CN219873770U - Battery shell structure and battery - Google Patents
Battery shell structure and battery Download PDFInfo
- Publication number
- CN219873770U CN219873770U CN202320080929.4U CN202320080929U CN219873770U CN 219873770 U CN219873770 U CN 219873770U CN 202320080929 U CN202320080929 U CN 202320080929U CN 219873770 U CN219873770 U CN 219873770U
- Authority
- CN
- China
- Prior art keywords
- shell
- positive pole
- battery
- post
- insulating pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 51
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000011258 core-shell material Substances 0.000 abstract 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 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
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to the technical field of batteries, in particular to a battery shell structure and a battery, wherein the battery shell structure comprises a shell and a positive pole post structure arranged on one side of the shell, the positive pole post structure comprises a positive pole post, an inner sealing insulating pad and an outer sealing insulating pad, the positive pole post penetrates out of the shell from the inside of the shell to the outside of the shell, a blind hole is formed in the positive pole post, the inner sealing insulating pad is positioned between the positive pole post and the inner wall of the shell and used for sealing insulation between the positive pole post and the inside of the shell, the outer sealing insulating pad is positioned between the positive pole post and the outer wall of the shell and used for sealing insulation between the positive pole post and the outside of the shell, and a gasket is positioned between the positive pole post and the outer sealing insulating pad and used for reinforcing buckling strength of the outer pole post and flanging when the positive pole post is riveted. According to the utility model, the blind hole is formed in the pole column, so that the problem that the traditional pole lug and the anode column of the conventional battery are directly welded by external laser is solved, the space in the battery core shell is increased, and the energy density of the battery is increased.
Description
Technical Field
The present disclosure relates to battery technology, and particularly to a battery housing structure and a battery.
Background
The lithium ion battery has the advantages of high energy density, long cycle life and the like, and is widely applied to the fields of portable electronic products, electric automobiles and the like. In lithium ion batteries, the quality of the battery casing has a large impact on the overall life of the battery. As the demand for batteries in various fields is increasing, how to improve the high-current charge and discharge characteristics of lithium ion secondary batteries has become one of the current research hotspots. Relevant technicians find that the prior battery anode post is welded with the inner electrode lug or lug group of the battery, and the lug needs to be bent, so that the space utilization rate of the battery is reduced, and the energy density is not improved to the limit.
Disclosure of Invention
In view of the above, the present utility model is to provide a battery housing structure and a battery, which are used for solving the problems that the space utilization rate of the battery is reduced and the energy density is not improved to the limit because the positive electrode post of the battery and the electrode tab or the electrode tab group of the battery are welded internally.
The utility model solves the technical problems by the following technical means:
in a first aspect, the present utility model provides a battery case structure including a case and a positive electrode post structure mounted at one side of the case, the positive electrode post structure including:
the positive pole post penetrates out of the shell from the inside of the shell to the outside of the shell, and a blind hole is formed in the positive pole post;
the inner sealing insulating pad is positioned between the positive pole post and the inner wall of the shell and is used for sealing and insulating the positive pole post and the inside of the shell;
the external sealing insulating pad is positioned between the gasket and the outer wall of the shell and used for sealing and insulating the positive pole post and the outside of the shell;
the gasket is positioned between the positive pole and the external sealing insulating pad and is used for reinforcing the buckling strength of the external pole and facilitating flanging during riveting of the positive pole.
With reference to the first aspect, in some optional embodiments, the positive electrode post includes an integrally formed welding plate and a socket barrel, the welding plate is located inside the housing, the socket barrel passes through the post hole, and the socket barrel located at the outer portion of the housing is turned outwards to form a folded edge.
With reference to the first aspect, in some optional embodiments, a seal cavity for sealing between the casing and the positive electrode post is formed between the flange and the welding plate, and the inner seal insulating pad, the outer seal insulating pad and the gasket are all penetrated in the seal cavity in the positive electrode post.
With reference to the first aspect, in some optional embodiments, an outer wall of the socket barrel is formed with a step, and the socket barrel is turned outwards from the step.
With reference to the first aspect, in some alternative embodiments, an end of the gasket that contacts the positive electrode post abuts against the step.
With reference to the first aspect, in some optional embodiments, the outer sealing insulating pad is sleeved on the plug tube in an annular shape, a protrusion is formed on the outer sealing insulating pad, and the protrusion portion is inserted into the pole hole.
With reference to the first aspect, in some optional embodiments, a side of the housing is further provided with a liquid injection hole.
With reference to the first aspect, in some optional embodiments, the positive electrode post is welded with a cell tab or tab group inside the battery by using an external laser.
In a second aspect, the present utility model provides a battery comprising the battery housing structure described above.
Compared with the prior art, the utility model has the following beneficial effects:
the battery shell is provided with the inner sealing insulating pad and the outer sealing insulating pad which are respectively used for sealing and insulating the inside and the outside of the shell and the positive pole, so that the sealing effect is better, and the connection reliability of the positive pole of the battery and the shell is improved; the blind holes are arranged in the positive pole post structure, so that the thickness of the welding part of the pole post is reduced, the external laser welding of the positive pole post and the battery core lug or lug group inside the battery can be realized, the cold welding is avoided, the connecting strips are saved, the internal space is saved, and the design of higher energy density capacity is realized.
Drawings
Fig. 1 is a schematic side cross-sectional view of a battery housing structure of the present utility model;
fig. 2 is a schematic front cross-sectional view of the cell housing structure of the present utility model;
FIG. 3 is a schematic view of a cell housing aperture of the present utility model;
fig. 4 is a schematic view of a non-folded structure of the positive electrode post;
the battery comprises a shell 1, a positive pole 2, a welding plate 21, a plug cylinder 22, an inner sealing insulating pad 3, an outer sealing insulating pad 4, a pole hole 5, a blind hole 6, a battery cell pole lug/pole lug group 7, a gasket 8, a liquid injection hole 9, a battery core 10, a step 11, a folded edge 12 and a bulge 13.
Detailed Description
The following embodiments of the present utility model are described in terms of specific examples, and those skilled in the art will appreciate the advantages and capabilities of the present utility model from the disclosure herein. It should be noted that, the illustrations provided in the following embodiments are for illustration only, and are shown in schematic drawings, not physical drawings, and are not to be construed as limiting the utility model, and in order to better illustrate the embodiments of the utility model, certain components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
In the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is merely for convenience in describing the present utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration, and should not be construed as limiting the present utility model, and that the specific meanings used above may be understood by those of ordinary skill in the art according to circumstances.
Example 1
As shown in fig. 1-3, the present embodiment discloses a battery housing structure, including a housing 1 and a positive electrode post structure mounted on one side of the housing 1, wherein a battery core 10 is placed inside the housing 1, and the positive electrode post structure includes: the positive pole 2, the inner sealing insulating pad 3, the outer sealing insulating pad 4 and the gasket 8 are arranged on the shell 1, the positive pole 2 is arranged in the positive pole hole 5 in a penetrating mode, and then the positive pole 2 penetrates out of the shell 1 from the inside of the shell 1. Referring to fig. 4, the positive electrode post 2 includes an integrally formed welding plate 21 and a socket 22, the outer wall of the socket 22 is formed with a step 11, the welding plate 21 is located inside the housing 1, and the socket 22 passes through the post hole 5. The plug tube 22 positioned at the outer side part of the shell 1 is outwards folded from the step 11 to form the folded edge 12, a sealing cavity for sealing the shell 1 and the positive pole 2 is formed between the folded edge 12 and the welding plate 21, a blind hole 6 is formed at the middle position of the plug tube 22 after being folded, the blind hole 6 positioned at the middle position of the positive pole 2 is designed, the central thickness of the positive pole 2 is thinned, the positive pole 2 and the battery inner battery core lugs/lug groups 7 can be welded by adopting external laser, the false welding is avoided, the connecting strips are saved, the inner space is saved, and the design of higher energy density capacity is realized.
The inner sealing insulating pad 3 is located between the positive electrode post 2 and the inner wall of the shell 1, and is used for sealing and insulating the positive electrode post 2 and the interior of the shell 1, and the inner sealing insulating pad 3 is annularly sleeved on the positive electrode post 2 and completely covers the upper surface of the welding plate 21.
The outer sealing insulating pad 4 is located between the positive electrode post 2 and the outer wall of the shell 1, and is used for sealing insulation between the positive electrode post 2 and the outside of the shell 1, the outer sealing insulating pad 4 is annular and sleeved on the plug tube 22 of the positive electrode post 2, the outer sealing insulating pad 4 is provided with a bulge 13 in a molding mode, and part of the bulge 13 is inserted into the electrode post hole 5 and is in contact with the inner sealing insulating pad 3. The gasket 8 is located between the positive pole 2 and the external sealing insulating pad 4, and is used for enhancing the buckling strength of the external pole and facilitating flanging when the positive pole 2 is riveted, and the end part of the gasket 8, which is in contact with the positive pole 2, is abutted against the step 11. The inner sealing insulating pad 3, the outer sealing insulating pad 4 and the gasket 8 are all arranged in the sealing cavity in the positive electrode pole 2 in a penetrating way.
One side of the shell 1 is also provided with a liquid injection hole 9, and the liquid injection hole 9 and the positive pole post 2 can be positioned on the same side wall of the shell 1 or on different side walls of the shell 1.
In the battery structure of the present embodiment, the positive electrode post 2 may be circular, elliptical or other irregular or regular shape, and the positive electrode post 2 may be made of aluminum or aluminum alloy or other metal or alloy material, and the casing 1 may be made of aluminum/steel or other alloy material. The battery shell is manufactured into a shell through mechanical forming, a pole hole 5 is formed in the side wall of the shell, a positive pole 2, an inner sealing insulating pad 3, an outer sealing insulating pad 4 and a gasket 8 are combined together in a riveting mode to form a positive pole structure, the shell 1 serves as a negative pole, the inner sealing insulating pad 3 is sleeved on the positive pole 2, the positive pole 2 is assembled on the shell 1, namely, a plug cylinder 22 penetrates through the pole hole 5, the outer sealing insulating pad 4 is sleeved on the plug cylinder 22, a protrusion 13 part of the outer sealing insulating pad 4 is inserted into the pole hole 5, the gasket 8 is sleeved on a step of the plug cylinder 22, and finally the plug cylinder 22 is outwards folded from the step to rivet a sealing component, namely, the inner sealing insulating pad 3, the outer sealing insulating pad 4 and the gasket 8 are riveted.
Example 2
This embodiment discloses a battery including the battery case structure described in embodiment 1.
The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model. The technology, shape, and construction parts of the present utility model, which are not described in detail, are known in the art.
Claims (9)
1. The utility model provides a battery housing structure which characterized in that, include casing and install the positive pole post structure in casing one side, positive pole post structure includes:
the positive pole post penetrates out of the shell from the inside of the shell to the outside of the shell, and a blind hole is formed in the positive pole post;
the inner sealing insulating pad is positioned between the positive pole post and the inner wall of the shell and is used for sealing and insulating the positive pole post and the inside of the shell;
the external sealing insulating pad is positioned between the gasket and the outer wall of the shell and used for sealing and insulating the positive pole post and the outside of the shell;
the gasket is positioned between the positive pole and the external sealing insulating pad and is used for reinforcing the buckling strength of the external pole and facilitating flanging during riveting of the positive pole.
2. The battery case structure according to claim 1, wherein the positive electrode post comprises a welding plate and a plug tube which are integrally formed, the welding plate is located in the case, the plug tube penetrates through the post hole, and the plug tube located in the outer portion of the case is folded outwards to form a folded edge.
3. The battery case structure according to claim 2, wherein a seal chamber for sealing between the case and the positive electrode post is formed between the flange and the welding plate, and the inner seal insulating gasket, the outer seal insulating gasket and the gasket are all penetrated in the seal chamber in the positive electrode post.
4. A battery housing structure according to claim 3, wherein the outer wall of the plug tube is formed with a step, and the plug tube is folded outwardly from the step.
5. The battery case structure according to claim 4, wherein an end of the gasket in contact with the positive electrode post abuts against the step.
6. The battery case structure according to claim 2, wherein the outer seal insulating pad is annularly sleeved on the plug tube, and a protrusion is formed on the outer seal insulating pad.
7. The battery case structure according to claim 1, wherein a liquid injection hole is further provided at one side of the case.
8. The battery case structure according to any one of claims 1 to 7, wherein the positive electrode post is welded to a cell tab or tab group inside the battery by external laser.
9. A battery comprising the battery housing structure of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320080929.4U CN219873770U (en) | 2023-01-13 | 2023-01-13 | Battery shell structure and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320080929.4U CN219873770U (en) | 2023-01-13 | 2023-01-13 | Battery shell structure and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219873770U true CN219873770U (en) | 2023-10-20 |
Family
ID=88345027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320080929.4U Active CN219873770U (en) | 2023-01-13 | 2023-01-13 | Battery shell structure and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219873770U (en) |
-
2023
- 2023-01-13 CN CN202320080929.4U patent/CN219873770U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |