CN216928681U - Lithium battery and lithium battery stop mechanism - Google Patents
Lithium battery and lithium battery stop mechanism Download PDFInfo
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- CN216928681U CN216928681U CN202220035984.7U CN202220035984U CN216928681U CN 216928681 U CN216928681 U CN 216928681U CN 202220035984 U CN202220035984 U CN 202220035984U CN 216928681 U CN216928681 U CN 216928681U
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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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- 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
Abstract
The utility model provides a lithium battery and a lithium battery stop mechanism, wherein the lithium battery comprises: the device comprises a shell, a winding core, a stop frame, a cover plate, an anode connecting sheet and a cathode connecting sheet, wherein the winding core is provided with an anode lug and a cathode lug; the winding core is arranged in the shell, the stopping frame and the cover plate are both arranged on the shell, and the winding core, the stopping frame and the cover plate are sequentially distributed from bottom to top; the positive connecting piece and the negative connecting piece are arranged between the cover plate and the stopping frame and are electrically connected with the cover plate, the upper end of the positive lug is fixedly connected with the positive connecting piece, and the upper end of the negative lug is fixedly connected with the negative connecting piece; the stopping frame is provided with a first groove and a second groove, the first groove is formed in the lower side of the stopping frame and located on the upper side of the lower end of the positive electrode lug, and the second groove is formed in the lower side of the stopping frame and located on the upper side of the lower end of the negative electrode lug. According to the utility model, the risk of inward folding of the lugs in the battery core is reduced, and the safety of the battery is improved.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a lithium battery and a lithium battery stop mechanism.
Background
The new energy automobile is developed, and low carbon and emission reduction are facilitated. The lithium battery is a key part of the new energy automobile. The lithium battery with the square aluminum shell usually adopts a butterfly welding structure, and at present, the lithium battery has the risk of tab inward folding short circuit, so that the internal safety of the battery is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lithium battery and a lithium battery locking mechanism, which reduce the risk of inward folding of a lug in a battery cell and improve the safety of the battery.
The above object of the present invention can be achieved by the following technical solutions:
the present invention provides a lithium battery including: the device comprises a shell, a winding core, a stop frame, a cover plate, a positive electrode connecting piece and a negative electrode connecting piece, wherein the winding core is provided with a positive electrode lug and a negative electrode lug; the winding core is arranged in the shell, the stopping frame and the cover plate are both arranged on the shell, and the winding core, the stopping frame and the cover plate are sequentially distributed from bottom to top;
the positive connecting piece and the negative connecting piece are arranged between the cover plate and the stopping frame and are electrically connected with the cover plate, the upper end of the positive lug is fixedly connected with the positive connecting piece, and the upper end of the negative lug is fixedly connected with the negative connecting piece;
the stopping frame is provided with a first groove and a second groove, the first groove is arranged on the lower side of the stopping frame and located on the upper side of the lower end of the positive lug, and the second groove is arranged on the lower side of the stopping frame and located on the upper side of the lower end of the negative lug.
In a preferred embodiment, the positive tab has a positive bent portion and a positive connecting portion, the positive bent portion is disposed outside the stopper frame, and the positive connecting portion is fixed to the positive connecting piece; the negative electrode lug is provided with a negative electrode bending part and a negative electrode connecting part, the negative electrode bending part is arranged on the outer side of the stopping frame, and the negative electrode connecting part is fixedly connected with the negative electrode connecting piece.
In a preferred embodiment, a positive electrode recess is provided on a lower side of the positive electrode connecting piece, and the positive electrode tab is fixed to the positive electrode recess.
In a preferred embodiment, a negative electrode recess is provided on a lower side of the negative electrode connecting piece, and the negative electrode tab is fixed to the negative electrode recess.
In a preferred embodiment, a positive electrode protection sheet is fixed to the lower side of the positive electrode connecting sheet, and the positive electrode tab is arranged between the positive electrode connecting sheet and the positive electrode protection sheet; the downside rigid coupling of negative pole connection piece has the negative pole screening glass, the negative pole ear set up in the negative pole connection piece with between the negative pole screening glass.
In a preferred embodiment, a plurality of positive protrusions and a plurality of negative protrusions are arranged on the upper side of the stop frame, the positive protection sheet abuts against the positive protrusions, and the negative protection sheet abuts against the negative protrusions.
In a preferred embodiment, the positive connection piece and the negative connection piece are both laser-welded to the cover plate; the positive lug is ultrasonically welded to the positive connecting sheet, and the negative lug is ultrasonically welded to the negative connecting sheet.
In a preferred embodiment, the depth of the first groove is 1mm to 4mm, and the depth of the second groove is 1mm to 4 mm.
In a preferred embodiment, a buckle is arranged on the lower side of the cover plate, and the stop frame is provided with a buckle hole in which the buckle is buckled.
The utility model provides a lithium battery stopping mechanism, comprising: the device comprises a stopping frame, a cover plate, a positive connecting piece and a negative connecting piece, wherein the positive connecting piece and the negative connecting piece are arranged between the cover plate and the stopping frame and are electrically connected with the cover plate;
the stop frame is provided with a first groove and a second groove, and the first groove and the second groove are arranged on the lower side of the stop frame.
The utility model has the characteristics and advantages that:
in this lithium cell, the stop frame is located the top of rolling up the core, and the anodal ear on rolling up the core is connected with the anodal connection piece that is located the stop frame top, and the negative pole ear on rolling up the core is connected with the negative pole connection piece that is located the stop frame top, and first recess has reserved the space that warp for the anodal ear that is located the stop frame below, and the second recess has reserved the space that warp for the negative pole ear that is located the stop frame below, has avoided positive ear and negative pole ear infolding short circuit.
The lithium battery increases the deformation space of the positive electrode lug and the negative electrode lug under the condition of not influencing the battery performance and battery assembly and welding, reduces the risk of inward folding of the electrode lug inside the battery cell, improves the safety of the battery, improves the production qualified rate, and has the advantages of convenience in operation and simple structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a lithium battery provided by the utility model after a winding core is combined;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3-5 are exploded views of lithium batteries provided by the present invention;
fig. 6-9 are schematic structural views of a stopper frame in a lithium battery provided by the present invention;
fig. 10-12 are schematic structural diagrams of a positive electrode connecting sheet in a lithium battery provided by the utility model;
fig. 13-15 are schematic structural views of a lithium battery provided by the present invention after welding tabs;
Fig. 16-17 are schematic structural views of a lithium battery provided by the present invention after a stopper frame is mounted;
fig. 18 is a schematic structural diagram of a cover plate in a lithium battery provided by the present invention.
The reference numbers illustrate:
10. a housing; 11. an insulating bag;
20. a winding core;
30. a positive tab; 31. a positive electrode bent portion; 32. a positive electrode connecting part;
40. a negative tab; 41. a negative electrode bent portion; 42. a negative electrode connecting part;
50. a cover plate; 51. buckling;
60. a stopper frame; 61. a first groove; 62. a second groove; 63. a snap-in hole; 641. a positive electrode projection; 642. a negative electrode projection;
70. a positive electrode connecting sheet; 701. a positive electrode recess; 71. a positive electrode protective sheet;
80. a negative electrode connecting sheet; 801. a negative electrode recess; 81. and a negative electrode protection sheet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Scheme one
The present invention provides a lithium battery, as shown in fig. 1 to 7, including: the winding structure comprises a shell 10, a winding core 20, a stop frame 60, a cover plate 50, a positive connecting piece 70 and a negative connecting piece 80, wherein the winding core 20 is provided with a positive lug 30 and a negative lug 40; the winding core 20 is arranged in the shell 10, the stopping frame 60 and the cover plate 50 are both arranged on the shell 10, and the winding core 20, the stopping frame 60 and the cover plate 50 are sequentially distributed from bottom to top; the positive connecting piece 70 and the negative connecting piece 80 are arranged between the cover plate 50 and the stop frame 60 and are electrically connected with the cover plate 50, the upper end of the positive lug 30 is fixedly connected with the positive connecting piece 70, and the upper end of the negative lug 40 is fixedly connected with the negative connecting piece 80; the stopper frame 60 is provided with a first groove 61 and a second groove 62, the first groove 61 is provided on the lower side of the stopper frame 60 and located on the upper side of the lower end of the positive electrode tab 30, and the second groove 62 is provided on the lower side of the stopper frame 60 and located on the upper side of the lower end of the negative electrode tab 40.
In the lithium battery, the stop frame 60 is positioned above the winding core 20, the positive tab 30 on the winding core 20 is connected with the positive connecting piece 70 positioned above the stop frame 60, the negative tab 40 on the winding core 20 is connected with the negative connecting piece 80 positioned above the stop frame 60, the first groove 61 reserves a deformation space for the positive tab 30 positioned below the stop frame 60, the second groove 62 reserves a deformation space for the negative tab 40 positioned below the stop frame 60, and the short circuit caused by inward folding of the positive tab 30 and the negative tab 40 is avoided.
The lithium battery increases the deformation space of the positive electrode lug 30 and the negative electrode lug 40 under the condition of not influencing the battery performance and the battery assembly and welding, reduces the risk of inward folding of the lugs in the battery core, improves the safety of the battery, improves the production qualification rate, and has the advantages of convenience in operation and simple structure.
In one embodiment, the positive tab 30 has a positive bent portion 31 and a positive connecting portion 32, and as shown in fig. 1 and 2, the positive bent portion 31 is disposed outside the stopper bracket 60, and the positive connecting portion 32 is fixed to the positive connecting piece 70; the negative electrode tab 40 has a negative electrode bent portion 41 and a negative electrode connecting portion 42, the negative electrode bent portion 41 is disposed outside the stopper frame 60, and the negative electrode connecting portion 42 is fixed to the negative electrode connecting piece 80. As shown in fig. 1, 2, and 13-17, the stopping frame 60 is pressed down on the housing 10, so that the positive tab 30 and the negative tab 40 are respectively bent outward, the positive bent portion 31 is located outside the stopping frame 60, and the negative bent portion 41 is located outside the stopping frame 60.
Further, the depth of the first groove 61 is 1mm to 4mm, for example, the depth of the first groove 61 may be 2mm or 3 mm; the depth of the second groove 62 is 1mm to 4mm, for example, the depth of the second groove 62 may be 2mm or 3 mm.
As shown in fig. 6-9, 13 and 18, a buckle 51 is provided on the lower side of the cover plate 50, and a buckle hole 63 is provided on the latch bracket 60, and the buckle 51 is buckled in the buckle hole 63, so that the latch bracket 60 is matched with the buckle 51 of the cover plate 50. The stop bracket 60 engages the positive tab 30 and the negative tab 40 to ensure that the positive tab 30 and the negative tab 40 are spread apart.
In one embodiment, the positive electrode tab 70 is provided with a positive electrode recess 701 on the lower side, and as shown in fig. 10-12, the positive electrode tab 30 is fixed to the positive electrode recess 701, so that the bending space of the internal positive electrode tab 30 is increased, and the inward bending risk is reduced. The positive electrode tab 70 is bent to form the positive electrode recess 701. Further, a positive electrode protection sheet 71 is fixed to the lower side of the positive electrode tab 70, and the positive electrode tab 30 is disposed between the positive electrode tab 70 and the positive electrode protection sheet 71. Preferably, the positive tab 30 and the positive tab 70 are ultrasonically welded together.
In one embodiment, the negative electrode connecting piece 80 is provided with a negative electrode recess 801 at the lower side thereof, and the negative electrode tab 40 is fixedly connected to the negative electrode recess 801, so that the bending space of the inner negative electrode tab 40 is increased, and the inward bending risk is reduced. The negative electrode connecting piece 80 is bent to form the negative electrode recess 801. Further, a negative electrode protection sheet 81 is fixed to the lower side of the negative electrode connecting sheet 80, and the negative electrode tab 40 is provided between the negative electrode connecting sheet 80 and the negative electrode protection sheet 81. Preferably, the negative electrode tab 40 and the negative electrode connecting piece 80 are ultrasonically welded together.
In one embodiment, the positive tab 30 is ultrasonically welded to the positive tab 70 and the negative tab 40 is ultrasonically welded to the negative tab 80.
As shown in fig. 7 and 8, the upper side of the stopper bracket 60 is provided with a plurality of positive protrusions 641 and a plurality of negative protrusions 642, which are distributed at intervals, and the positive protrusions 641 and the negative protrusions 642 function as ribs, thereby improving the strength of the stopper bracket 60 and preventing deformation and warpage.
In one embodiment, the positive connection tab 70 and the negative connection tab 80 are both laser welded to the cover plate 50. Specifically, the cover plate 50 is provided with a cover plate positive electrode and a cover plate negative electrode, the positive electrode connecting piece 70 is laser-welded with the cover plate positive electrode, and the negative electrode connecting piece 80 is laser-welded with the cover plate negative electrode.
The housing 10 may be a square aluminum case, and an insulating bag 11 is provided in the housing 10. In one embodiment, the lithium battery includes two jelly rolls 20, and the two jelly rolls 20 are arranged side by side. The lithium battery can be a power lithium battery and can be applied to new energy automobiles.
The assembling steps of the lithium battery comprise: (1) the positive connecting piece 70 is laser welded with the positive electrode of the cover plate, and the negative connecting piece 80 is laser welded with the negative electrode of the cover plate; (2) as shown in fig. 13-15, the positive tab 30 is ultrasonically welded to the positive connection tab 70, and the negative tab 40 is ultrasonically welded to the negative connection tab 80; (3) as shown in fig. 16-17, the stop frame 60 is used to fasten the positive tab 30 and the negative tab 40, so as to ensure that the positive tab 30 and the negative tab 40 are spread apart; (4) the winding core 20 is mounted in the can 10 and the stop bracket 60 and the cover plate 50 are mounted to the can 10. According to the lithium battery, under the conditions that the performance of the battery is not influenced, the assembly and welding of the battery are not influenced, the positive electrode lug 30 and the negative electrode lug 40 are effectively propped open, the space of the bending position of the internal electrode lug is increased, the risk of inward bending of the internal electrode lug of the battery core is reduced, the safety of the battery is improved, the production yield and the internal welding manufacturing yield of the battery core are improved, and the lithium battery is convenient to operate and simple in structure.
Scheme two
The present invention provides a lithium battery stopping mechanism, as shown in fig. 1 and 2, comprising: the structure comprises a stop frame 60, a cover plate 50, a positive connecting piece 70 and a negative connecting piece 80, wherein the positive connecting piece 70 and the negative connecting piece 80 are arranged between the cover plate 50 and the stop frame 60 and are electrically connected with the cover plate 50; the stopper frame 60 is provided with a first groove 61 and a second groove 62, and the first groove 61 and the second groove 62 are provided on the lower side of the stopper frame 60. The lithium battery stopping mechanism can effectively support the positive electrode lug 30 and the negative electrode lug 40 without influencing the performance of the battery and the assembly and welding of the battery, increases the deformation space of the positive electrode lug 30 and the negative electrode lug 40, reduces the risk of folding the electrode lug inside the battery cell, improves the safety of the battery, improves the production qualified rate, and has the advantages of convenience in operation and simple structure.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention based on the disclosure of the application document.
Claims (10)
1. A lithium battery, comprising: the device comprises a shell, a winding core, a stop frame, a cover plate, a positive connecting sheet and a negative connecting sheet, wherein the winding core is provided with a positive lug and a negative lug; the winding core is arranged in the shell, the stopping frame and the cover plate are both arranged on the shell, and the winding core, the stopping frame and the cover plate are sequentially distributed from bottom to top;
The positive connecting piece and the negative connecting piece are arranged between the cover plate and the stopping frame and are electrically connected with the cover plate, the upper end of the positive lug is fixedly connected with the positive connecting piece, and the upper end of the negative lug is fixedly connected with the negative connecting piece;
the stopping frame is provided with a first groove and a second groove, the first groove is arranged on the lower side of the stopping frame and located on the upper side of the lower end of the positive lug, and the second groove is arranged on the lower side of the stopping frame and located on the upper side of the lower end of the negative lug.
2. The lithium battery of claim 1, wherein the positive tab has a positive bent portion and a positive connecting portion, the positive bent portion is disposed outside the stopper frame, and the positive connecting portion is fixedly connected to the positive connecting tab;
the negative electrode lug is provided with a negative electrode bending part and a negative electrode connecting part, the negative electrode bending part is arranged on the outer side of the stopping frame, and the negative electrode connecting part is fixedly connected with the negative electrode connecting piece.
3. The lithium battery as claimed in claim 1 or 2, wherein a cathode recess is provided on a lower side of the cathode connecting sheet, and the cathode tab is fixedly connected to the cathode recess.
4. The lithium battery of claim 1 or 2, wherein the negative electrode tab has a negative electrode recess on an underside thereof, and the negative electrode tab is secured to the negative electrode recess.
5. The lithium battery according to claim 1, wherein a positive electrode protection sheet is fixedly connected to the lower side of the positive electrode connecting sheet, and the positive electrode tab is arranged between the positive electrode connecting sheet and the positive electrode protection sheet;
the downside rigid coupling of negative pole connection piece has the negative pole screening glass, the negative pole ear set up in the negative pole connection piece with between the negative pole screening glass.
6. The lithium battery of claim 5, wherein the stopper frame is provided with a plurality of positive protrusions and a plurality of negative protrusions, the positive protrusions are spaced apart from each other, the positive protection sheet abuts against the positive protrusions, and the negative protection sheet abuts against the negative protrusions.
7. The lithium battery of claim 5, wherein the positive connection tab and the negative connection tab are both laser welded to the cover plate; the positive lug is ultrasonically welded to the positive connecting sheet, and the negative lug is ultrasonically welded to the negative connecting sheet.
8. The lithium battery of claim 1, wherein the first groove has a depth of 1mm to 4mm, and the second groove has a depth of 1mm to 4 mm.
9. The lithium battery of claim 1, wherein the cover plate has a snap on an underside thereof, and the stopper frame has a snap hole in which the snap is snapped.
10. A lithium battery stopper mechanism, comprising: the device comprises a stopping frame, a cover plate, a positive connecting piece and a negative connecting piece, wherein the positive connecting piece and the negative connecting piece are arranged between the cover plate and the stopping frame and are electrically connected with the cover plate;
the stop frame is provided with a first groove and a second groove, and the first groove and the second groove are arranged on the lower side of the stop frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220035984.7U CN216928681U (en) | 2022-01-07 | 2022-01-07 | Lithium battery and lithium battery stop mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220035984.7U CN216928681U (en) | 2022-01-07 | 2022-01-07 | Lithium battery and lithium battery stop mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN216928681U true CN216928681U (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220035984.7U Active CN216928681U (en) | 2022-01-07 | 2022-01-07 | Lithium battery and lithium battery stop mechanism |
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| CN (1) | CN216928681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213500A (en) * | 2023-05-09 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | Tab shaping device, tab shaping method and battery production device |
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2022
- 2022-01-07 CN CN202220035984.7U patent/CN216928681U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213500A (en) * | 2023-05-09 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | Tab shaping device, tab shaping method and battery production device |
| CN116213500B (en) * | 2023-05-09 | 2023-08-04 | 宁德时代新能源科技股份有限公司 | Tab shaping device, tab shaping method and battery production device |
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