CN213483904U - Stable in structure's lithium cell apron structure down - Google Patents
Stable in structure's lithium cell apron structure down Download PDFInfo
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- CN213483904U CN213483904U CN202022812908.6U CN202022812908U CN213483904U CN 213483904 U CN213483904 U CN 213483904U CN 202022812908 U CN202022812908 U CN 202022812908U CN 213483904 U CN213483904 U CN 213483904U
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- 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
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Abstract
The utility model relates to the technical field of lithium batteries, in particular to a lower cover plate structure of a lithium battery with a stable structure, which comprises a lower cover plate, a connecting aluminum sheet, a separation ring and an explosion-proof sheet, wherein the middle part of the lower cover plate is provided with a stepped hole, and the stepped hole comprises a first hole section and a second hole section which are sequentially communicated from top to bottom; the isolation ring is positioned in the first hole section; the outer side edge of the explosion-proof sheet is bent to form a connecting wing, and the outer peripheral surface of the connecting wing is fixed on the inner peripheral surface of the second hole section through laser welding; the utility model discloses a fix explosion-proof piece direct laser welding on apron down to can prevent that explosion-proof piece from taking place to rock relatively down the apron, avoid explosion-proof piece because of rocking the emergence fracture, the below of connecting the wing simultaneously and lapping down does not have and shelters from, can realize carrying out laser welding between connecting the wing and lapping down after installing the cage again, be convenient for assemble, simultaneously under the condition of the lower apron of equal size, can leave bigger space, with the realization can install the explosion-proof aluminum sheet of great specification.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell technique and specifically relates to a stable in structure's apron structure under lithium cell.
Background
The lithium battery is a chemical battery with higher energy ratio and strong high and low temperature adaptability, basically comprises two categories of lithium metal batteries and lithium ions, is mainly characterized by high energy density, high working voltage, low self-discharge rate and no memory effect, is widely applied to the fields of notebooks, electric tools, electric automobiles and the like, and provides stable and safe power output for the batteries;
the lower cover plate structure of lithium cell mainly comprises aluminium apron, connection aluminum sheet, cage and explosion-proof aluminum sheet, and explosion-proof aluminum sheet generally adopts the riveting to fix on the aluminium apron at present, leads to explosion-proof aluminum sheet to take place to rock easily, and explosion-proof aluminum sheet breaks easily under the effect of rocking, and in case explosion-proof aluminum sheet breaks, then can't play the explosion-proof effect.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problem that explosion-proof aluminum sheets are generally riveted and fixed on an aluminum cover plate to cause the explosion-proof aluminum sheets to shake easily in the prior art, the lower cover plate structure of the lithium battery is stable in structure.
The utility model provides a technical scheme that its technical problem adopted is: a lithium battery lower cover plate structure with a stable structure comprises a lower cover plate, a connecting aluminum sheet, a separation ring and an explosion-proof sheet, wherein a stepped hole is formed in the middle of the lower cover plate and comprises a first hole section and a second hole section which are sequentially communicated from top to bottom, the diameter of the first hole section is smaller than that of the second hole section, and a first stepped surface is formed between the first hole section and the second hole section;
the isolating ring is positioned in the first hole section;
the outer side edge of the explosion-proof sheet is bent to form a connecting wing, the outer side of the upper surface of the connecting wing is in contact with the first step surface, the inner side of the upper surface of the connecting wing is in contact with the lower surface of the isolating ring, and the outer peripheral surface of the connecting wing is fixed on the inner peripheral surface of the second hole section through laser welding;
the connection aluminum sheet is arranged above the explosion-proof sheet, and the outer side of the lower surface of the connection aluminum sheet is in contact with the upper surface of the isolation ring.
Adopt in this scheme to fix explosion-proof piece direct laser welding on apron down, thereby can prevent that the relative apron of explosion-proof piece from taking place to rock down, avoid the explosion-proof piece because of rocking the emergence fracture, the below of connecting the wing and apron down does not have simultaneously shelters from, can realize carrying out laser welding between connecting the wing and the apron down after installing the cage again, be convenient for assemble, simultaneously under the condition of the lower apron of equal size, can reserve bigger space, with the realization can install the explosion-proof aluminum sheet of great specification.
Furthermore, the outer edge of the isolation ring extends upwards to form an upper extension part, the inner circumferential surface of the upper extension part is opposite to the outer circumferential surface of the connecting aluminum sheet, a bulge with an arc-shaped section is protruded inwards on the inner circumferential surface of the upper extension part, and the bulge is in contact with the outer circumferential surface of the connecting aluminum sheet; thereby improving the connection stability between the connecting aluminum sheet and the isolation ring.
Further, the inner side edge of the isolation ring extends downwards to form a lower extension part; thereby increasing the strength of the cage.
Furthermore, the central part of the connecting aluminum sheet is sunken downwards, the middle part of the explosion-proof sheet is protruded upwards, and the sunken part of the connecting aluminum sheet is contacted with the protruded part of the explosion-proof sheet upwards.
Further, the lower cover plate is an aluminum cover plate.
Further, the explosion-proof sheet is an explosion-proof aluminum sheet.
Further, a circle of welding seam is formed between the outer peripheral surface of the connecting wing and the inner peripheral surface of the second hole section; therefore, on one hand, the connection strength between the explosion-proof piece and the lower cover plate can be enhanced, and on the other hand, sealing can be formed between the connecting wing of the explosion-proof piece and the lower cover plate.
The utility model has the advantages that: the utility model discloses apron structure adopts under stable in structure's lithium cell to fix the direct laser welding of explosion-proof piece on apron down, thereby can prevent that the relative apron of explosion-proof piece from taking place to rock down, avoid the explosion-proof piece because of rocking the emergence fracture, the below of connecting the wing and apron down simultaneously does not have and shelters from, can realize carrying out laser welding between connecting the wing and the apron down after installing the cage again, be convenient for assemble, simultaneously under the condition of the lower apron of equal size, can reserve bigger space, with the realization can install the explosion-proof aluminum sheet of great specification.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic view of a shaking-proof lithium battery lower cover plate structure of the present invention;
FIG. 2 is a schematic view of a lower cover plate in the shaking-proof structure of the lower cover plate of the lithium battery of the present invention;
fig. 3 is the utility model discloses prevent that the schematic diagram of apron structural installation on the cylinder casing of lithium cell under the lithium cell that rocks.
In the figure: 1. the lower cover plate 11, the stepped hole 111, the first hole section 112, the second hole section 113 and the first stepped surface;
2. connecting an aluminum sheet;
3. spacer, 31, upper extension, 311, protrusion, 32, lower extension;
4. an explosion-proof sheet 41, a connecting wing;
5. a cylindrical housing.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-3, a lithium battery lower cover plate structure with a stable structure comprises a lower cover plate 1, a connecting aluminum sheet 2, a spacer 3 and an explosion-proof sheet 4, wherein a stepped hole 11 is formed in the middle of the lower cover plate 1, the stepped hole 11 comprises a first hole section 111 and a second hole section 112 which are sequentially communicated from top to bottom, the diameter of the first hole section 111 is smaller than that of the second hole section 112, and a first step surface 113 is formed between the first hole section 111 and the second hole section 112;
the cage 3 is located within the first bore section 111;
the outer edge of the explosion-proof sheet 4 is bent to form a connecting wing 41, the outer side of the upper surface of the connecting wing 41 is in contact with the first step surface 113, the inner side of the upper surface of the connecting wing 41 is in contact with the lower surface of the isolation ring 3, and the outer peripheral surface of the connecting wing 41 is fixed on the inner peripheral surface of the second hole section 112 by laser welding;
the connecting aluminum sheet 2 is arranged above the explosion-proof sheet 4, and the outer side of the lower surface of the connecting aluminum sheet 2 is in contact with the upper surface of the isolation ring 3.
The outer edge of the isolation ring 3 extends upwards to form an upper extension part 31, the inner circumferential surface of the upper extension part 31 is opposite to the outer circumferential surface of the connecting aluminum sheet 2, a bulge 311 with an arc-shaped section protrudes inwards from the inner circumferential surface of the upper extension part 31, and the bulge 311 is in contact with the outer circumferential surface of the connecting aluminum sheet 2; so that the connection stability between the connection aluminum sheet 2 and the cage 3 can be improved.
The inner side edge of the isolation ring 3 extends downwards to form a lower extension part 32; thereby increasing the strength of the cage 3.
The central part of the connecting aluminum sheet 2 is sunken downwards, the middle part of the explosion-proof sheet 4 is protruded upwards, and the sunken part of the connecting aluminum sheet 2 is contacted with the protruded part of the explosion-proof sheet 4 upwards.
The lower cover plate 1 is an aluminum cover plate.
The explosion-proof sheet 4 is an explosion-proof aluminum sheet.
A circle of welding seam is formed between the outer peripheral surface of the connecting wing 41 and the inner peripheral surface of the second hole section 112; so that the connection strength between the rupture disk 4 and the lower cover plate 1 can be enhanced on the one hand, and a seal can be formed between the connecting wing 41 of the rupture disk 4 and the lower cover plate 1 on the other hand.
The embodiment can be applied to cylindrical lithium batteries, and the lower cover plate 1 is plugged at the lower end of the cylindrical shell 5.
The difference between the present embodiment and the prior art is as follows:
adopt and fix explosion-proof piece 4 direct laser welding on apron 1 down, thereby can prevent that explosion-proof piece 4 from taking place to rock relatively apron 1 down, avoid explosion-proof piece 4 because of rocking the emergence fracture, connect wing 41 and apron 1's below simultaneously and do not shelter from down, can realize installing after 3 spacing rings again to connecting wing 41 and apron 1 down between laser welding, the equipment of being convenient for, simultaneously under the condition of apron 1 under the equal size, can reserve bigger space, in order to realize installing the explosion-proof aluminum sheet of great specification.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a structure is lapped under stable in structure's lithium cell, includes apron (1), connection aluminum sheet (2), cage (3) and explosion-proof piece (4) down, its characterized in that: the middle part of the lower cover plate (1) is provided with a stepped hole (11), the stepped hole (11) comprises a first hole section (111) and a second hole section (112) which are sequentially communicated from top to bottom, the diameter of the first hole section (111) is smaller than that of the second hole section (112), and a first stepped surface (113) is formed between the first hole section (111) and the second hole section (112);
the spacer ring (3) is positioned in the first hole section (111);
the outer edge of the explosion-proof sheet (4) is bent to form a connecting wing (41), the outer side of the upper surface of the connecting wing (41) is in contact with the first step surface (113), the inner side of the upper surface of the connecting wing (41) is in contact with the lower surface of the isolating ring (3), and the outer peripheral surface of the connecting wing (41) is fixed on the inner peripheral surface of the second hole section (112) through laser welding;
the connection aluminum sheet (2) is arranged above the explosion-proof sheet (4), and the outer side of the lower surface of the connection aluminum sheet (2) is in contact with the upper surface of the isolation ring (3).
2. The structurally stabilized lithium battery lower cover plate structure of claim 1, wherein: the outer edge of the isolation ring (3) extends upwards to form an upper extension part (31), the inner circumferential surface of the upper extension part (31) is opposite to the outer circumferential surface of the connecting aluminum sheet (2), a protrusion (311) with an arc-shaped section protrudes inwards on the inner circumferential surface of the upper extension part (31), and the protrusion (311) is in contact with the outer circumferential surface of the connecting aluminum sheet (2).
3. The structurally stabilized lithium battery lower cover plate structure of claim 1, wherein: the inner side edge of the isolation ring (3) extends downwards to form a lower extension part (32).
4. The structurally stabilized lithium battery lower cover plate structure of claim 1, wherein: the center part of connecting aluminum sheet (2) undercut, the middle part of explosion-proof piece (4) is upwards protruding, connect aluminum sheet (2) undercut position and explosion-proof piece (4) upwards convex position contact.
5. The structurally stabilized lithium battery lower cover plate structure of claim 1, wherein: the lower cover plate (1) is an aluminum cover plate.
6. The structurally stabilized lithium battery lower cover plate structure of claim 1, wherein: the explosion-proof sheet (4) is an explosion-proof aluminum sheet.
7. The structurally stabilized lithium battery lower cover plate structure of claim 1, wherein: a circle of welding seam is formed between the outer peripheral surface of the connecting wing (41) and the inner peripheral surface of the second hole section (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022812908.6U CN213483904U (en) | 2020-11-28 | 2020-11-28 | Stable in structure's lithium cell apron structure down |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022812908.6U CN213483904U (en) | 2020-11-28 | 2020-11-28 | Stable in structure's lithium cell apron structure down |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213483904U true CN213483904U (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022812908.6U Active CN213483904U (en) | 2020-11-28 | 2020-11-28 | Stable in structure's lithium cell apron structure down |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213483904U (en) |
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2020
- 2020-11-28 CN CN202022812908.6U patent/CN213483904U/en active Active
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