CN220628159U - Cylindrical battery with anode and cathode on same side tab - Google Patents
Cylindrical battery with anode and cathode on same side tab Download PDFInfo
- Publication number
- CN220628159U CN220628159U CN202322253822.8U CN202322253822U CN220628159U CN 220628159 U CN220628159 U CN 220628159U CN 202322253822 U CN202322253822 U CN 202322253822U CN 220628159 U CN220628159 U CN 220628159U
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- negative electrode
- positive
- current collecting
- collecting disc
- positive electrode
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- 238000004804 winding Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 10
- 210000005069 ears Anatomy 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 description 5
- 238000001764 infiltration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method 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
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction 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
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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a cylindrical battery with positive and negative electrode lugs on the same side, which comprises a shell, a winding core arranged in the shell and a cover plate covered on the opening side of the end part of the shell, wherein the cover plate is used for sealing the winding core into the shell; the positive electrode lug clusters and the negative electrode lug clusters are respectively and correspondingly provided with a positive electrode current collecting disc and a negative electrode current collecting disc, the positive electrode current collecting disc is connected with the inner wall of the shell, and the negative electrode current collecting disc is connected with a negative electrode column arranged on the cover plate through a conductive handle arranged on the positive electrode current collecting disc. The cylindrical battery with the same positive and negative electrode and the tab on the same side can effectively reduce the internal resistance of the shell, increase the high utilization rate of the battery and improve the energy density of the battery.
Description
Technical Field
The utility model belongs to the field of lithium ion battery processing, and particularly relates to a cylindrical battery with positive and negative electrodes and electrode lugs on the same side.
Background
At present, with the rapid development of new energy industry, the performances of the lithium ion battery such as energy density requirement, safety performance requirement, quick charge requirement and the like are further improved in society, and the large cylindrical battery is taken as a solution to be accepted, so that a wide market space is met. However, currently, large cylindrical batteries on the market are generally wound by means of continuous positive and negative lugs at two sides, and simultaneously, after welding the lugs and the current collecting disc at two ends of the positive and negative poles, the lugs and the current collecting disc are welded through the conductive handle, and finally, the large cylindrical batteries are connected with the shell through circumferential welding to achieve the purpose of sealing. However, the above cylindrical battery has many problems as follows:
(1) The positive electrode tab and the negative electrode tab are continuous tabs, and the closed end formed after the continuous tabs are flattened has a great negative influence on the subsequent electrolyte infiltration, so that the electrolyte infiltration speed is low and the complete infiltration time is overlong.
(2) The positive electrode and the negative electrode lugs extend out from different sides when being wound, are connected with the electrode column/the shell after being welded by the current collecting disc, the space utilization rate of the battery in the height direction can be reduced by the mode that the different sides are provided with the electrode lugs, the energy density is reduced, the internal resistance of the battery can be increased when the shell serves as a current conductor, and the energy conversion efficiency of the battery is reduced.
(3) Part of the tab batteries at the same side extend out of the conductive handles of the positive electrode and the negative electrode simultaneously after the tabs are welded with the current collecting disc, and the two conductive handles are welded with the cover plate respectively; meanwhile, the design of extending out two conductive handles is easy to cause interference during welding, and in the subsequent use process of the battery core, the battery is short-circuited due to the fact that the battery is in overlap joint due to false touch, so that safety risks are caused.
Disclosure of Invention
In view of the above, the present utility model is directed to a cylindrical battery with positive and negative electrode and tab on the same side, so as to solve at least one of the above problems.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a cylindrical battery with positive and negative poles and tabs on the same side, which comprises a shell, a winding core arranged in the shell and a cover plate covered on the opening side of the end part of the shell, wherein the cover plate is used for sealing the winding core into the shell;
a positive electrode lug cluster and a negative electrode lug cluster extend from one end face of the winding core, the positive electrode lug cluster and the negative electrode lug cluster encircle a central hole of the winding core and are symmetrically arranged, the positive electrode lug cluster and the negative electrode lug cluster are arranged in a cutting and stacking structure, and a gap is reserved between edge parts of the positive electrode lug cluster and the negative electrode lug cluster;
the positive electrode lug clusters and the negative electrode lug clusters are respectively and correspondingly provided with a positive electrode current collecting disc and a negative electrode current collecting disc, the positive electrode current collecting disc is connected with the inner wall of the shell, and the negative electrode current collecting disc is connected with a negative electrode column arranged on the cover plate through a conductive handle arranged on the positive electrode current collecting disc.
Further, the adjacent edge parts of the positive electrode lug clusters and the negative electrode lug clusters form an included angle of 60 degrees.
Further, the positive electrode lug clusters comprise a plurality of positive electrode lugs, the positive electrode lugs are arranged in a divergent array from the central position of the winding core to the edge position of the winding core, and the flattened positive electrode lug clusters are in a fan-shaped structure;
the negative electrode ear clusters comprise a plurality of negative electrode ears, the negative electrode ears are arranged in a divergent array from the central position of the winding core to the edge position of the winding core, and the beaten negative electrode ear clusters are in a fan-shaped structure.
Further, a gap is reserved between two adjacent lugs to form an electrolyte flowing space;
the gap width is 0.3-1.0 mm.
Further, the positive electrode current collecting disc and the negative electrode current collecting disc are both in fan-shaped structure, and are inwards sunken to form an inner concave part at the edge position close to the central hole of the winding core, the positive electrode current collecting disc is electrically connected with the positive electrode lug cluster, and the negative electrode current collecting disc is electrically connected with the negative electrode lug cluster.
Further, the positive electrode current collecting disc and the negative electrode current collecting disc are arranged at an included angle of 120 degrees.
Further, the positive electrode current collecting plate is outwards extended to form a protruding portion, and the protruding portion is connected with the inner wall of the shell through penetration welding.
Further, a containing groove for containing a conductive handle is formed in the negative electrode current collecting disc, one end of the conductive handle is connected with the negative electrode current collecting disc, and the other end of the conductive handle is connected with the negative electrode column.
Further, the end of the conductive handle is provided with a PI adhesive tape to insulate and wrap the end of the conductive handle.
Compared with the prior art, the cylindrical battery with the anode and cathode on the same side lug has the following structure
The beneficial effects are that:
according to the cylindrical battery with the positive electrode tab and the negative electrode tab on the same side, the positive electrode tab and the negative electrode tab are arranged on the same side of the battery, so that the space utilization rate of the winding core in the height direction is improved, and the energy density is improved; meanwhile, the positive electrode current collecting disc is connected with the shell through penetration welding, the negative electrode current collecting disc is led out of the conductive handle to be connected with the negative electrode column, and the safety of the design of only one conductive handle is greatly guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 is a schematic diagram of the overall structure of a cylindrical battery with positive and negative electrode tabs on the same side according to an embodiment of the utility model;
fig. 2 is a schematic diagram of the internal structure of a cylindrical battery with positive and negative electrode tabs on the same side according to an embodiment of the utility model;
fig. 3 is a schematic view of a structure of a positive and negative ear cluster in an untaped state according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of a flattened positive and negative ear cluster structure according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of an anode current collecting plate according to an embodiment of the utility model.
Reference numerals illustrate:
1. a housing; 2. a winding core; 3. a cover plate; 4. a positive tab cluster; 5. a negative ear cluster; 6. a positive electrode current collecting plate; 61. a boss; 7. a negative electrode current collecting plate; 71. a receiving groove; 72. a conductive handle; 73. PI adhesive tape.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 4, the present embodiment provides a cylindrical battery with positive and negative electrode tabs on the same side, which comprises a housing 1, a winding core 2 disposed in the housing 1, and a cover plate 3 covering an opening side of an end portion of the housing 1, wherein the cover plate 3 is used for sealing the winding core 2 into the housing 1;
a positive electrode lug cluster 4 and a negative electrode lug cluster 5 extend from one end face of the winding core 2, the positive electrode lug cluster 4 and the negative electrode lug cluster 5 encircle a central hole of the winding core 2 and are symmetrically arranged, the positive electrode lug cluster 4 and the negative electrode lug cluster 5 are arranged in a cutting and stacking structure, and a gap is reserved between edge positions of the positive electrode lug cluster 4 and the negative electrode lug cluster 5;
the positive electrode lug clusters 4 and the negative electrode lug clusters 5 are respectively and correspondingly provided with a positive electrode current collecting disc 6 and a negative electrode current collecting disc 7, the positive electrode current collecting disc 6 is connected with the inner wall of the shell 1, and the negative electrode current collecting disc 7 is connected with a negative electrode column arranged on the cover plate 3 through a conductive handle 72 arranged on the positive electrode current collecting disc.
Specifically, in this embodiment, the positive and negative electrode tab clusters 5 are formed by stacking the electrode tabs in a cutting manner, extend out from the same side and have a certain included angle distance, so that the positive electrode current collecting disc 6 and the negative electrode current collecting disc are prevented from being in overlap short circuit, the positive electrode current collecting disc 6 is welded on the aluminum shell through penetration welding, the negative electrode current collecting disc 7 is connected with the electrode post through the connecting handle, the space utilization rate of the winding core 2 in the height direction is improved, and the energy density is improved.
Further, the positive electrode lug and the negative electrode lug are positioned on the same side of the winding core 2, so that the space utilization rate of the winding core 2 in the height direction can be improved by more than 5% compared with the space utilization rate of the battery with the electrode lug at the different side.
According to the positive and negative electrode same-side tab cylindrical battery, the positive and negative electrode same-side tab of the battery is arranged, so that the space utilization rate of the winding core 2 in the height direction is improved, and the energy density is improved; meanwhile, the positive electrode current collecting disc 6 is connected with the shell 1 in a penetration welding way, the negative electrode current collecting disc 7 is led out of the conductive handle 72 to be connected with the negative electrode column, and only one conductive handle 72 is designed, so that the safety is greatly ensured, in addition, the current flowing path is short, and the internal resistance of the battery is effectively reduced.
In some embodiments, as shown in fig. 3 and 4, the adjacent edge portions of the positive electrode tab cluster 4 and the negative electrode tab cluster 5 form an angle of 60 °.
Specifically, in this embodiment, the positive tab clusters 4 and the negative tab clusters 5 are distributed in a ring shape, and the positions of the adjacent two edges are separated by 60 degrees, so that the problem of short circuit caused by too close distance can be avoided, and if the tab stretching angle management and control capability is weak, the tab stretching number can be properly reduced, and the angle of the included angle is reduced.
In some embodiments, as shown in fig. 3 and fig. 4, the positive tab cluster 4 includes a plurality of positive tabs, the plurality of positive tabs are arranged in a divergent array from the center position of the winding core 2 to the edge position of the winding core 2, and the flattened positive tab cluster 4 has a fan-shaped structure;
the negative electrode ear clusters 5 comprise a plurality of negative electrode ears, the negative electrode ears are arranged in a divergent array from the central position of the winding core 2 to the edge position of the winding core 2, and the flattened negative electrode ear clusters 5 are in a fan-shaped structure;
gaps are reserved between two adjacent lugs, and the width of the gaps is 0.3-1.0mm so as to form electrolyte flowing space.
Specifically, in this embodiment, through setting up positive and negative pole ear cluster 5 into the form of cutting the folding, a plurality of utmost point ears are divergent array arrangement from the core 2 central point to the core 2 border position, have certain width (0.3-1.0 mm) slit between utmost point ear and the utmost point ear for the utmost point ear is more fit when rubbing, is difficult for producing the utmost point ear fold, kneads the terminal surface after-planeness and just has the clearance and flows for the electrolyte, soaks the battery inner space, reduces annotates liquid infiltration time, promotes infiltration effect.
In some embodiments, as shown in fig. 1, 2 and 5, the positive current collecting disc 6 and the negative current collecting disc 7 are all in a fan-shaped structure, and are recessed inwards to form an inner concave part near the edge position of the central hole of the winding core 2, the positive current collecting disc 6 and the negative current collecting disc 7 are arranged at an included angle of 120 degrees, the positive current collecting disc 6 is electrically connected with the positive electrode lug cluster 4, and the negative current collecting disc 7 is electrically connected with the negative electrode lug cluster 5.
Specifically, the current collecting disc is designed at an angle of 120 degrees, the positive electrode current collecting disc 7 and the negative electrode current collecting disc 7 are correspondingly welded with the positive electrode lug and the negative electrode lug respectively, the effect of collecting current is achieved when the positive electrode lug and the negative electrode lug are welded conveniently, the positive electrode lug and the negative electrode lug are positioned on the same side of the winding core 2, the space utilization rate of the winding core 2 in the height direction can be improved, and compared with the space utilization rate of the battery with the opposite electrode lug in the height direction is improved by more than 5%.
In some embodiments, as shown in fig. 5, the positive electrode current collecting plate 6 is outwardly extended with a protrusion 61, the protrusion 61 is connected to the inner wall of the case 1 by a penetration welding, and the inner wall of the protrusion 61 is further provided with an inner groove for mounting the cap plate 3.
Specifically, the outer side of the positive electrode current collecting disc 6 adopts an everting mode to form a protruding part 61, and the protruding part protrudes a certain distance to be tightly attached to the shell wall, and is connected with the shell 1 through penetration welding, so that the current flowing distance is short, and the problem of internal resistance increase (more than 10% reduction) of the battery caused by the current flowing through all the shells 1 is effectively reduced.
In some embodiments, as shown in fig. 2, the anode current collecting plate 7 is provided with a receiving groove 71 for receiving the conductive handle 72, one end of the conductive handle 72 is connected to the anode current collecting plate 7, and the other end is connected to the anode column.
Specifically, in this embodiment, by providing a slot in the middle of the negative current collecting plate 7, a reserved space is conveniently provided when the conductive handle 72 is pressed down; the current collecting plate is connected with the negative pole column through the conductive handle 72, and the conductive handle 72 plays a role of fuse when current flows, and when the battery is abnormal due to high current, the conductive handle 72 can be fused to trigger a protection mechanism.
In some embodiments, as shown in fig. 2, the distal end of the conductive handle 72 is provided with PI tape 73 to insulate the distal end of the conductive handle 72.
Specifically, the conductive handle 72 is insulated and wrapped at the terminal end by a high-temperature PI tape 73, so that short circuit caused by direct contact with the positive current collecting disc 6 during bending is avoided.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (9)
1. The utility model provides a positive negative pole homonymy utmost point ear cylinder battery, includes casing (1), sets up core (2) in casing (1) and lid establish apron (3) at casing (1) tip open side, apron (3) are used for sealing core (2) to in casing (1), its characterized in that:
a positive electrode lug cluster (4) and a negative electrode lug cluster (5) extend from one end face of the winding core (2), the positive electrode lug cluster (4) and the negative electrode lug cluster (5) encircle a central hole of the winding core (2) and are symmetrically arranged, the positive electrode lug cluster (4) and the negative electrode lug cluster (5) are arranged in a cut-and-stack structure, and a gap is reserved between edge parts of the positive electrode lug cluster (4) and the negative electrode lug cluster (5);
the positive electrode lug clusters (4) and the negative electrode lug clusters (5) are respectively and correspondingly provided with a positive electrode current collecting disc (6) and a negative electrode current collecting disc (7), the positive electrode current collecting disc (6) is connected with the inner wall of the shell (1), and the negative electrode current collecting disc (7) is connected with a negative electrode column arranged on the cover plate (3) through a conductive handle (72) arranged on the positive electrode current collecting disc.
2. The positive and negative electrode same-side tab cylindrical battery according to claim 1, wherein:
the adjacent edge parts of the positive electrode lug cluster (4) and the negative electrode lug cluster (5) form an included angle of 60 degrees.
3. The positive and negative electrode same-side tab cylindrical battery according to claim 1, wherein:
the positive electrode lug clusters (4) comprise a plurality of positive electrode lugs, the positive electrode lugs are arranged in a divergent array from the central position of the winding core (2) to the edge position of the winding core (2), and the flattened positive electrode lug clusters (4) are in a fan-shaped structure;
the negative electrode ear clusters (5) comprise a plurality of negative electrode ears, the negative electrode ears are arranged in a divergent array from the central position of the winding core (2) to the edge position of the winding core (2), and the beaten negative electrode ear clusters (5) are in a fan-shaped structure.
4. The positive and negative electrode same-side tab cylindrical battery according to claim 3, wherein:
a gap is reserved between two adjacent lugs to form an electrolyte flowing space;
the gap width is 0.3-1.0 mm.
5. The positive and negative electrode same-side tab cylindrical battery according to claim 1, wherein:
the positive electrode current collecting disc (6) and the negative electrode current collecting disc (7) are in fan-shaped structure, and are inwards sunken to form an inner concave part at the edge position close to the central hole of the winding core (2), the positive electrode current collecting disc (6) is electrically connected with the positive electrode lug cluster (4), and the negative electrode current collecting disc (7) is electrically connected with the negative electrode lug cluster (5).
6. The positive and negative electrode same-side tab cylindrical battery according to claim 5, wherein:
the positive electrode current collecting disc (6) and the negative electrode current collecting disc (7) are arranged at an included angle of 120 degrees.
7. The positive and negative electrode same-side tab cylindrical battery according to claim 5, wherein:
the positive electrode current collecting disc (6) is outwards extended with a protruding part (61), and the protruding part (61) is connected with the inner wall of the shell (1) through penetration welding.
8. The positive and negative electrode same-side tab cylindrical battery according to claim 1, wherein:
the negative electrode current collecting disc (7) is provided with a containing groove (71) for containing the conductive handle (72), one end of the conductive handle (72) is connected with the negative electrode current collecting disc (7), and the other end of the conductive handle is connected with the negative electrode column.
9. The positive and negative electrode same-side tab cylindrical battery according to claim 8, wherein:
the end part of the conductive handle (72) is provided with a PI adhesive tape (73) so as to insulate and wrap the end of the conductive handle (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322253822.8U CN220628159U (en) | 2023-08-21 | 2023-08-21 | Cylindrical battery with anode and cathode on same side tab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322253822.8U CN220628159U (en) | 2023-08-21 | 2023-08-21 | Cylindrical battery with anode and cathode on same side tab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220628159U true CN220628159U (en) | 2024-03-19 |
Family
ID=90213293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322253822.8U Active CN220628159U (en) | 2023-08-21 | 2023-08-21 | Cylindrical battery with anode and cathode on same side tab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220628159U (en) |
-
2023
- 2023-08-21 CN CN202322253822.8U patent/CN220628159U/en active Active
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