CN219067002U - Top cover structure of cylindrical battery - Google Patents
Top cover structure of cylindrical battery Download PDFInfo
- Publication number
- CN219067002U CN219067002U CN202320004942.1U CN202320004942U CN219067002U CN 219067002 U CN219067002 U CN 219067002U CN 202320004942 U CN202320004942 U CN 202320004942U CN 219067002 U CN219067002 U CN 219067002U
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- CN
- China
- Prior art keywords
- shell
- top cover
- cover structure
- cylindrical battery
- rivet
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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 discloses a top cover structure of a cylindrical battery. The novel battery cell comprises a substrate which is matched and connected with an opening of a shell, wherein a step extends towards the inside of the shell, the outer peripheral surface of the step is matched with the inner wall of the shell, the end surface of the step, which is close to the inside of the shell, is matched and connected with lower plastic, a plurality of inclined bosses which extend towards the inner wall of the shell are arranged at intervals on the outer peripheral surface of the lower plastic, the end surface of the inclined bosses, which is far away from the inside of the shell, is the largest diameter surface, the end surface of the inclined bosses, which is close to the inside of the shell, is the smallest diameter surface, and the inclined bosses incline towards the battery cell along the outer side wall of the lower plastic from the largest diameter surface to the smallest diameter surface, and the largest diameter surface of the inclined bosses and the inner wall of the shell are in interference fit. According to the utility model, the basic orientation of the top cover entering the shell is predetermined through the inclined boss, so that the shell is not scratched due to larger position deviation in the subsequent matching connection process of the top cover and the shell.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to a top cover structure of a cylindrical battery.
Background
The cylindrical battery top cover generally comprises a base plate and lower plastic, and is different from the welding mode that the square battery top cover enters the shell, the welding mode between the cylindrical battery cover plate and the shell is side-to-side welding, and therefore the base plate in the top cover extends to the inner direction of the shell to form a step matched with the inner installation of the shell.
When the cylindrical battery top cover is assembled with the shell, the substrate step in the top cover preferentially enters the inside of the shell, the substrate step is easy to scratch the aluminum shell due to uncertainty of the substrate entering direction, slender aluminum wires are generated, the fallen aluminum wires drop to the lug, the lug is easy to puncture, the battery cell diaphragm is scratched, and the positive electrode material and the negative electrode material of the battery cell are contacted, so that the battery is short-circuited.
In order to solve the problem, an upward inclined chamfer is generally arranged around the edge of the bottom end of the substrate, but the chamfer can only reduce the risk of forming aluminum wires, and cannot completely and effectively solve the problem of forming aluminum wires.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a top cover structure of a cylindrical battery, and the basic orientation of the top cover entering a shell is predetermined by arranging a plurality of inclined bosses on the peripheral surface of lower plastic at intervals, so that the top cover and the shell cannot be scratched by the shell caused by larger position deviation in the subsequent matching and connecting process.
In order to achieve the above object, the present utility model provides a top cover structure of a cylindrical battery, for packaging a cylindrical housing, the top cover structure comprising a base plate cooperatively connected with an opening of the housing, wherein: the base plate extends towards inside the casing and has the step, step outer peripheral face and shells inner wall assorted, the terminal surface cooperation that the step is close to shells inside is connected with down the plastic, it is provided with the slope boss that a plurality of extends towards shells inner wall to go down the plastic outer peripheral face interval, the slope boss is kept away from shells inside place terminal surface and is the maximum diameter face, the slope boss is close to shells inside place terminal surface and is the minimum diameter face, slope boss is from maximum diameter face to minimum diameter face along lower plastic lateral wall orientation electric core direction slope, just slope boss maximum diameter face is interference fit with shells inner wall.
Further, the minimum diameter surface diameter of the inclined boss is the same as the diameter of the outer side wall of the lower plastic.
Still further, the step is provided with a chamfer near the end face edge of the inside of the case, the chamfer being inclined toward the outside of the case.
Furthermore, the base plate is connected with the lower plastic through rivets, sealing rings for sealing are arranged around the rivet holes of the base plate, and the sealing rings are embedded in the base plate.
Still further, the rivet head is close to inside the casing, the rivet afterbody is kept away from inside the casing, be provided with the connection piece between rivet and the lower plastic, connection piece and rivet fixed connection.
Further, the connecting sheet is fixedly connected with the rivet through ultrasonic welding.
Furthermore, the outer end face of the substrate riveting hole is provided with a riveting pressing block for receiving the tail part of the rivet, and an insulating gasket is arranged between the riveting pressing block and the substrate.
Further, the lower plastic is an integral molding.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the plurality of inclined bosses extending towards the inner wall of the shell are arranged on the outer peripheral surface of the lower plastic at intervals, when the top cover is in fit connection with the shell, the lower plastic enters the shell, and as the largest diameter surface of the inclined bosses on the outer peripheral surface of the lower plastic is in interference fit with the inner wall of the shell, the basic orientation of the top cover entering the shell can be predetermined, so that the top cover and the shell cannot be scratched due to larger position offset in the subsequent fit connection process;
2. on the basis of the inclined boss, the chamfer is arranged at the edge of the end face of the step, which is close to the inside of the shell, when the plastic completely enters the shell, the substrate in the top cover starts to enter the shell, and the chamfer at the edge of the end face of the step can buffer the size difference between the maximum diameter face of the inclined boss and the end face of the step, so that the shell is completely prevented from being scratched;
according to the top cover structure of the cylindrical battery, the basic orientation of the top cover entering the shell is predetermined through the plurality of inclined bosses arranged on the peripheral surface of the lower plastic at intervals, so that the shell is not scratched due to larger position deviation in the subsequent matching connection process of the top cover and the shell, the shell can be better protected, and the short circuit of the battery is further effectively prevented.
Drawings
Fig. 1 is a schematic view of an exploded structure of a top cap structure of a cylindrical battery according to the present utility model;
fig. 2 is a schematic perspective view of the substrate in fig. 1;
FIG. 3 is a schematic top view of the lower plastic in FIG. 1;
FIG. 4 is a schematic perspective view of the lower plastic in FIG. 1;
fig. 5 is a schematic cross-sectional view of the cap structure of the cylindrical battery of the present utility model after installation;
in the figure: riveting pressing block 1, insulating gasket 2, base plate 3, sealing ring 4, lower plastic 5, connecting piece 6, rivet 7, shell 8;
the substrate 3 includes: step 3-1, chamfer 3-2;
the lower plastic 5 comprises: and inclined bosses 5-1.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise. "plurality" means "two or more".
As shown in fig. 1 to 5, the top cover structure of the cylindrical battery is used for packaging a cylindrical shell 8, the top cover structure comprises a base plate 3 which is in matched connection with an opening of the shell 8, a step 3-1 extends towards the inside of the shell 8, the outer peripheral surface of the step 3-1 is matched with the inner wall of the shell 8, the end surface of the step 3-1, which is close to the inside of the shell 8, is in matched connection with a lower plastic 5, a plurality of inclined bosses 5-1 which extend towards the inner wall of the shell 8 are arranged on the outer peripheral surface of the lower plastic 5 at intervals, the end surface of the inclined bosses 5-1, which is far away from the inside of the shell 8, is a maximum diameter surface, the end surface of the inclined bosses 5-1, which is close to the inside of the shell 8, is a minimum diameter surface, the inclined bosses 5-1 incline towards the battery core direction from the maximum diameter surface to the minimum diameter surface along the outer side wall of the lower plastic 5, and the maximum diameter surface of the inclined bosses 5-1 are in interference fit with the inner wall of the shell 8.
Preferably, the minimum diameter surface diameter of the inclined boss 5-1 is the same as the diameter of the outer side wall of the lower plastic 5 or is different from the diameter of the outer side wall of the lower plastic 5, and whether the minimum diameter surface diameter of the inclined boss 5-1 is the same as the diameter of the outer side wall of the lower plastic 5 is not a limitation of the present utility model.
In this embodiment, five uniformly dispersed inclined bosses 5-1 are disposed on the outer peripheral surface of the lower plastic 5 at intervals, the diameter of the largest diameter surface of each inclined boss 5-1 is slightly larger than the inner diameter of the shell 8, when the top cover is matched and connected with the shell 8, the lower plastic 5 enters the shell, and the largest diameter surface of each inclined boss 5-1 on the outer peripheral surface of the lower plastic 5 is in interference fit with the inner wall of the shell, so that the basic orientation of the top cover entering the shell 8 can be predetermined, and the top cover and the shell 8 cannot be scratched by the shell 8 caused by larger position offset in the subsequent matching and connection process.
In addition, the end surface edge of the step 3-1 near the inside of the housing 8 is provided with a chamfer 3-2, and the chamfer 3-2 is inclined toward the outside of the housing 8.
According to the utility model, on the basis of the inclined boss 5-1, the chamfer 3-2 is arranged on the end face edge of the step 3-1, which is close to the inner part of the shell 8, when the plastic 5 completely enters the shell 8, the substrate 3 in the top cover starts to enter the shell 8, and the chamfer 3-2 on the end face edge of the step 3-1 can buffer the size difference between the maximum diameter face of the inclined boss 5-1 and the end face of the step 3-1, so that the shell is completely prevented from being scratched to generate aluminum wires, and further the aluminum wires are completely prevented from penetrating through lugs to scratch the coiled core diaphragm.
Specifically, the base plate 3 and the lower plastic 5 are connected through rivets 7, sealing rings 4 used for sealing are arranged around the rivet holes of the base plate 3, and the sealing rings 4 are embedded in the base plate 3. The lower plastic 5 is in sealing connection with the base plate 3 through a sealing ring 4.
Preferably, the head of the rivet 7 is close to the inside of the shell 8, the tail of the rivet 7 is far away from the inside of the shell 8, a connecting sheet 6 is arranged between the rivet 7 and the lower plastic 5, and the connecting sheet 6 is fixedly connected with the rivet 7. In this embodiment, the connecting piece 6 is fixedly connected with the rivet 7 through ultrasonic welding, and the connecting piece 6 leads out the battery current to the rivet 7.
The connecting sheet 6, the lower plastic 5 and the sealing ring 4 are sleeved on the rivet 7 through corresponding rivet holes in sequence.
The outer end face of the riveting hole of the base plate 3 is provided with a riveting pressing block 1 for receiving the tail part of the rivet 7, and an insulating gasket 2 is arranged between the riveting pressing block 1 and the base plate 3. The insulating gasket 2 and the riveting pressing block 1 are positioned above the base plate 3 and are sequentially sleeved above the rivet 7, the tail part of the rivet 7 is finally pressed into the groove of the riveting pressing block 1, and the assembly of the cylindrical battery cover plate assembly is completed, as shown in fig. 1.
Preferably, the lower plastic 5 is an integral piece.
According to the top cover structure of the cylindrical battery, the plurality of inclined bosses are arranged on the outer peripheral surface of the lower plastic at intervals, so that the basic direction of the top cover entering the shell is predetermined, and the shell is not scratched due to larger position deviation in the subsequent matching connection process of the top cover and the shell; in addition, the chamfer is arranged on the substrate, and the chamfer is utilized to buffer the size difference between the maximum diameter surface of the inclined boss and the end surface of the step, so that the case is completely prevented from being scratched to generate aluminum wires, and further the aluminum wires are completely prevented from penetrating through the lugs to scratch the coiled core diaphragm, so that the case can be better protected, and further the short circuit of the battery is effectively prevented.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. A top cover structure of a cylindrical battery for encapsulating a cylindrical housing (8), the top cover structure comprising a base plate (3) in mating connection with an opening of the housing (8), characterized in that: the base plate (3) extends towards the inside of casing (8) and has step (3-1), step (3-1) outer peripheral face and casing (8) inner wall assorted, step (3-1) is close to the inside terminal surface cooperation of casing (8) and is connected with down plastic (5), lower plastic (5) outer peripheral face interval is provided with a plurality of slope boss (5-1) that extend towards casing (8) inner wall, the terminal surface that casing (8) inside place is kept away from to slope boss (5-1) is the maximum diameter face, the terminal surface that casing (8) inside place is close to slope boss (5-1) is the minimum diameter face, slope boss (5-1) are down the slope of plastic (5) lateral wall towards the electric core direction from the maximum diameter face to the minimum diameter face, just slope boss (5-1) maximum diameter face is interference fit with casing (8) inner wall.
2. The top cover structure of a cylindrical battery according to claim 1, wherein: the diameter of the smallest diameter surface of the inclined boss (5-1) is the same as the diameter of the outer side wall of the lower plastic (5).
3. The top cover structure of a cylindrical battery according to claim 2, wherein: the step (3-1) is provided with a chamfer (3-2) near the end surface edge inside the shell (8), and the chamfer (3-2) inclines towards the outside of the shell (8).
4. A top cover structure of a cylindrical battery according to claim 1 or 3, wherein: the base plate (3) is connected with the lower plastic (5) through rivets (7), sealing rings (4) used for sealing are arranged around the rivet holes of the base plate (3), and the sealing rings (4) are embedded in the base plate (3).
5. The top cover structure of a cylindrical battery according to claim 4, wherein: the head of the rivet (7) is close to the inside of the shell (8), the tail of the rivet (7) is far away from the inside of the shell (8), a connecting sheet (6) is arranged between the rivet (7) and the lower plastic (5), and the connecting sheet (6) is fixedly connected with the rivet (7).
6. The top cover structure of a cylindrical battery according to claim 5, wherein: the connecting sheet (6) is fixedly connected with the rivet (7) through ultrasonic welding.
7. The top cover structure of a cylindrical battery according to claim 5, wherein: the riveting press block (1) for receiving the tail part of the rivet (7) is arranged on the outer end face of the riveting hole of the substrate (3), and an insulating gasket (2) is arranged between the riveting press block (1) and the substrate (3).
8. The top cover structure of a cylindrical battery according to claim 1, wherein: the lower plastic (5) is an integral molding piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320004942.1U CN219067002U (en) | 2023-01-03 | 2023-01-03 | Top cover structure of cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320004942.1U CN219067002U (en) | 2023-01-03 | 2023-01-03 | Top cover structure of cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219067002U true CN219067002U (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320004942.1U Active CN219067002U (en) | 2023-01-03 | 2023-01-03 | Top cover structure of cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219067002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914336A (en) * | 2023-09-07 | 2023-10-20 | 厦门海辰储能科技股份有限公司 | Single battery, energy storage device and electric equipment |
-
2023
- 2023-01-03 CN CN202320004942.1U patent/CN219067002U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914336A (en) * | 2023-09-07 | 2023-10-20 | 厦门海辰储能科技股份有限公司 | Single battery, energy storage device and electric equipment |
| CN116914336B (en) * | 2023-09-07 | 2024-01-23 | 厦门海辰储能科技股份有限公司 | Single battery, energy storage device and electric equipment |
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