CN220627982U - Rolling core packaging mechanism for cylindrical lithium battery and cylindrical lithium battery - Google Patents
Rolling core packaging mechanism for cylindrical lithium battery and cylindrical lithium battery Download PDFInfo
- Publication number
- CN220627982U CN220627982U CN202322230464.9U CN202322230464U CN220627982U CN 220627982 U CN220627982 U CN 220627982U CN 202322230464 U CN202322230464 U CN 202322230464U CN 220627982 U CN220627982 U CN 220627982U
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- Prior art keywords
- cylindrical lithium
- lithium battery
- winding core
- groove
- packaging mechanism
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 55
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 24
- 238000005096 rolling process Methods 0.000 title description 2
- 230000002093 peripheral effect Effects 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000005538 encapsulation Methods 0.000 claims abstract 2
- 238000004804 winding Methods 0.000 claims description 34
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 abstract description 27
- 239000002893 slag Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application provides a cylinder is core encapsulation mechanism and cylinder lithium cell for lithium cell. The coil core packaging mechanism for the cylindrical lithium battery comprises a battery shell and a top cover, wherein the battery shell is provided with an opening and a containing groove which are communicated with each other, and the containing groove is used for containing a coil core; the top cover comprises an abutting part and a sealing cover part which are mutually connected, the abutting part is positioned in the accommodating groove, a limiting ring groove is formed at the joint of the abutting part and the sealing cover part, the peripheral wall of the opening is welded with the peripheral wall of the limiting ring groove, so that the sealing cover part is covered and connected with the battery shell, an annular bevel edge is formed on the sealing cover part adjacent to the outer periphery of the limiting ring groove, and an overflow groove is formed between the annular bevel edge and the battery shell. Because the overflow groove is formed between the annular bevel edge and the battery shell, when the peripheral wall of the limit ring groove is welded with the peripheral wall of the opening, welding slag generated by welding the annular bevel edge and the battery shell flows out through the overflow groove, a boss is prevented from being formed at the welding position of the top cover and the battery shell, the grouping efficiency of Pack is improved, and therefore the production efficiency of the cylindrical lithium battery is improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a winding core packaging mechanism for a cylindrical lithium battery and the cylindrical lithium battery.
Background
Nowadays, with the rapid development of new energy technology, cylindrical lithium batteries are widely applied to the technical fields of national defense safety, transportation, industrial production and the like due to the advantages of high energy density, long service life, high safety and the like.
In the manufacturing process of the cylindrical lithium battery, after the winding core is assembled into the battery shell, the top cover and the battery shell are welded to encapsulate the winding core in the battery shell. However, as shown in fig. 1, the peripheral wall of the opening of the existing battery case is relatively flat, when the top cover is welded on the peripheral wall of the opening of the battery case, welding slag is generated, and a boss is formed at the welding position of the top cover and the welding slag after the welding slag overflows, so that the tolerance of the cylindrical lithium battery is too large, the Pack (Pack refers to packaging, packaging and assembling the battery cells to form a finished battery for practical use) is affected, and the production efficiency of the cylindrical lithium battery is reduced.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a cylindrical lithium battery and a winding core packaging mechanism for the cylindrical lithium battery, wherein an annular inclined edge is formed on the outer periphery of a sealing cover part adjacent to a limiting ring groove, and an overflow groove is formed between the annular inclined edge and a battery case, so that welding slag generated by welding the peripheral wall of the limiting ring groove and the peripheral wall of an opening flows out through the overflow groove, thereby avoiding a boss from being formed at a welding position of a top cover and the battery case, and further improving the grouping efficiency of Pack.
The aim of the utility model is realized by the following technical scheme:
the winding core packaging mechanism for the cylindrical lithium battery comprises a battery shell and a top cover, wherein the battery shell is provided with an opening and a containing groove which are communicated with each other, and the containing groove is used for containing a winding core; the top cover comprises an abutting part and a sealing cover part which are connected with each other, the abutting part is positioned in the accommodating groove, a limiting ring groove is formed at the joint of the abutting part and the sealing cover part, the peripheral wall of the opening is welded with the peripheral wall of the limiting ring groove, so that the sealing cover part is covered and connected with the battery case, an annular bevel edge is formed on the outer periphery of the sealing cover part adjacent to the limiting ring groove, and an overflow groove is formed between the annular bevel edge and the battery case.
In one embodiment, an avoidance bevel edge is formed on the outer periphery of the abutting part far away from the sealing cover part, and an avoidance channel is formed between the avoidance bevel edge and the inner wall of the accommodating groove.
In one embodiment, the abutting portion and the capping portion are integrally formed.
In one embodiment, the battery case is cylindrical, and the abutting portion and the cover portion are circular ring-shaped.
In one embodiment, the maximum diameter of the abutment is equal to the diameter of the opening, and the maximum diameter of the cover is greater than the diameter of the opening.
In one embodiment, the top cover is in the shape of an inverted circular truncated cone.
In one embodiment, the battery case is a steel case or an aluminum case.
In one embodiment, the top cover is a steel cover or an aluminum cover.
In one embodiment, the winding core packaging mechanism for the cylindrical lithium battery further comprises a current collecting disc, a pole and lower plastic, the lower plastic is connected with the abutting part, the current collecting disc is located between the winding core and the lower plastic, two sides of the current collecting disc are respectively and electrically connected with the winding core and the pole, and the pole sequentially penetrates through the lower plastic and the top cover.
The cylindrical lithium battery comprises a winding core and the winding core packaging mechanism for the cylindrical lithium battery, wherein the winding core is accommodated in the accommodating groove.
Compared with the prior art, the utility model has at least the following advantages:
the joint of butt portion and closing cap portion is formed with spacing annular, through carrying out the welding with spacing annular perisporium and open-ended perisporium, so that closing cap portion lid is established and is connected in the battery case, because the peripheral edge that closing cap portion was adjacent spacing annular is formed with annular hypotenuse, and be formed with the overflow launder between annular hypotenuse and the battery case, consequently, when carrying out the welding with spacing annular perisporium and open-ended perisporium, because of the welding slag that the two welding produced flows out through the overflow launder, the welding position formation boss of top cap and battery case has been avoided, pack's group efficiency has been improved, thereby the production efficiency of cylinder lithium cell has been improved, and the design space of cylinder lithium cell has been increased, and then Pack's energy density has been improved, make the performance of cylinder lithium cell better.
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 top cover and a battery case according to the prior art;
fig. 2 is a schematic structural diagram of a cylindrical lithium battery according to an embodiment;
fig. 3 is an exploded view of the cylindrical lithium battery shown in fig. 2;
fig. 4 is a schematic structural view of a top cover in a winding core packaging mechanism for a cylindrical lithium battery according to an embodiment;
fig. 5 is another structural schematic diagram of the cylindrical lithium battery shown in fig. 2;
FIG. 6 is a cross-sectional view of the cylindrical lithium battery shown in FIG. 5 taken along line A-A;
fig. 7 is an enlarged view of the cylindrical lithium battery shown in fig. 6 at b.
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 coil core packaging mechanism for a cylindrical lithium battery, which comprises a battery shell and a top cover, wherein the battery shell is provided with an opening and a containing groove which are communicated with each other, and the containing groove is used for containing a coil core; the top cover comprises an abutting part and a sealing cover part which are connected with each other, the abutting part is positioned in the accommodating groove, a limiting ring groove is formed at the joint of the abutting part and the sealing cover part, the peripheral wall of the opening is welded with the peripheral wall of the limiting ring groove, so that the sealing cover part is covered and connected with the battery case, an annular bevel edge is formed on the outer periphery of the sealing cover part adjacent to the limiting ring groove, and an overflow groove is formed between the annular bevel edge and the battery case.
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:
referring to fig. 2 to 7, a winding core packaging mechanism 10 for a cylindrical lithium battery in a cylindrical lithium battery 10a according to an embodiment of the utility model includes a battery case 100 and a top cover 200, wherein the battery case 100 is formed with an opening 101 and a receiving groove 102 that are mutually communicated, and the receiving groove 102 is used for receiving the winding core 20; the top cover 200 includes an abutting portion 210 and a cover portion 220 that are connected to each other, the abutting portion 210 is located in the accommodating groove 102, a limiting ring groove 201 is formed at a connection portion between the abutting portion 210 and the cover portion 220, a peripheral wall of the opening 101 is welded to a peripheral wall of the limiting ring groove 201, so that the cover portion 220 is covered and connected to the battery case 100, an annular bevel edge 222 is formed adjacent to an outer peripheral edge of the cover portion 220, and an overflow groove 11 is formed between the annular bevel edge 222 and the battery case 100.
In this embodiment, the battery case 100 is formed with an opening 101 and a receiving groove 102, the winding core 20 is placed in the receiving groove 102 through the opening 101, the top cover 200 includes an abutting portion 210 and a cover portion 220, the abutting portion 210 is placed in the receiving groove 102, and the connection portion between the abutting portion 210 and the cover portion 220 forms a limiting ring groove 201, and the peripheral wall of the limiting ring groove 201 and the peripheral wall of the opening 101 are welded to cover the cover portion 220 to be connected to the battery case 100; it can be understood that the sealing cover 220 is formed with an annular bevel edge 222 adjacent to the outer periphery of the limit ring groove 201, and an overflow groove 11 is formed between the annular bevel edge 222 and the battery case 100, so that when the peripheral wall of the limit ring groove 201 and the peripheral wall of the opening 101 are welded, welding slag generated by welding the two flows out through the overflow groove 11, so that a boss is prevented from being formed at the welding position of the top cover 200 and the battery case 100, the Pack grouping efficiency is improved, the production efficiency of the cylindrical lithium battery 10a is improved, the design space of the cylindrical lithium battery 10a is increased, the energy density of the Pack is further improved, and the usability of the cylindrical lithium battery 10a is better; it should be noted that, because the wall thickness of the battery case 100 is smaller than that of the top cover 200, compared with the method of forming the annular gap on the battery case 100 to enable the welding slag to flow out through the annular gap, the operation of forming the annular gap on the battery case 100 is canceled, and the risk of welding through the battery case 100 in the welding process of the battery case 100 and the top cover 200 is avoided, so that the winding core 20 in the battery case 100 is better protected, and the problem of battery short circuit caused by burning of the winding core 20 is avoided.
In this embodiment, the connection between the abutting portion 210 and the sealing cover portion 220 is formed with the limiting ring groove 201, and the peripheral wall of the limiting ring groove 201 and the peripheral wall of the opening 101 are welded, so that the sealing cover portion 220 is covered and connected to the battery case 100, and since the sealing cover portion 220 is formed with the annular bevel edge 222 adjacent to the outer periphery of the limiting ring groove 201, and the overflow groove 11 is formed between the annular bevel edge 222 and the battery case 100, when the peripheral wall of the limiting ring groove 201 and the peripheral wall of the opening 101 are welded, the welding slag generated by welding the two flows out through the overflow groove 11, so that the boss is prevented from being formed at the welding position of the top cover 200 and the battery case 100, the Pack grouping efficiency is improved, the production efficiency of the cylindrical lithium battery 10a is improved, the design space of the cylindrical lithium battery 10a is increased, the energy density of the Pack is further improved, and the usability of the cylindrical lithium battery 10a is better.
In one embodiment, referring to fig. 7, an avoidance bevel 212 is formed on an outer periphery of the abutting portion 210 away from the cover portion 220, and an avoidance channel 12 is formed between the avoidance bevel 212 and an inner wall of the accommodating groove 102. In the present embodiment, the outer periphery of the abutting portion 210 away from the cover portion 220 is formed with the avoidance bevel 212, and the avoidance channel 12 is formed between the avoidance bevel 212 and the inner wall of the accommodating groove 102, so that the abutting portion 210 is conveniently placed into the accommodating groove 102 through the avoidance bevel 212.
In one embodiment, referring to fig. 4, the abutting portion 210 and the capping portion 220 are integrally formed. Thus, the structural strength of the top cover 200 is high, and the production efficiency of the top cover 200 is improved.
In one embodiment, referring to fig. 3 and 4, the battery case 100 has a cylindrical shape, and the abutting portion 210 and the capping portion 220 have circular ring shapes. It can be appreciated that the accommodating groove 102 of the battery case 100 is used for accommodating the cylindrical winding core 20, because the battery case 100 is cylindrical, and for better adapting to the battery case 100, the abutting portion 210 and the cover portion 220 are both circular and annular.
Further, referring to fig. 7, the maximum diameter of the abutting portion 210 is equal to the diameter of the opening 101, and the maximum diameter of the cover portion 220 is larger than the diameter of the opening 101. In the present embodiment, in order to allow the abutting portion 210 to enter the accommodating groove 102, the maximum diameter of the abutting portion 210 is equal to the diameter of the opening 101, and the cap portion 220 is used to cap the opening 101, so the maximum diameter of the cap portion 220 is larger than the diameter of the opening 101.
In one embodiment, referring to fig. 4, the top cover 200 has an inverted truncated cone shape.
In one embodiment, the battery case is a steel case or an aluminum case.
In one embodiment, the top cover is a steel cover or an aluminum cover.
In one embodiment, referring to fig. 7, the cylindrical lithium battery core packaging mechanism 10 further includes a current collecting disc 300, a pole 400, and a lower plastic 500, the lower plastic 500 is connected to the abutting portion 210, the current collecting disc 300 is located between the core 20 and the lower plastic 500, two sides of the current collecting disc 300 are electrically connected to the core 20 and the pole 400 respectively, and the pole 400 sequentially penetrates through the lower plastic 500 and the top cover 200.
Referring to fig. 6, the present utility model further provides a cylindrical lithium battery 10a, which includes a winding core 20 and the winding core packaging mechanism 10 for a cylindrical lithium battery according to any of the foregoing embodiments, wherein the winding core 20 is accommodated in the accommodating groove 102.
Compared with the prior art, the utility model has at least the following advantages:
the joint of the abutting portion 210 and the sealing cover portion 220 is formed with the limiting ring groove 201, the peripheral wall of the limiting ring groove 201 and the peripheral wall of the opening 101 are welded, so that the sealing cover portion 220 is covered and connected with the battery case 100, and the sealing cover portion 220 is formed with the annular inclined edge 222 adjacent to the outer periphery of the limiting ring groove 201, and the overflow groove 11 is formed between the annular inclined edge 222 and the battery case 100, so that when the peripheral wall of the limiting ring groove 201 and the peripheral wall of the opening 101 are welded, welding slag generated by welding the two flows out through the overflow groove 11, a boss is prevented from being formed at the welding position of the top cover 200 and the battery case 100, the Pack efficiency is improved, the production efficiency of the cylindrical lithium battery 10a is improved, the design space of the cylindrical lithium battery 10a is increased, the energy density of the Pack is further improved, and the usability of the cylindrical lithium battery 10a is good.
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. The utility model provides a cylinder is core encapsulation mechanism for lithium cell which characterized in that includes:
the battery shell is provided with an opening and a containing groove which are communicated with each other, and the containing groove is used for containing the winding core;
the top cover comprises an abutting part and a sealing cover part which are mutually connected, the abutting part is positioned in the accommodating groove, a limiting ring groove is formed at the joint of the abutting part and the sealing cover part, the peripheral wall of the opening is welded with the peripheral wall of the limiting ring groove, so that the sealing cover part is covered and connected with the battery case, an annular bevel edge is formed on the outer periphery of the sealing cover part adjacent to the limiting ring groove, and an overflow groove is formed between the annular bevel edge and the battery case.
2. The cylindrical lithium battery core packaging mechanism according to claim 1, wherein an avoidance bevel is formed on the outer periphery of the abutting portion away from the cover portion, and an avoidance channel is formed between the avoidance bevel and the inner wall of the accommodating groove.
3. The winding core packaging mechanism for a cylindrical lithium battery according to claim 1, wherein the abutting portion and the cover portion are integrally formed.
4. The winding core packaging mechanism for a cylindrical lithium battery according to claim 1, wherein the battery case has a cylindrical shape, and the abutting portion and the cover portion each have a circular ring shape.
5. The winding core packaging mechanism for a cylindrical lithium battery according to claim 4, wherein a maximum diameter of the abutting portion is equal to a diameter of the opening, and a maximum diameter of the cover portion is larger than the diameter of the opening.
6. The cylindrical lithium battery core packaging mechanism according to claim 1, wherein the top cover is in a shape of an inverted truncated cone.
7. The winding core packaging mechanism for a cylindrical lithium battery according to claim 1, wherein the battery case is a steel case or an aluminum case.
8. The winding core packaging mechanism for a cylindrical lithium battery according to claim 1, wherein the top cover is a steel cover or an aluminum cover.
9. The cylindrical lithium battery winding core packaging mechanism according to claim 1, further comprising a current collecting disc, a pole and lower plastic, wherein the lower plastic is connected with the abutting portion, the current collecting disc is located between the winding core and the lower plastic, two sides of the current collecting disc are respectively electrically connected with the winding core and the pole, and the pole sequentially penetrates through the lower plastic and the top cover.
10. A cylindrical lithium battery, characterized by comprising a winding core and the winding core packaging mechanism for the cylindrical lithium battery according to any one of claims 1 to 9, wherein the winding core is accommodated in the accommodating groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322230464.9U CN220627982U (en) | 2023-08-18 | 2023-08-18 | Rolling core packaging mechanism for cylindrical lithium battery and cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322230464.9U CN220627982U (en) | 2023-08-18 | 2023-08-18 | Rolling core packaging mechanism for cylindrical lithium battery and cylindrical lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220627982U true CN220627982U (en) | 2024-03-19 |
Family
ID=90227038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322230464.9U Active CN220627982U (en) | 2023-08-18 | 2023-08-18 | Rolling core packaging mechanism for cylindrical lithium battery and cylindrical lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220627982U (en) |
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2023
- 2023-08-18 CN CN202322230464.9U patent/CN220627982U/en active Active
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