CN221009019U - Multipolar ear cell and lithium battery - Google Patents
Multipolar ear cell and lithium battery Download PDFInfo
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- CN221009019U CN221009019U CN202322705759.7U CN202322705759U CN221009019U CN 221009019 U CN221009019 U CN 221009019U CN 202322705759 U CN202322705759 U CN 202322705759U CN 221009019 U CN221009019 U CN 221009019U
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- tab
- dummy
- battery cell
- cell body
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 17
- 210000005056 cell body Anatomy 0.000 claims abstract description 69
- 210000004027 cell Anatomy 0.000 claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 230000005405 multipole Effects 0.000 claims description 9
- 238000000926 separation method Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a multipolar ear cell, comprising: the battery cell body is wound; the battery cell body comprises a positive plate and a negative plate which are mutually overlapped and wound, a current collector of the positive plate extends to form a plurality of first dummy tabs, the first dummy tabs positioned on adjacent layers of the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, the first dummy tabs positioned on a spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other, a current collector of the negative plate extends to form a plurality of second dummy tabs, the second dummy tabs positioned on adjacent layers of the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, and the second dummy tabs positioned on the spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other; the battery cell body further comprises a first true tab connected with the first false tab and a second true tab connected with the second false tab. The multi-lug battery cell improves the energy density of the battery cell and reduces the risk of lithium separation by high-rate charging.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a multi-lug battery cell and a lithium battery.
Background
Lithium batteries are batteries containing lithium (including metallic lithium, lithium alloy, lithium ions, and lithium polymers) in electrochemical systems, and in recent years, lithium batteries have been widely used in fields such as digital products because of their long cycle life, good safety, and rapid charge and discharge.
The multi-tab winding core is one of the cell structures of a lithium battery, and contains a plurality of tabs. In the conventional multi-tab battery cell, due to the structural design problem, a plurality of tabs with the same polarity are all stacked together after the battery cell is wound and then welded. However, stacking all the tabs with the same polarity occupies a larger space, affects the thickness of the battery cell, and reduces the energy density of the battery cell; in addition, the charging efficiency of the tab with the structure can be kept below 85%, obvious resource waste exists, and meanwhile, the problem of lithium precipitation easily occurs when the tab is charged under a high current.
Disclosure of utility model
The utility model mainly aims to provide a multi-electrode lug battery cell, and aims to solve the technical problems of small battery cell capacity and low energy density caused by large stacking and laminating thickness of all electrode lugs with the same polarity of the battery cell at present.
To achieve the above object, the present utility model provides a multi-tab cell, including:
The battery cell body is wound;
The battery cell body comprises a positive plate and a negative plate which are mutually overlapped and wound, a current collector of the positive plate is extended to form a plurality of first dummy lugs, the first dummy lugs positioned on adjacent layers of the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, the first dummy lugs positioned on a spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other, a current collector of the negative plate is extended to form a plurality of second dummy lugs, the second dummy lugs positioned adjacent to the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, and the second dummy lugs positioned on the spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other;
The battery cell body further comprises a first true tab connected with the first false tab and a second true tab connected with the second false tab.
In some embodiments, the first real tab includes a first connection portion and a first contact portion connected to the first connection portion, the first contact portion being perpendicular to the first connection portion and parallel to the first dummy tab;
One end of the first connecting part is welded with one of the adjacent first dummy tabs, and the other end is welded with the other of the adjacent first dummy tabs.
In some embodiments, at least one end of the first connection portion is further provided with a first reinforcement portion for welding with the first dummy tab.
In some embodiments, the first reinforcing portion extends from at least one of two opposite sides of the first connecting portion along a length direction of the first dummy tab.
In some embodiments, the width of the first reinforcement is less than the width of the first dummy tab.
In some embodiments, the second real tab includes a second connection portion and a second contact portion connected to the second connection portion, the second contact portion being perpendicular to the second connection portion and parallel to the second dummy tab;
One end of the second connecting part is welded with one of the adjacent second dummy tabs, and the other end is welded with the other of the adjacent second dummy tabs.
In some embodiments, at least one end of the second connection portion is further provided with a second reinforcement portion for welding with the second dummy tab.
In some embodiments, the second reinforcing portion extends from at least one of two opposite sides of the second connecting portion along a length direction of the second dummy tab.
In some embodiments, the width of the second reinforcement is smaller than the width of the second dummy tab.
The utility model also provides a lithium battery, which comprises a shell and the multi-lug battery cell, wherein the multi-lug battery cell is encapsulated in the shell.
In the multipolar lug battery cell, a battery cell body is wound, the battery cell body comprises a positive plate and a negative plate which are mutually stacked and wound, a current collector of the positive plate is extended to form a plurality of first dummy lugs, the first dummy lugs positioned on adjacent layers of the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, and the first dummy lugs positioned on a spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other; the current collector of the negative plate extends to form a plurality of second dummy tabs, the adjacent second dummy tabs of the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, and the second dummy tabs of the spacer layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other. That is, a plurality of dummy tabs with the same polarity are not all stacked together, only the dummy tabs located on the spacing layer of the battery core body are overlapped and arranged in the thickness direction of the battery core body, and the dummy tabs with the same polarity located on the adjacent layer of the battery core body are staggered and arranged in the width direction of the battery core body and are not contacted with each other, and the thickness space is not stacked, so that the overall thickness of the tab structure part is reduced, the thickness of the tab structure part is thinned, the space occupied by stacking the multi-tab structure part is reduced, the energy density of the battery core is further improved, and the cycle performance of the battery core is improved; and the first false tab is connected with the first true tab, the second false tab is connected with the second true tab, namely, the true tab is connected between adjacent false tabs with the same polarity, under the condition of high-rate current, the high-rate current passes through the true tab to be shunted to the adjacent false tab, so that the current density is reduced, the lithium precipitation risk of high-rate charging is reduced, the charging efficiency can be increased, and the impedance is reduced.
Drawings
FIG. 1 is a schematic diagram of a multi-tab cell according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a multi-tab cell according to another embodiment of the present utility model;
FIG. 3 is a schematic diagram illustrating a structure of a connection between adjacent first dummy tabs and first dummy tabs according to an embodiment of the present utility model;
FIG. 4 is a schematic structural diagram illustrating connection between adjacent first dummy tabs and first dummy tabs according to another embodiment of the present utility model;
FIG. 5 is a schematic diagram illustrating a structure of a connection between adjacent first dummy tabs and first dummy tabs according to another embodiment of the present utility model;
FIG. 6 is a schematic diagram illustrating a connection between a second dummy tab and a second dummy tab according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram illustrating a connection between adjacent second dummy tabs and second dummy tabs according to another embodiment of the present utility model;
FIG. 8 is a schematic diagram illustrating a structure of a connection between an adjacent second dummy tab and a second dummy tab according to another embodiment of the present utility model;
reference numerals illustrate:
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made more clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or 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.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The present utility model proposes a multipolar ear cell, referring to fig. 1 and 2, comprising:
the battery cell body 100 is wound;
The battery cell body 100 comprises a positive plate and a negative plate which are mutually overlapped and wound, a current collector of the positive plate extends to form a plurality of first dummy tabs 111, the first dummy tabs 111 positioned at adjacent layers of the battery cell body 100 are staggered in the width direction of the battery cell body 100 and are not contacted with each other, the first dummy tabs 111 positioned at spacing layers of the battery cell body 100 are overlapped in the thickness direction of the battery cell body 100 and are connected with each other, a current collector of the negative plate extends to form a plurality of second dummy tabs 112, the second dummy tabs 112 positioned adjacent to the battery cell body 100 are staggered in the width direction of the battery cell body 100 and are not contacted with each other, and the second dummy tabs 112 positioned at spacing layers of the battery cell body 100 are overlapped in the thickness direction of the battery cell body 100 and are connected with each other;
The cell body further includes a first real tab 121 connected to the first dummy tab 111, and a second real tab 122 connected to the second dummy tab 112.
The multipolar ear cell according to this embodiment includes a cell body 100, the cell body 100 includes a positive electrode sheet and a negative electrode sheet, the positive electrode sheet and the negative electrode sheet are stacked on each other and are wound, and after winding, the cell body 100 is correspondingly provided with an adjacent layer and a spacer layer. The current collector of the positive plate is extended to be provided with a plurality of first dummy tabs 111, and the current collector of the negative plate is extended to be provided with a plurality of second dummy tabs 112. The positive electrode sheet and the negative electrode sheet stacked on each other in the battery core body 100 are in a flat state before winding, in the flat state, the battery core body 100 is in a strip shape, a plurality of first dummy tabs 111 and a plurality of second dummy tabs 112 are located at one side of the battery core body 100, and are sequentially arranged along the length direction of the battery core body 100, and the arrangement intervals of the plurality of first dummy tabs 111 and the plurality of second dummy tabs 112 are preset according to practical conditions, so that the battery core is not limited.
The first dummy tab 111 and the second dummy tab 112 are elongated, and may be referred to as being linear, etc., and the lengths of the first dummy tab 111 and the second dummy tab 112 are set according to actual situations. The first dummy tab 111 extends from the current collector of the positive electrode tab of the cell body 100, and optionally, the first dummy tab 111 is formed by laser die cutting the current collector of the positive electrode tab of the cell body 100. The second dummy tab 112 extends from the current collector of the negative electrode tab of the cell body 100, and optionally, the second dummy tab 112 is formed by laser die cutting the current collector of the negative electrode tab of the cell body 100.
The first dummy tabs 111 located at adjacent layers of the battery cell body 100 are staggered in the width direction of the battery cell body 100 and do not contact with each other, and the first dummy tabs 111 located at the spacing layers of the battery cell body 100 are overlapped in the thickness direction of the battery cell body 100; and the second dummy tabs 112 located at the adjacent layers of the cell body 100 are staggered in the width direction of the cell body 100 and do not contact with each other, and the second dummy tabs 112 located at the spacer layers of the cell body 100 are overlapped in the thickness direction of the cell body 100 and are connected with each other. That is, in this embodiment, a plurality of dummy tabs with the same polarity are not all stacked together, but only the dummy tabs located on the spacer layer of the battery core body 100 are overlapped and connected with each other in the thickness direction of the battery core body 100, while the dummy tabs with the same polarity located on the adjacent layers of the battery core body 100 are staggered and arranged in the width direction of the battery core body 100 and do not contact with each other, so that the thickness space is shared, and the stacking is avoided, thereby reducing the overall thickness of the tab structure part, thinning the thickness thereof, reducing the space occupied after stacking the multi-tab, further improving the energy density of the battery core, and improving the cycle performance of the battery core.
Further, the first dummy tab 111 is connected to a first real tab 121, and the second dummy tab 112 is connected to a second real tab 122. That is, a plurality of dummy tabs of the same polarity are connected to the real tab to conduct current through the real tab. The real lugs are connected with the false lugs during welding, so that the plasticity of the battery core is improved. As shown in fig. 3, for the first dummy tab 111 of the same polarity, the first real tab 121 is provided one and connected to the first dummy tab 111, and for the second dummy tab 112 of the same polarity, the second real tab 122 is provided one and connected to the second dummy tab 112. The shape of the first and second real tabs 121 and 122 may be a special shape, for example, the first and second real tabs 121 and 122 are inverted T-shaped, including but not limited to, and are set according to practical situations. Under the condition of high-rate current, the high-rate current passes through the true tab to be shunted to the adjacent false tab, so that the current density is reduced, the lithium precipitation risk of high-rate charging is reduced, the charging efficiency can be increased, and the impedance is reduced.
In some embodiments, referring to fig. 3, the first real tab 121 includes a first connection part 121a and a first contact part 121b connected to the first connection part 121a, the first contact part 121b being perpendicular to the first connection part 121a and parallel to the first dummy tab 111;
one end of the first connection part 121a is welded to one of the adjacent first dummy tabs 111, and the other end is welded to the other of the adjacent first dummy tabs 111.
The first real tab 121 is in an inverted T shape, the first contact portion 121b thereof is perpendicular to the first connection portion 121a, and opposite ends of the first connection portion 121a are respectively connected with adjacent first dummy tabs 111, which may be welded. When the first real tab 121 passes through the high-rate current, the current passes through the first contact portion 121b and then passes through the first connection portion 121a to be split to the adjacent first dummy tab 111. Alternatively, as shown in fig. 4, both ends of the first connection part 121a may be located at the same side of the adjacent first dummy tab 111 and respectively welded to the adjacent first dummy tab 111. Alternatively, the two ends of the first connection portion 121a may be respectively located at opposite sides of the adjacent first dummy tab 111, and may be respectively welded to the adjacent first dummy tab 111. Alternatively, the first real tab 121 is an integral tab, that is, the first connection portion 121a is integrally formed with the first contact portion 121 b.
In some embodiments, referring to fig. 4 and 5, at least one end of the first connection part 121a is further provided with a first reinforcement part 121c for welding with the first dummy tab 111.
The first reinforcement portion 121c may be integrally formed with the first connection portion 121a at an end of the first connection portion 121a, and the first reinforcement portion 121c may be welded to the first dummy tab 111. The first reinforcement portion 121c may be disposed at one of opposite ends of the first connection portion 121a, or the first reinforcement portion 121c may be disposed at opposite ends of the first connection portion 121 a. The first real tab 121 is welded to the first dummy tab 111 through the first reinforcing portion 121c, so that the connection area with the corresponding first dummy tab 111 can be increased, the connection between the first real tab 121 and the first dummy tab 111 is more stable, the overcurrent area is increased, and the overcurrent capacity is improved.
In some embodiments, referring to fig. 4 and 5, the first reinforcement part 121c extends from at least one of opposite sides of the first connection part 121a in the length direction of the first dummy tab 111.
Alternatively, referring to fig. 4, the first reinforcement part 121c extends from one of opposite sides of the first connection part 121a in the length direction of the first dummy tab 111; alternatively, referring to fig. 5, the first reinforcement parts 121c extend from opposite sides of the first connection part 121a in the length direction of the first dummy tab 111.
In some embodiments, referring to fig. 4 and 5, the width of the first reinforcement part 121c is smaller than the width of the first dummy tab 111. Therefore, the first reinforcing part 121c does not exceed the width space of the first dummy tab 111, so that the first reinforcing part 121c can be prevented from exceeding the arrangement to occupy the cell space, thereby not affecting the capacity of the cell and ensuring the energy density of the cell.
In some embodiments, referring to fig. 6, the second real tab 122 includes a second connection portion 122a and a second contact portion 122b connected to the second connection portion 122a, the second contact portion 122b being perpendicular to the second connection portion 122a and parallel to the second dummy tab 112;
One end of the second connection part 122a is welded to one of the adjacent second dummy tabs 112, and the other end is welded to the other of the adjacent second dummy tabs 112.
The second real tab 122 is in an inverted T shape, the second contact portion 122b is perpendicular to the second connection portion 122a, and opposite ends of the second connection portion 122a are respectively connected with the adjacent second dummy tab 112, and the connection manner may be welding. When the second real tab 122 passes through the high-rate current, the current passes through the second contact portion 122b and then passes through the second connection portion 122a to be split to the adjacent second dummy tab 112. Alternatively, as shown in fig. 4, two ends of the second connection portion 122a may be located at the same side of the adjacent second dummy tab 112 and welded to the adjacent second dummy tab 112 respectively. Alternatively, the two ends of the second connection portion 122a may be respectively located at opposite sides of the adjacent second dummy tab 112, and may be respectively welded to the adjacent second dummy tab 112. Alternatively, the second real tab 122 is an integral tab, that is, the second connection portion 122a and the second contact portion 122b are integrally formed.
In some embodiments, referring to fig. 7 and 8, at least one end of the second connection part 122a is further provided with a second reinforcement part 122c for welding with the second dummy tab 112.
The second reinforcement portion 122c may be integrally formed with the second connection portion 122a at an end of the second connection portion 122a, and the second reinforcement portion 122c is welded to the second dummy tab 112. The second reinforcement portion 122c may be disposed at one of opposite ends of the second connection portion 122a, or the second reinforcement portion 122c may be disposed at opposite ends of the second connection portion 122 a. The second real tab 122 is welded with the second dummy tab 112 through the second reinforcing portion 122c, so that the connection area with the corresponding second dummy tab 112 can be increased, the connection between the second real tab 122 and the second dummy tab 112 is more stable, the overcurrent area is increased, and the overcurrent capacity is improved.
In some embodiments, referring to fig. 7 and 8, the second reinforcement part 122c extends from at least one of opposite sides of the second connection part 122a along the length direction of the second dummy tab 112.
Alternatively, referring to fig. 7, the second reinforcement part 122c extends from one of opposite sides of the second connection part 122a in the length direction of the second dummy tab 112; alternatively, referring to fig. 8, the second reinforcement portion 122c extends from opposite sides of the second connection portion 122a along the length direction of the second dummy tab 112.
In some embodiments, referring to fig. 7 and 8, the width of the second reinforcement part 122c is smaller than the width of the second dummy tab 112. Therefore, the second reinforcing part 122c does not exceed the width space of the second dummy tab 112, so that the second reinforcing part 122c can be prevented from exceeding the arrangement to occupy the cell space, thereby not affecting the capacity of the cell and ensuring the energy density of the cell.
The utility model also provides a lithium battery, which comprises a shell and the multi-lug battery cell according to the embodiment, wherein the multi-lug battery cell is encapsulated in the shell. The specific structure of the multi-pole ear battery cell refers to the above embodiments, and because the lithium battery adopts all the technical solutions of all the embodiments, at least has all the technical effects brought by the technical solutions of the embodiments, and the details are not repeated here.
The above description of the preferred embodiments of the present utility model should not be taken as limiting the scope of the utility model, but rather should be understood to cover all modifications, variations and adaptations of the present utility model using its general principles and the following detailed description and the accompanying drawings, or the direct/indirect application of the present utility model to other relevant arts and technologies.
Claims (10)
1. A multi-tab cell, comprising:
The battery cell body is wound;
The battery cell body comprises a positive plate and a negative plate which are mutually overlapped and wound, a current collector of the positive plate is extended to form a plurality of first dummy lugs, the first dummy lugs positioned on adjacent layers of the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, the first dummy lugs positioned on a spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other, a current collector of the negative plate is extended to form a plurality of second dummy lugs, the second dummy lugs positioned adjacent to the battery cell body are staggered in the width direction of the battery cell body and are not contacted with each other, and the second dummy lugs positioned on the spacing layer of the battery cell body are overlapped in the thickness direction of the battery cell body and are connected with each other;
The battery cell body further comprises a first true tab connected with the first false tab and a second true tab connected with the second false tab.
2. The multi-pole cell of claim 1, wherein,
The first real tab comprises a first connecting part and a first contact part connected with the first connecting part, and the first contact part is perpendicular to the first connecting part and parallel to the first dummy tab;
One end of the first connecting part is welded with one of the adjacent first dummy tabs, and the other end is welded with the other of the adjacent first dummy tabs.
3. The multi-pole cell of claim 2, wherein,
At least one end of the first connecting part is also provided with a first reinforcing part used for being welded with the first dummy tab.
4. The multi-pole cell of claim 3, wherein,
The first reinforcing part extends from at least one of two opposite sides of the first connecting part along the length direction of the first dummy tab.
5. The multi-pole cell of claim 4, wherein,
The width of the first reinforcing part is smaller than that of the first dummy tab.
6. The multi-pole cell of claim 1, wherein,
The second true tab comprises a second connecting part and a second contact part connected with the second connecting part, and the second contact part is perpendicular to the second connecting part and parallel to the second false tab;
One end of the second connecting part is welded with one of the adjacent second dummy tabs, and the other end is welded with the other of the adjacent second dummy tabs.
7. The multi-pole cell of claim 6, wherein,
At least one end of the second connecting part is also provided with a second reinforcing part used for being welded with the second dummy tab.
8. The multi-pole cell of claim 7, wherein,
The second reinforcing part extends from at least one of two opposite sides of the second connecting part along the length direction of the second dummy tab.
9. The multi-pole cell of claim 8, wherein,
The width of the second reinforcing part is smaller than that of the second dummy tab.
10. A lithium battery comprising a housing and the multi-tab cell of any one of claims 1-9, the multi-tab cell being encapsulated in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322705759.7U CN221009019U (en) | 2023-10-09 | 2023-10-09 | Multipolar ear cell and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322705759.7U CN221009019U (en) | 2023-10-09 | 2023-10-09 | Multipolar ear cell and lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221009019U true CN221009019U (en) | 2024-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322705759.7U Active CN221009019U (en) | 2023-10-09 | 2023-10-09 | Multipolar ear cell and lithium battery |
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| Country | Link |
|---|---|
| CN (1) | CN221009019U (en) |
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2023
- 2023-10-09 CN CN202322705759.7U patent/CN221009019U/en active Active
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