CN220672806U - Tab structure, soft package electric core and battery package - Google Patents
Tab structure, soft package electric core and battery package Download PDFInfo
- Publication number
- CN220672806U CN220672806U CN202321993970.7U CN202321993970U CN220672806U CN 220672806 U CN220672806 U CN 220672806U CN 202321993970 U CN202321993970 U CN 202321993970U CN 220672806 U CN220672806 U CN 220672806U
- Authority
- CN
- China
- Prior art keywords
- film
- metal strip
- tab
- tab structure
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 70
- 239000002184 metal Substances 0.000 claims abstract description 70
- 229910052782 aluminium Inorganic materials 0.000 abstract description 13
- 239000002985 plastic film Substances 0.000 abstract description 13
- 229920006255 plastic film Polymers 0.000 abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- 238000007731 hot pressing Methods 0.000 abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a tab structure, a soft-package battery cell and a battery pack, wherein the tab structure comprises: the metal strip and the tab film arranged on the metal strip, wherein the tab film comprises a first film arranged on the upper surface of the metal strip and a second film arranged on the lower surface of the metal strip, the first film and the second film are oppositely arranged, the thicknesses of the first film and the second film are T2, and the thickness of the metal strip is T1, wherein T2/T1 is more than or equal to 0.6 and less than or equal to 1. According to the tab structure, the proportional relation between the thickness of the metal belt of the tab structure and the thickness of the tab film is arranged, so that the problem that the aluminum plastic film sealed by the soft package battery core or the tab film is damaged due to the fact that the pressure applied by the hot-pressing seal head is too large is avoided, and the problem that the leakage is caused due to the fact that the two sides of the tab film are not tightly sealed with the aluminum plastic film of the soft package battery core due to the fact that the pressure applied by the hot-pressing seal head is insufficient is avoided.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a tab structure, a soft package battery cell comprising the tab structure and a battery pack.
Background
With the rapid development of the technology of the soft-package battery, the soft-package battery is widely applied to the fields of consumption, power, energy storage and the like, and the energy density and the charge and discharge speed of the battery are also greatly improved. The metal lead of the tab is used as a bridge for transmitting electrons outwards in the soft package battery, and the metal lead needs to pass through a sealing edge structure of the soft package battery, so that a PP (polypropylene)/PE (polyethylene)/PP+PE film with a certain thickness is required to be compounded on the surface of the metal lead of the tab, the film compounded on the surface of the metal lead of the tab is compounded and sealed with a soft package edge aluminum plastic film material, and the thickness of the compounded film and the thickness of the metal lead of the tab need to meet a certain size so as to ensure the packaging reliability of the tab and the soft package battery seal in the battery manufacturing process.
The traditional tab structure design generally only thickens the thickness of the metal lead or the thickness of the film, the interaction effect of the metal lead and the film is not considered, and the sizes of the film and the metal lead of the tab are not considered too much, so that poor edge bonding between the tab lead and the aluminum plastic film of the soft package battery can occur in the battery manufacturing process, bubbles and channels are generated, the tightness of the soft package battery is affected, and even the problem of internal electrolyte leakage can occur.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model aims to provide a tab structure, which comprises: the metal strip and the tab film arranged on the metal strip, wherein the tab film comprises a first film oppositely arranged on the upper surface of the metal strip and a second film oppositely arranged on the lower surface of the metal strip, the thicknesses of the first film and the second film are T2, and the thickness of the metal strip is T1, wherein T2/T1 is more than or equal to 0.6 and less than or equal to 1.
In one aspect of the utility model, the metal strip has a thickness T1 of 0.05-0.6mm.
In one aspect of the utility model, the first film extends beyond the metal strip by a length W2 of 1.0mm to 6.0mm in the width direction.
In one aspect of the present utility model, the width W1 of the metal strip is 15mm to 80mm, and the dimension H1 of the first film and the second film in the metal strip length direction is 5mm to 15mm.
In one aspect of the utility model, the first edge of the first film and the first edge of the second film are spaced from the first edge of the metal strip by a distance H2 of 5mm or more.
In one aspect of the utility model, the two side ends of the metal belt in the width direction are provided with chamfer structures, the chamfer structures are isosceles trapezoid chamfer structures, and an included angle C of two inclined surfaces of the chamfer structures is 10-80 degrees.
In one aspect of the utility model, two ends of the metal strip in the width direction are provided with chamfer structures, the chamfer structures are isosceles triangle chamfer structures, and an included angle C of two inclined surfaces of the chamfer structures is 10-80 degrees.
In one aspect of the utility model, the two ends of the metal strip in the width direction and the two included angles of the second side of the metal strip are provided with rounded structures.
The utility model also provides a soft-package battery core, which comprises the tab structure.
The utility model also provides a battery pack, which comprises the soft-pack battery cell.
The beneficial effects of the utility model at least comprise: through setting up the thickness of the strap of utmost point ear structure and the proportional relation of the thickness of utmost point ear film, avoid because the hot pressing head exerts the too big plastic-aluminum membrane or the damage of utmost point ear film that leads to the banding of soft packet of electric core, and avoid because the pressure that the hot pressing head applyed is not enough lead to utmost point ear film both sides and the plastic-aluminum membrane encapsulation of soft packet of electric core not closely and the problem of weeping.
Drawings
Fig. 1 is a schematic top view of a tab structure according to an embodiment of the present utility model.
Fig. 2 is a schematic A-A cross-section of a tab structure according to an embodiment of the present utility model.
Fig. 3 is a schematic partial view of a tab structure according to an embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The related embodiments described herein are of illustrative nature and are intended to provide a basic understanding of the utility model. The embodiments of the present utility model should not be construed as limiting the utility model.
Referring to fig. 1 to 3, fig. 1 is a schematic top view of a tab structure 1 in the present embodiment. Fig. 2 is a schematic A-A section view of a tab structure according to an embodiment of the present utility model. Fig. 3 is a schematic partial view of a tab structure according to an embodiment of the present utility model.
The tab structure 1 includes a metal tape 10 and a tab film 11 adhered to the surface of the metal tape 10. The metal strip 10 is a strip-shaped sheet metal strip and includes opposite upper and lower surfaces 101 and 102. The tab film 11 includes a first film 111 adhered to the upper surface 101 of the metal tape 10 and a second film 112 adhered to the lower surface 102 of the metal tape 10, the first film 111 and the second film 112 being disposed opposite to each other. The metal strip 10 has a thickness T1, and the first film 111 and the second film 112 have the same thickness T2. The thickness T2 of the first film 111 and the second film 112 has a relationship of 0.6.ltoreq.T2/T1.ltoreq.1 with the thickness T1 of the metal strip 10.
In some embodiments of the present utility model, the thickness T1 of the metal strip 10 is between 0.05mm and 0.6mm, the thickness T2 of the first film 111 and the second film 112 is between 0.03mm and 0.6mm, and such a thickness of the metal strip 10 is disposed in relation to the thickness of the first film 111 and the second film 112, and the total thickness of the first film 111, the second film 112 and the metal strip 10 bonded together is within a suitable thickness range. When the tab structure 1 is heat-sealed in the edge sealing of the soft package battery core, the situation that the total thickness of the first film 111, the second film 112 and the metal belt 10 bonded together is too thick is avoided, and when the hot-pressing seal head applies pressure to the soft package battery core aluminum plastic film and the tab structure 1, the first film 111 and/or the second film 112 are excessively adhered to the aluminum plastic film, so that the aluminum plastic film sealed by the soft package battery core or the tab film 11 is damaged, and poor packaging of the tab structure 1 is caused. The problem that when the hot-pressing seal head applies pressure to the soft-package battery core aluminum-plastic film and the tab structure 1, the first film 111 and/or the second film 112 are not sufficiently pressed with the aluminum-plastic film, so that the adhesive strength of the tab film 11 and the aluminum-plastic film is insufficient, the aluminum-plastic film of the soft-package battery core is not tightly packaged at two sides of the metal belt 10, and the problem of leakage caused by adhesive opening can be generated after long-term use can also be avoided.
In some embodiments of the present utility model, the two ends of the first film 111 and the second film 112 extend beyond the two sides of the metal strip 10 in the width direction, and the first film 111 and one end of the second film 112 extending beyond the same side of the metal strip 10 in the width direction are bonded together opposite to each other, and the first film 111 and the second film 112 completely seal the two sides of the metal strip 10 in the width direction.
In some embodiments of the present utility model, the length W2 of the first film 111 and the second film 112 beyond both sides of the metal strip 10 in the width direction is 1mm to 6mm. The first film 111 and the second film 112 extend a certain length from two sides of the metal strip 10 in the width direction, so that the heat sealing reliability of the two sides of the metal strip 10 in the width direction and the soft package cell aluminum plastic film is improved.
In some embodiments of the present utility model, the width W1 of the metal strip 10 is 15mm-80mm, and the width H1 of the first film 111 and the second film 112 in the length direction of the metal strip 10 is 5mm-15mm. The first film 111 and the second film 112 have enough widths, so that the tab structure 1 has enough seal width when being packaged with the aluminum plastic film of the soft package battery core in a hot pressing manner, and the seal width is smaller than the widths of the first film 111 and the second film 112.
In some embodiments of the present utility model, the first edge 1111 of the first film 111 and the first edge 1121 of the second film 112 are separated from the first edge 103 of the metal strip 10 by a distance H2 of greater than or equal to 5mm.
The first edge 103 of the metal strip 10 is welded to the pole group structure of the soft package battery cell, so that a predetermined distance is provided between the first edge 1111 of the first film 111 and the first edge 1121 of the second film 112 and the first edge 103 of the metal strip 10 in order to ensure that the first edge 103 of the metal strip 10 has a sufficient welding area with the pole group structure of the battery cell.
In some embodiments of the present utility model, the two sides of the metal strip 10 in the width direction are provided with the chamfer structures 105, and the chamfer structures 105 may be isosceles trapezoid chamfer or isosceles triangle chamfer structures, the chamfer structures 105 have two inclined surfaces, and the included angle C of the two inclined surfaces of the chamfer structures 105 is 10 degrees to 80 degrees. The two inclined surfaces of the chamfer structure 105 form an included angle, the first film 111 and the second film 112 are tightly adhered together after being adhered to the metal belt 10 along the inclined surfaces respectively, the chamfer structure 105 is arranged to enable the first film 111 and the second film 112 to be completely adhered and sealed at the two sides of the metal belt 10, and the two sides of the width direction of the sealed metal belt 10 correspond to the positions of the first film 111 and the second film 112, so that a liquid leakage channel is avoided being formed at the positions.
In some embodiments of the present utility model, the two angles between the two ends of the metal strip 10 in the width direction and the second edge 104 of the metal strip 10 are provided with rounded structures (not shown in the figure), and the rounded structures can avoid the corners of the metal strip 10 from scratching or puncturing the plastic-aluminum film casing of other soft-packaged cells during the transportation or grouping of the cells.
In some embodiments of the present utility model, the metal sheet 10 is typically copper, aluminum, nickel or nickel plated copper.
The utility model also provides a soft-package battery core, which comprises the tab structure body in the embodiment of the utility model.
The utility model also provides a battery pack, which comprises the soft-pack battery cell in the embodiment of the utility model.
Although illustrative embodiments have been shown and described, it will be understood by those skilled in the art that the foregoing embodiments are not to be construed as limiting the utility model, and that changes, substitutions and alterations may be made herein without departing from the spirit, principles and scope of the utility model.
Claims (10)
1. The utility model provides a tab structure, includes the strap and sets up tab film on the strap, its characterized in that, the tab film is including setting up the first film of strap upper surface and setting up the second film on the strap lower surface, first film with the second film sets up relatively, first film with the thickness of second film is T2, the thickness T1 of strap, wherein, 0.6 is less than or equal to T2/T1 is less than or equal to 1.
2. The tab structure of claim 1, wherein the metal strip has a thickness T1 of 0.05mm-0.6mm.
3. The tab structure of claim 1, wherein the portion of the first film extending beyond the metal strip in the width direction extends a length W2 of 1mm to 6mm.
4. The tab structure of claim 1, wherein the width W1 of the metal strip is 15mm to 80mm, and the dimension H1 of the first film and the second film in the metal strip length direction is 5mm to 15mm.
5. The tab structure of claim 1 wherein the first edge of the first film and the first edge of the second film are spaced from the first edge of the metal strip by a distance H2 ∈5mm.
6. The tab structure according to claim 1, wherein the metal strip is provided at both ends in a width direction with a chamfer structure, the chamfer structure is an isosceles trapezoid chamfer structure, and an included angle C of two inclined surfaces of the chamfer structure is 10 degrees to 80 degrees.
7. The tab structure according to claim 1, wherein both ends of the metal strip (10) in the width direction are provided with chamfer structures, the chamfer structures are isosceles triangle chamfer structures, and an included angle C of two inclined surfaces of the chamfer structures is 10 degrees to 80 degrees.
8. Tab structure according to claim 1, characterized in that the two ends of the metal strip in the width direction are provided with rounded structures at two angles to the second side of the metal strip (10).
9. A soft pack cell characterized in that the cell comprises the tab structure of any one of claims 1-8.
10. A battery pack comprising the soft pack cell of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321993970.7U CN220672806U (en) | 2023-07-25 | 2023-07-25 | Tab structure, soft package electric core and battery package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321993970.7U CN220672806U (en) | 2023-07-25 | 2023-07-25 | Tab structure, soft package electric core and battery package |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220672806U true CN220672806U (en) | 2024-03-26 |
Family
ID=90342992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321993970.7U Active CN220672806U (en) | 2023-07-25 | 2023-07-25 | Tab structure, soft package electric core and battery package |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220672806U (en) |
-
2023
- 2023-07-25 CN CN202321993970.7U patent/CN220672806U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |