectively connected with the first end part and the second end part, the first end part is used for being connected with a current collecting disc, the second end part is used for being connected with a top cover structure, an accommodating cavity is formed in the shell structure, and the accommodating cavity is used for accommodating a battery cell; the first end part is provided with a containing groove, the groove wall of the containing groove is provided with a liquid injection hole, the liquid injection hole is arranged in the middle of the first end part, and the liquid injection hole and the containing groove are communicated with the containing cavity; the shell structure further comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged in the liquid injection hole, and the first sealing piece is connected to the groove wall of the accommodating groove in an abutting mode; the second sealing piece is positioned in the accommodating groove and is connected with the shell.
According to the shell structure, the accommodating cavity is formed in the shell, the battery cell is located in the accommodating cavity, the first end part is connected with the battery cell of the cylindrical battery, the liquid injection hole is formed in the middle of the first end part, and when electrolyte is injected into the accommodating cavity from the liquid injection hole, the electrolyte is infiltrated from the middle of the battery cell to the periphery, so that the battery cell is infiltrated more uniformly, and the infiltration efficiency is higher; on the other hand, the first sealing piece is penetrated and arranged in the liquid injection hole and sleeved on the first end part, and the second sealing piece is connected with the first end part, namely under the combined action of the first sealing piece and the second sealing piece, the sealing performance of the shell structure is higher, and the performance of the cylindrical battery is further improved.
For better understanding of the technical solutions and advantageous effects of the present application, the following details are further described with reference to specific embodiments:
as shown in fig. 1 to 5, the housing structure 10a of an embodiment includes a first end 100, a second end 200, and an intermediate housing 300, the intermediate housing 300 is connected to the first end 100 and the second end 200, respectively, the first end 100 is used for being connected to the current collecting plate 700, the second end 200 is used for being connected to the top cover structure 800, and a receiving cavity 310 is formed in the housing structure 10a, and the receiving cavity 310 is used for receiving the battery cell 600, that is, the battery cell 600 is located in the receiving cavity 310.
Further, the first end 100 is provided with a receiving groove 110, a liquid injection hole 111 is provided in a groove wall of the receiving groove 110, the liquid injection hole 111 is provided in the middle of the first end 100, and the liquid injection hole 111 and the receiving groove 110 are both communicated with the receiving cavity 310, that is, electrolyte is injected into the cell 600 through the liquid injection hole 111.
Further, the housing structure 10a further includes a first sealing member 400 and a second sealing member 500, the first sealing member 400 is disposed in the liquid injection hole 111, and the first sealing member 400 is connected to the groove wall of the accommodating groove 110 in an abutting manner; the second sealing member 500 is located in the accommodating groove 110, the second sealing member 500 is connected with the housing, and the housing structure 10a is enabled to be higher in tightness through the combined action of the first sealing member 400 and the second sealing member 500. It is understood that the connection mode of the first sealing member and the first end portion may be a connection mode of sleeving, laser welding or the like, and the connection mode of the second sealing member and the first end portion may be a connection mode of sleeving, laser welding or the like.
In this embodiment, the liquid injection hole 111 is formed on the wall of the accommodating groove 110, and the liquid injection hole 111 is located on the middle of the first end 100, so that when the electrolyte is injected into the cell 600 from the liquid injection hole 111, the cell 600 infiltrates from the middle to the periphery, so that the cell 600 infiltrates more uniformly. After the liquid injection is completed, the first sealing member 400 is inserted into the liquid injection hole 111, the first sealing member 400 is sleeved on the groove wall of the accommodating groove 110, and the second sealing member 500 is welded with the shell. In this embodiment, the second seal 500 is a sealing aluminum sheet.
In the above-mentioned housing structure 10a, the housing is internally provided with the accommodating cavity 310, the battery cell 600 is located in the accommodating cavity 310, the first end 100 is connected with the battery cell 600 of the cylindrical battery 10, the middle part of the first end 100 is provided with the liquid injection hole 111, when the electrolyte is injected into the accommodating cavity 310 from the liquid injection hole 111, the electrolyte infiltrates from the middle part of the battery cell 600 to the periphery, so that the infiltration of the battery cell 600 is more uniform, and the infiltration efficiency is higher; on the other hand, the first sealing member 400 penetrates through the liquid injection hole 111 and is sleeved on the first end portion 100, and the second sealing member 500 is connected with the first end portion 100, that is, under the combined action of the first sealing member 400 and the second sealing member 500, the sealing performance of the housing structure 10a is higher, and the performance of the cylindrical battery 10 is further improved.
In one embodiment, as shown in fig. 3, the first seal 400 abuts against the second seal 500, so that the first seal 400 is more firmly inserted into the injection hole 111.
In one embodiment, the first seal 400 is a sealant peg.
As shown in fig. 4, in one embodiment, the sealant nail comprises a socket portion 410 and a plug portion 420, wherein the socket portion 420 is located in the accommodating cavity 310, and the socket portion 410 is sleeved on the groove wall of the accommodating groove 110, so that the liquid injection hole 111 is sealed.
As shown in fig. 5, in one embodiment, the second end 200 is provided with a first through hole 210, the first through hole 210 is communicated with the accommodating cavity 310, and the first through hole 210 is used for penetrating and connecting with the top cover structure 800, so that the top cover structure 800 is sleeved on the second end 200. It can be appreciated that the top cover structure 800 is sleeved on the second end 200, and one end of the top cover structure 800 is connected with the electric core 600, so as to realize the conduction function of the cylindrical battery 10.
As shown in fig. 6 to 8, the present application further provides a cylindrical battery 10, which includes a battery cell 600, a current collecting plate 700, and a housing structure 10a according to any of the foregoing embodiments. The battery cell 600 is located in the accommodating cavity 310, the battery cell 600 is welded with the current collecting disc 700, and the current collecting disc 700 is connected with the first end 100, i.e. the first end 100 is connected with the battery cell 600 through the current collecting disc 700.
As shown in fig. 8, in one embodiment, the collecting tray 700 is provided with a second through hole 710, and the second through hole 710 is respectively communicated with the accommodating cavity 310 and the liquid injection hole 111. It will be appreciated that electrolyte is injected into the interior of the housing from the injection hole 111 and the second through hole 710.
As shown in fig. 7, in one embodiment, the first sealing member 400 sequentially penetrates through the liquid injection hole 111 and the second through hole 710, so that the sealing performance of the first end 100 of the housing is high, and the electrolyte is prevented from leaking out from the second through hole 710 or the liquid injection hole 111.
As shown in fig. 7, in one embodiment, a through groove 610 is formed in the middle of the battery cell 600, and the through groove 610 is respectively communicated with the liquid injection hole 111 and the second through hole 710. It can be appreciated that in the manufacturing process of the battery cell 600, the pole piece and the diaphragm are wound to form the through groove 610, the electrolyte is injected into the second through hole 710 from the liquid injection hole 111 and finally injected into the through groove 610, and at this time, the electrolyte is absorbed by the diaphragm of the through groove 610 and then wets the whole battery cell 600.
As shown in fig. 6 and 7, in one embodiment, the cylindrical battery 10 further includes a cap structure 800, the cap structure 800 being connected to the second end 200, and the end of the cap structure 800 being connected to the battery cell 600. It can be understood that the top cover structure 800 is connected to one end of the winding core, the other end of the winding core is connected to the current collecting plate 700, and the current collecting plate 700 and the top cover structure 800 are connected to the housing structure 10a, so as to realize the conduction function of the cylindrical battery 10.
Compared with the prior art, the utility model has at least the following advantages:
according to the shell structure, the accommodating cavity is formed in the shell, the battery cell is located in the accommodating cavity, the first end part is connected with the battery cell of the cylindrical battery, the liquid injection hole is formed in the middle of the first end part, and when electrolyte is injected into the accommodating cavity from the liquid injection hole, the electrolyte is infiltrated from the middle of the battery cell to the periphery, so that the battery cell is infiltrated more uniformly, and the infiltration efficiency is higher; on the other hand, the first sealing piece is penetrated and arranged in the liquid injection hole and sleeved on the first end part, and the second sealing piece is connected with the first end part, namely under the combined action of the first sealing piece and the second sealing piece, the sealing performance of the shell structure is higher, and the performance of the cylindrical battery is further improved.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A shell structure, which comprises a first end part, a second end part and an intermediate shell, wherein the intermediate shell is respectively connected with the first end part and the second end part, the first end part is used for being connected with a current collecting disc, the second end part is used for being connected with a top cover structure, a containing cavity is arranged in the shell structure and used for containing an electric core,
the first end part is provided with a containing groove, the groove wall of the containing groove is provided with a liquid injection hole, the liquid injection hole is arranged in the middle of the first end part, and the liquid injection hole and the containing groove are communicated with the containing cavity;
the shell structure further comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged in the liquid injection hole, and the first sealing piece is connected to the groove wall of the accommodating groove in an abutting mode;
the second sealing piece is positioned in the accommodating groove and is connected with the shell.
2. The housing structure of claim 1 wherein the first seal abuts the second seal.
3. The housing structure of claim 1 wherein the first seal member is a sealant peg.
4. The housing structure of claim 3, wherein the sealant nail comprises a socket part and a plug part, wherein the socket part and the plug part are connected, the plug part is positioned in the accommodating cavity, and the socket part is sleeved on the groove wall of the accommodating groove.
5. The housing structure of claim 1, wherein the second end portion is provided with a first through hole, the first through hole is communicated with the accommodating cavity, and the first through hole is used for penetrating and connecting with the top cover structure so that the top cover structure is sleeved on the second end portion.
6. A cylindrical battery comprising a battery cell, a current collecting disc and the shell structure of any one of claims 1 to 5, wherein the battery cell is positioned in the accommodating cavity, the battery cell is welded with the current collecting disc, and the current collecting disc is connected with the first end part.
7. The cylindrical battery of claim 6, wherein the current collecting plate is provided with a second through hole, and the second through hole is respectively communicated with the accommodating cavity and the liquid injection hole.
8. The cylindrical battery of claim 7, wherein the first seal member is sequentially disposed through the liquid injection hole and the second through hole.
9. The cylindrical battery of claim 7, wherein a through groove is formed in the middle of the electric core, and the through groove is respectively communicated with the liquid injection hole and the second through hole.
10. The cylindrical battery of claim 6, further comprising a cap structure connected to the second end, the cap structure having an end connected to the electrical cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321039295.4U CN220456614U (en) | 2023-05-04 | 2023-05-04 | Shell structure and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321039295.4U CN220456614U (en) | 2023-05-04 | 2023-05-04 | Shell structure and cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220456614U true CN220456614U (en) | 2024-02-06 |
Family
ID=89727661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321039295.4U Active CN220456614U (en) | 2023-05-04 | 2023-05-04 | Shell structure and cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220456614U (en) |
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2023
- 2023-05-04 CN CN202321039295.4U patent/CN220456614U/en active Active
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