CN219716896U - Collector external lug composite assembly - Google Patents
Collector external lug composite assembly Download PDFInfo
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- CN219716896U CN219716896U CN202321339738.1U CN202321339738U CN219716896U CN 219716896 U CN219716896 U CN 219716896U CN 202321339738 U CN202321339738 U CN 202321339738U CN 219716896 U CN219716896 U CN 219716896U
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- tab
- collector
- connector
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- 239000002131 composite material Substances 0.000 title claims abstract description 62
- 150000001875 compounds Chemical class 0.000 claims description 8
- 210000005069 ears Anatomy 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 238000007747 plating Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to an external-collector lug composite assembly, which belongs to the technical field of batteries and comprises a composite current collector and a current collector connecting piece, wherein a plurality of lugs are arranged on one side of the composite current collector at intervals, the front sides and the back sides of the lugs are connected with the current collector connecting piece in a staggered manner, and the current collector connecting piece is connected with an external lug, so that the purpose of effectively connecting metal plating layers on two sides of the composite current collector is achieved, the energy density of an electric core is improved, and the packaging difficulty of the lugs is reduced.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a collector outer tab composite assembly.
Background
In recent years, lithium ion batteries have been widely focused on high safety and high specific energy, and a composite current collector is a composite unit with a metal coating and a polymer multilayer structure, the surface density of the composite current collector is far lower than that of a current metal foil current collector for the lithium ion batteries, the quality energy density of a battery core can be greatly improved, and meanwhile, a polymer layer in an inner layer of the composite current collector can rapidly cut off the current of a puncture part before thermal runaway caused by abuse such as needling occurs, so that the safety performance of the battery core is greatly improved. Generally, the structure of the composite current collector is a three-layer structure of sputtering/vapor plating metal coating on two sides of a polymer layer, and the polymer layer has no electronic conduction capability, which leads to that when the electrode lugs of the battery core are welded, the metal coating on two sides of the polymer layer are required to be linked through a special welding machine or a connecting sheet, so that the electrode lugs on one side only are welded to realize the electronic conduction on two sides of the electrode plate.
At present, the connection between the composite current collector and the tab adopts two layers of metal tabs to clamp one side of one layer of composite current collector, and then the multiple layers of metal tabs are welded with the positive electrode tab or the negative electrode tab of the lithium battery respectively, so that the connection between the composite current collector and the tab is realized. But such connection structure not only can increase battery weight, can also increase the thickness of utmost point ear department, can also increase utmost point ear length simultaneously and cause electric core volume increase, reduce electric core volume energy density and quality energy density, influence the encapsulation of electric core simultaneously.
Therefore, a person skilled in the art provides a current collector external tab composite assembly to solve the above-mentioned problems in the prior art.
Disclosure of Invention
The utility model provides a composite assembly of a collector body external lug, which aims to effectively connect metal plating layers at two sides of a composite collector body, improve the energy density of a battery cell and reduce the packaging difficulty at the lug.
The technical scheme for solving the technical problems is as follows: the utility model provides a compound collector external tab compound subassembly, includes compound collector and collector connecting piece, one side interval of compound collector is provided with a plurality of tabs, and a plurality of the positive and negative looks of tab are misplaced and are connected with collector connecting piece, collector connecting piece is connected with external tab.
The beneficial effects of the utility model are as follows:
1. the current collector external electrode lug composite assembly is connected with the external electrode lug connecting piece through the current collector connecting piece, so that the thickness and the weight of a battery at the electrode lug are reduced, the energy density of a battery core is improved, and the packaging difficulty at the electrode lug is reduced;
2. the staff can comprehensively judge the specific combination mode of the external tab composite component of the current collector according to the overall mass energy density, the volume energy density and the multiplying power performance of the battery core, and the practicability of the device is improved.
On the basis of the technical scheme, the utility model can be improved as follows.
Further, a first lug and a second lug are arranged at intervals on one side of the composite current collector to form a binary lug composite current collector, and the first lug, the second lug and the third lug are arranged at intervals on one side of the composite current collector in sequence to form a ternary lug composite current collector.
Further, the current collector connecting piece is a first-order tab connecting piece or a second-order tab connecting piece.
Further, the external electrode lug is a unitary external electrode lug or a binary external electrode lug.
Further, the front face of the first tab is connected with the back face of the first-order tab connector, the back face of the second tab is connected with the front face of the first-order tab connector, and the middle part of the first-order tab connector is connected with the single external tab.
Further, the front face of the first tab is connected with the back face of the first-order tab connector, the back face of the second tab is connected with the front face of the first-order tab connector, and one side of the first-order tab connector is connected with the single external tab.
Further, the front face of the first lug is connected with the back face of the second lug connecting piece, the back face of the second lug is connected with the front face of the second lug connecting piece, and the middle part of the second lug connecting piece is connected with the unitary external lug.
Further, the front of the first tab is connected with the back of the second tab connector, the back of the second tab is connected with the front of the second tab connector, the front of the third tab is connected with the back of the second tab connector, and the second tab connector is connected with the binary external tab.
Drawings
FIG. 1 is a schematic diagram of a current collector external tab composite assembly according to the present utility model;
FIG. 2 is a schematic diagram of a binary tab composite current collector according to the present utility model;
FIG. 3 is a schematic diagram of a ternary tab composite current collector structure of the present utility model;
FIG. 4 is a schematic view of a first-stage tab connector according to the present utility model;
FIG. 5 is a schematic view of a second-order tab connector according to the present utility model;
FIG. 6 is a front view of a second order tab connector of the present utility model;
FIG. 7 is a schematic view of a unitary external tab structure according to the present utility model;
FIG. 8 is a schematic diagram of a binary external tab structure according to the present utility model;
fig. 9 is a schematic structural diagram of a current collector external tab composite assembly according to embodiment 1 of the present utility model;
fig. 10 is a schematic structural diagram of a current collector external tab composite assembly according to embodiment 2 of the present utility model;
FIG. 11 is a schematic structural diagram of a current collector external tab composite assembly according to embodiment 3 of the present utility model;
fig. 12 is a schematic structural diagram of a current collector external tab composite assembly according to embodiment 4 of the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1. a composite current collector; 2. a current collector connection; 3. externally connected electrode lugs; 4. a first-order tab connector; 5. second-order tab connectors; 6. a unitary external electrode lug; 7. a binary external electrode lug; 8. binary tab composite current collector; 9. ternary tab composite current collector; 10. a tab; 11. a first tab; 12. a second lug; 13. and a third ear.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Example 1
As shown in fig. 1-9, this embodiment provides an external tab composite assembly of current collector, including compound current collector 1 and current collector connector 2, compound current collector 1's one side interval is provided with a plurality of tabs 10, and a plurality of the positive and negative of tab 10 are connected with in a wrong way current collector connector 2, current collector connector 2 electricity is connected with external tab 3, and the staff is according to the whole mass energy density of electric core, volume energy density and the specific combination mode of the external tab composite assembly of electric core multiplying power performance comprehensive judgement current collector.
Preferably, in the embodiment, the device further includes that the first tab 11 and the second tab 12 are arranged at intervals on one side of the composite current collector 1 to form a binary tab composite current collector 8, the first tab 11, the second tab 12 and the third tab 13 are arranged at intervals on one side of the composite current collector 1 in sequence to form a ternary tab composite current collector 9, and the multiple tab composite current collectors can be connected with the front and back sides of different current collector connectors 2 in a staggered manner according to comprehensive judgment.
Preferably, in the embodiment, the current collector connector 2 is a first-order tab connector 4 or a second-order tab connector 5 or a multi-order tab connector, when the multi-element tab composite current collector is a positive electrode, the first-order tab connector 4 or the second-order tab connector 5 or the multi-order tab connector are all made of aluminum foil materials, when the multi-element tab composite current collector is a negative electrode, the first-order tab connector 4 or the second-order tab connector 5 or the multi-order tab connector are all made of copper foil materials, especially the first-order tab connector 4 can reduce the weight of the battery core, and can reduce the influence of tab connection on the volume and the mass energy density.
Preferably, in the embodiment, the external electrode tab 3 is a single external electrode tab 6 or a binary external electrode tab 7 or a multi-element external electrode tab, the positive electrode of the single external electrode tab 6 or the binary external electrode tab 7 or the multi-element external electrode tab is an aluminum electrode tab, the negative electrode is a nickel or copper-clad nickel electrode tab, and the external electrode tab 3 can be welded with different external electrode tabs 3 according to different current collector connecting pieces 2, so that the packaging difficulty of the electrode tab is reduced.
Preferably, in an embodiment, the front surface of the first tab 11 is connected with the back surface of the first-order tab connector 4, the back surface of the second tab 12 is connected with the front surface of the first-order tab connector 4, the middle part of the first-order tab connector 4 is electrically connected with the unitary external tab 6, and the unitary external tab 6 is connected with the middle part of the first-order tab connector 4, so that the weight is not increased additionally, and the energy density can be kept higher.
Example 2
As shown in fig. 10, in this embodiment, except that the welding positions of the external electrode tab 6 and the first-stage electrode tab connector 4 are different, the external electrode tab composite assembly of the current collector in this embodiment and the external electrode tab composite assembly of the current collector in this embodiment are the same as those of the external electrode tab composite assembly of the current collector in this embodiment 1, and further include that the front surface of the first electrode tab 11 is connected with the back surface of the first-stage electrode tab connector 4, the back surface of the second electrode tab 12 is connected with the front surface of the first-stage electrode tab connector 4, and one side of the first-stage electrode tab connector 4 is electrically connected with the external electrode tab 6, which is convenient for the operation of the staff and improves the working efficiency.
Example 3
As shown in fig. 11, in this embodiment, except for the difference of the current collector connector 2, the current collector external connection tab composite assembly in embodiment 1 has the same structure as the current collector external connection tab composite assembly in embodiment 1, and further includes that the front surface of the first tab 11 is connected with the back surface of the second-order tab connector 5, the back surface of the second tab 12 is connected with the front surface of the second-order tab connector 5, and the middle part of the second-order tab connector 5 is electrically connected with the single external tab 6, so that the whole of the binary external tab 7 and the binary tab composite current collector 8 can be prevented from breaking.
Example 4
As shown in fig. 12, in this embodiment, the front surface of the first tab 11 is connected with the back surface of the second tab connector 5, the back surface of the second tab 12 is connected with the front surface of the second tab connector 5, the front surface of the third tab 13 is connected with the back surface of the second tab connector 5, the second tab connector 5 is electrically connected with the binary external tab 7, and the lap joint stability of the binary external tab 7 and the ternary tab composite current collector 9 is increased.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore 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" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (8)
1. The utility model provides a collector external connection utmost point ear composite assembly, its characterized in that includes compound collector (1) and collector connecting piece (2), one side interval of compound collector (1) is provided with a plurality of utmost point ears (10), and a plurality of the positive and negative looks of utmost point ear (10) are connected with in a wrong way collector connecting piece (2), collector connecting piece (2) are connected with external utmost point ear (3).
2. The collector external connection lug composite assembly according to claim 1, wherein a first lug (11) and a second lug (12) are arranged at intervals on one side of the composite collector (1) to form a binary lug composite collector (8), and the first lug (11), the second lug (12) and the third lug (13) are sequentially arranged at intervals on one side of the composite collector (1) to form a ternary lug composite collector (9).
3. The collector external tab composite assembly according to claim 2, wherein the collector connector (2) is a first-order tab connector (4) or a second-order tab connector (5).
4. A collector external tab composite assembly according to claim 3, wherein the external tab (3) is a unitary external tab (6) or a binary external tab (7).
5. The collector external connection tab composite assembly according to claim 4, wherein the front surface of the first tab (11) is connected with the back surface of the first-order tab connector (4), the back surface of the second tab (12) is connected with the front surface of the first-order tab connector (4), and the middle part of the first-order tab connector (4) is connected with the unitary external tab (6).
6. The collector external connection tab composite assembly according to claim 4, wherein the front surface of the first tab (11) is connected with the back surface of the first-order tab connector (4), the back surface of the second tab (12) is connected with the front surface of the first-order tab connector (4), and one side of the first-order tab connector (4) is connected with the unitary external tab (6).
7. The collector external connection tab composite assembly according to claim 4, wherein the front face of the first tab (11) is connected with the back face of the second-order tab connector (5), the back face of the second tab (12) is connected with the front face of the second-order tab connector (5), and the middle part of the second-order tab connector (5) is connected with the monobasic external connection tab (6).
8. The collector external connection tab composite assembly according to claim 4, wherein the front face of the first tab (11) is connected with the back face of the second-order tab connector (5), the back face of the second tab (12) is connected with the front face of the second-order tab connector (5), the front face of the third tab (13) is connected with the back face of the second-order tab connector (5), and the second-order tab connector (5) is connected with the binary external connection tab (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321339738.1U CN219716896U (en) | 2023-05-30 | 2023-05-30 | Collector external lug composite assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321339738.1U CN219716896U (en) | 2023-05-30 | 2023-05-30 | Collector external lug composite assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219716896U true CN219716896U (en) | 2023-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321339738.1U Active CN219716896U (en) | 2023-05-30 | 2023-05-30 | Collector external lug composite assembly |
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| Country | Link |
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| CN (1) | CN219716896U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117996370A (en) * | 2024-04-03 | 2024-05-07 | 蜂巢能源科技股份有限公司 | Manufacturing method of composite current collector pole piece and evaluating method of composite current collector pole piece |
-
2023
- 2023-05-30 CN CN202321339738.1U patent/CN219716896U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117996370A (en) * | 2024-04-03 | 2024-05-07 | 蜂巢能源科技股份有限公司 | Manufacturing method of composite current collector pole piece and evaluating method of composite current collector pole piece |
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